WO2002005641A1

WO2002005641A1 - Coated pesticidal composition

Info

Publication number: WO2002005641A1
Application number: PCT/EP2001/008009
Authority: WO
Inventors: Kenichi Kitagaki
Original assignee: Syngenta Participations Ag
Priority date: 2000-07-13
Filing date: 2001-07-11
Publication date: 2002-01-24
Also published as: GB0017277D0; JP2004503567A; JP5016773B2; AU2001287602A1

Abstract

The instant invention discloses a pesticidal composition, comprising: (1) a slow-releasing coated solid pesticide, comprising a pesticidal active ingredient which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer and (2) a fast-releasing coated solid pesticide, comprising the same active ingredient as that of the above pesticide (1) which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer, characterized in that the slow-releasing and fast-releasing properties are controlled only by adjusting the contents of said thermoplastic polymer, only by adjusting the contents of said active ingredient, or by adjusting the contents of said thermoplastic polymer and contents of said active ingredient. This composition enables desired release properties under varying, in particular rising temperature conditions.

Description

Coated Pesticidal Composition

The instant invention relates to a composition comprising a slow-releasing coated pesticide and a fast-releasing coated pesticide.

Coated solid pesticides are well known in the art, being usually applied for controlling the release of their active ingredients as described for example in PCT WO 99/01243. However, conventional coated pesticides do not exhibit satisfactory release properties if the temperature varies, especially rises, after application thereof due to the temperature dependence of release rates of active ingredients.

It has now been surprisingly found that a pesticidal composition, comprising:

(1 ) a slow-releasing coated solid pesticide, comprising a pesticidal active ingredient which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer and

(2) a fast-releasing coated solid pesticide, comprising the same active ingredient as that of the above pesticide (1 ) which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer, characterized in that the slow-releasing and fast-releasing properties are controlled only by adjusting the contents of said thermoplastic polymer, only by adjusting the contents of said active ingredient, or by adjusting the contents of said thermoplastic polymer and contents of said active ingredient, unexpectedly exhibits desired release properties under varying, in particular rising temperature conditions, the temperature rising at least from 15°C to 25°C after application of said composition.

The above slow-releasing coated pesticide (1 ) usually exhibits long-lasting pesticidal effects at higher temperatures whilst the fast-releasing coated pesticide (2) usually shows long-lasting pesticidal effects at lower temperatures, in water. Therefore, by properly combining these two types of pesticides (1) and (2) with the same pesticidal active ingredient, it is possible to keep, in water, the release of the active ingredient substantially constant during the period where the temperature is initially low and finally high. The composition of the instant invention as defined above achieves such controlled release even when it is applied only once at the initial stage of seeding / cultivation. The pesticidal active ingredients to be used in the instant invention include herbicides, fungicides and insecticides as well as plant growth regulators and inhibitors and plant activators. As herbicides there are for example Pretilachlor, Clomeprop, Bifenox, Pyrazoxyfen, Pyrazolynate, Cinosulfuron, Dimepiperate, Bensulfuron-methyl, Pyrazosulfuron-ethyl, Naproanilide, Bromobutide, Mefenacet, Imazosulfuron, Daimuron, Bentazon, Simetryn, Etobenzanid, Cyhalofop-butyl, Cafenstrole, Azimsulfuron, Pyriminobac-methyl, Benzofenap, Pyributicarb, Thenylchlor, MCPB, Benfuresate, Butamifos, Cyclosulfamuron, Dimethametryn, Esprocarb, Fentrazamide, Indanofan, Isoprothiolane, Molinate, Oxadiclomefon, Oxaziclomefone, Paclobutrazol, Pentoxazone, Prohexadione-ca, Pyrazogyl, Simetryne, Thiobencarb and Uniconazole. As fungicides there are for example Acibenzolar-S-Methyl, Isoprothiolane, Ipconazole, Iprodione, Oxolinic acid, Kasugamycin, Capropamid, Captan, Thiabendazole, Thiram, Thiophanate-methyl, Organocopper, Tricyclazole, Triflumizole, Validamycin, Azoxystrobin, Pyroquilon, Fludioxonil, Prochloraz, Probenazole, Benomyl, Methasulfocarb, TPN, BJL-002, BJL-003, Chlorothalonil, Copper, Diclocymet, Diclomezine, Edifenphos, Fenoxanil, Ferimzone, Flutolanil, Furametpyr, Hymexazol, Mepronil, Metominostrobin, Pefurazoate, Pencycuron, Tecloftalam and Thifluzamide. As insecticides there are Isoprothiolane, Imidacloprid, Etofenprox, Cartap, Thiamethoxam, Thiocyclam, Bensultap, Bendiocarb, Monocrotophos, Alprocarb, Pymetrozine, Benfuracarb, Buprofezin, Carbosulfan, Cycloprothrin, Fenitrothion, Fipronil, Isoxathion, Phenthoate, Silafluofen, Triazophos, Trichlorfon, Methoxyfenozide and Clothianidin.

Among these pesticidal active ingredients, Acibenzolar-S-methyl, Fludioxonil and Pyroquilon as fungicides, Thiamethoxam, Thiocyclam and Pymetrozine as insecticides, and Pretilachlor, Cinosulfuron as a herbicide, all manufactured by Novartis Crop Protection AG, are particularly preferred.

The solid carriers suitably used are normally natural mineral fillers, such as zeolite, calcite, talcum, kaolin, montmorillonite, attapulgite or other mineral carriers. In order to improve the physical properties it is also possible to add highly dispersed silisic acid or highly dispersed absorbent polymers. Suitable granulated adsorptive carriers are porous types, for example pumice, broken brick, sepiolite or bentonite, and suitable nonsorbent carriers are, for example, calcite or sand. In addition, a great number of pregranulated materials of inorganic or organic nature can be used, e.g. especially dolomite or pulverised plant residues.

Suitable surfactants and dispersants are non-ionic, cationic and/or anionic having good emulsifying, dispersing and wetting properties.

Suitable anionic dispersants/surfactants are for example:

Salts of polystyrenesulfonic acid, in particular the alkali metal, alkaline earth metal and ammonium salts;

Salts of polyvinylsulfonic acid, in particular the alkali metal, alkaline earth metal and ammonium salts;

Salts of condensates of naphthalenesulfonic acids, preferably naphthalene-2-sulfonic acid, with formaldehyde, in particular the alkali metal, alkaline earth metal and ammonium salts;

Salts of condensates of naphthalenesulfonic acid with phenolsulfonic acid and formaldehyde, in particular the alkali metal, alkaline earth metal and ammonium salts;

Salts of ligninsulfonic acid, in particular the sodium, potassium, magnesium, calcium or ammonium salts;

Salts of naphthalenesulfonic acids, in particular the alkali metal, alkaline earth metal and ammonium salts.

Suitable nonionic dispersants/surfactants are for example polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, alkylated polyvinylpyrrolidone, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose (degree of substitution: 1.5 to 2), hydroxyethylmethyl cellulose, hydroxypropylmethyl celulose, poly(2-hydroxyethyl)methacrylate, poly[2-(2-hydroxyethoxy)ethyl]methacrylate, polyethylene oxide (polyoxyethylene) and polyallyl alcohol (polyglycidol);

Products which can be obtained by reaction of ethylene oxide, or by the combined reaction of ethylene oxide and propylene oxide, with fatty alcohols, alkyl phenols, styrenephenols, fatty acids, fatty acid esters of polyhydroxy compounds, castor oil, fatty acid amides and fatty amines, where the number of ethylene oxide and propylene oxide units may vary within wide limits. In general, the number of ethylene oxide units or ethylene oxide and propylene oxide units is from 1 to 200, preferably from 5 to 100 and, most preferably, from 8 to 40. Suitable cationic dispersants/surfactants are for example quaternary ammonium salts which contain, as N-substituent, at least one C₈-C₂₂alkyl radical and, as further substituents, unsaturated or halogenated lower alkyl, benzyl or hydroxy-lower alkyl radicals.

The granules or powders of pesticides of (1) and (2) can be produced by any known method, such as mixing the active ingredient with the carrier materials, dispersants /surfactants and adjuvants, subsequently granulation by means of extrusion, campaction, agglomeration by fluidized bed granulator or agitation granulator; milling by means of mechanical milling, e.g. hammer mill, or by means of wet milling, e.g. beads mill; tabletting by means of roller compactor. The content of active ingredient can vary within a wide range, for example from 1-50wt% based on the total weight of the granules or powder. As examples of such granules or powders there are Bion core GR2.5/2.7/2.8/3.3, which are granules containing Acibenzolar-S-Methyl in an amount of respectively 2.5, 2.7, 2.8 and 3.3wt%, Actara core GR2.4/2.5/3.3, which are granules containing Thiamethoxam in an amount of respectively 2.4, 2.5 and 3.3wt%, and Pyroquilon core GR2.4/4.7/9.4/26.3 /32.2/36.6, which are granules containing Pyroquilon in an amount of respectively 2.4, 4.7, 9.4, 26.3, 32.2 and 36.6wt%, all of which are commercial products of Novartis Agro KK.

Prior to coating with the water-emulsifiable thermoplastic polymer, the above granules or powders may be coated entirely or partially with a hydrophobic liquid, such as olive oil, palm oil, soybean oil, liquid paraffin or the like; preferably with liquid paraffin. The hydrophobic liquid is used in an amount of 0.01-10wt%, preferably 0.05-5wt%, most preferably 0.1 -1wt%, based on the total weight of the composition of the instant invention.

These granules or powders of pesticides (1 ) and (2) are coated with one or more layers of a water-emulsifiable thermoplastic polymer. "Water-emulsifiable thermoplastic polymer" acording to the instant invention means any polymer which is water-emulsifiable, thermoplastic and film forming. They are well known in the art. Examples of such polymers include polyethylene, polypropylene and copolymers of ethylene and/or propylene with unsubstituted or substituted olefins as comonomers; polyvinyl alcohol and copolymers of vinyl alcohol with unsubstituted or substituted olefins as comonomers; polymethacrylates, polyacrylates and copolymers of methacrylates and/or acrylates with unsubstituted or substituted olefins as comonomers; polymethacrylic acid, polyacrylic acid and polymaleic acid and copolymers of methacrylic acid, acrylic acid and/or maleic acid with unsubstituted or substituted olefins as comonomers; polymaleic acid esters and copolymers of maleic acid esters with unsubstituted or substituted olefins as comonomers; polyvinyl acetate and copolymers of vinyl acetate with unsubstituted or substituted olefins as comonomers; polyacrylonitrile and copolymers of acrylonitrile with unsubstituted or substituted olefins as comonomers; polyacrylamide and polymethacrylamide and copolymers of acrylamide, methacrylamide or both with unsubstituted or substituted olefins as comonomers; polyhydroxyalkyl- or polyaminoalkyl vinylalcohol and copolymers of hydroxyalkylvinylether, aminoalkylvinylether or both with unsubstituted or substituted olefins as comonomers; polybutadiene, polyisoprene, polychloroprene and copolymers of butadiene, isoprene, chloroprene or two or three of these with unsubstituted or substituted olefins as comonomers; hydroxylated polybutadienes from butadiene, isoprene or chloroprene and copolymers of butadiene, isoprene, chloroprene or two or three of these monomers with unsubstituted or substituted olefins as comonomers; polystyrene and copolymers of styrene with unsubstituted or substituted olefins; hydroxy- or aminopolystyrene, chloromethylpolystyrene, and polystyrenesulfonic acid and copolymers of hydroxystyrene, aminostyrene, chloromethylstyrene, polystyrenesulfonic acid, or two or more of these monomers with unsubstituted or substituted olefins as comonomers; polyurethanes.

Preferred polymers are for example polyethylene, polypropylene and copolymers of ethylene and/or propylene with unsubstituted or substituted olefins as comonomers; polymethacrylates, polyacrylates and copolymers of methacrylates and/or acrylates with unsubstituted or substituted olefins as comonomers; polyvinylacetate and copolymers of vinylacetate with unsubstituted or substituted olefins as comonomers; polyacrylonitrile and copolymers of acrylonitrile with unsubstituted or substituted olefins as comonomers; copolymers of acrylamide or methacrylamide with unsubstituted or substituted olefins as comonomers; polybutadiene, polyisoprene, polychloroprene and copolymers of butadiene, isoprene, chloroprene or two or three of these with unsubstituted or substituted olefins as comonomers; polystyrene and copolymers of styrene with unsubstituted or substituted olefins; copolymers of hydroxystyrene, aminostyrene, chloromethylstyrene or polystyrenesulfonic acid with unsubstituted or substituted olefins as comonomers; polyurethanes.

Particularly preferred polymers are for example polyacrylates, such as polymethylacrylate and polyethylacrylate; polymethacrylates, such as polymethylmethacrylate and polyethylmethacrylate; polyvinylacetate; polystyrene; styrene/acrylate copolymers, such as styrene/methylacrylate and styrene/ethylacrylate; styrene/methacrylate copolymers, such as styrene/methylmethacrylate and styrene/ethylmethacrylate; vinylacetate/acrylate copolymers, such as vinylacetate/methylacrylate and vinylacetate/ethylacrylate; vinylacetate/methacrylate copolymers, such as vinylacetate/methylmethacrylate and vinylacetate/ethylmethacrylate; ethylene/vinylacetate copolymer; ethylene/vinylacetate/acrylate terpolymers, such as ethylene/vinylacetate/methylacrylate; ethylene/vinylacetate/methacrylate terpolymers, such as ethylene/vinylacetate/methylmethacrylate; polybutadiene; polyisoprene. Particularly preferred are polyacrylates and polyvinylacetate. These polymers can be used alone or as mixtures.

In the case where more than one coating layer are formed on the granules or powders of pesticides (1 ) and (2), the layers do not necessarily need to be made of identical polymer(s). For example, the first layer can be made of polyvinylacetate, the second layer from a polyethylene-polyvinylacetate mixture, and the third layer from ethylene/vinylacetate/methylmethacrylate copolymer. If the layers are consisting of different polymers, an "inter-phase boundary" is formed between the layers which can be observed for example by using an optical microscope or an electron microscope.

If the release control is to be achieved only by adjusting the polymer contents, the polymer content is 15-50wt%, preferably 20-40wt%, for pesticide (1 ) based on the total weight thereof, and 1-20wt%, preferably 2-15wt%, for pesticide (2) based on the total weight thereof. The polymer contents may be determined empirically for each of pesticides (1 ) and (2) such that desired release property be obtained, said release property being strongly dependent on the nature and active ingredient content in the granules or powder of pesticides (1 ) and (2) as well as natural conditions under which the composition of the instant invention is applied. The number of polymer coating layers varies with the thickness of each layer and can usually be 1-20, preferably 1-15. The content of active ingredient can be chosen within a wide range, for example from 1-50wt% based on the total weight of the granules or powder.

If the release control is to be achieved only by adjusting the contents of active ingredient, granules or powder with lower active ingredient content is used for pesticide (1) and those with higher active ingredient content for pesticide (2). In this case, the active ingredient contents for pesticides (1) and (2) are empirically determined under a predetermined polymer content. The number of polymer layers is 1-20, preferably 1-15. The active ingredient contents of pesticides (1 ) and (2) are respectivelyl -50wt% based on the total weight of respective granules or powders, with the proviso that the former is lower than that of the latter.

If the release control is to be achieved by adjusting the polymer contents and contents of active ingredient, the polymer content is 15-50wt%, preferably 20-40wt%, for pesticide (1) based on the total weight thereof and 1 -20wt%, preferably 2-15wt%, for pesticide (2) based on the total weight thereof. The polymer contents may be determined empirically for each of pesticides (1) and (2) such that desired release property be obtained, said release property being strongly dependent on the nature and active ingredient content in the granules or powder of pesticides (1) and (2) as well as natural conditions under which the composition of the instant invention is applied. The number of polymer coating layers varies with the thickness of each layer and can usually be 1-20, preferably 1-15. In this case the content of active ingredient can be chosen within a wide range, for example from 1 -50wt% based on the total weight of the granules or powder. The active ingredient contents of pesticides (1) and (2) are respectively from 1-50wt% based on the total weight of respective granules or powders, where the former can be lower or higher than that of the latter. This combination enables the release control within an extraordinary wide range.

The granules or powders of pesticides (1) and (2) are preferably non-water-dispersible and may optionally be covered with other ingredients in order to avoid sticking together, for example by inorganic particles, such as talcum, clay, bentonite, calcium carbonate and the like, preferably by talcum. Such ingredients may be added in an amount of 0.01 -10wt%, preferably 0.05-5wt%, most preferred 0.1-2wt%, based on the total weight of respective pesticides.

The pesticides (1) and/or (2) may additionally comprise other ingredients, such as fertilizers, binders, carrier materials and the like customarily used in the art.

When necessary, the composition of the instant invention may further comprise

(1 )' another slow-releasing coated solid pesticide, comprising another pesticidal active ingredient (hereinafter, referred to as "another active ingredient") which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer and

(2)' another fast-releasing coated solid pesticide, comprising "another active ingredient" which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer, characterized in that the slow-releasing and fast-releasing properties are controlled only by adjusting the contents of said thermoplastic polymer, only by adjusting the contents of "another active ingredient", or by adjusting the contents of said thermoplastic polymer and contents of said "another active ingredient" . What is described above exactly applies to the above pesticides (1)' and (2)'. Such a composition is particularly useful when desired to keep more than one pesticidal function, e.g. fungicidal function and insecticidal function, substantially constant under varying, in particular rising temperature conditions.

The invention further relates to a method for producing the composition as described above, comprising the steps of preparation of pesticides (1) and (2), followed by mixing them.

The process for the preparation of pesticide (1 ) comprises the step of:

1. charging the granules or powder into a mixer,

2. optionally adding a hydrophobic liquid,

3. adding an aqueous polymer emulsion,

4. removing the water from the mixture prepared in steps 1 -3 by bringing it into contact with overflowing air,

5. optionally repeating the steps 3-4 until a desired number of polymer coating layers are formed,

6. subjecting the coated granules or powder to post drying, wherein the steps 2-5 are carried out with the mixer rotating.

In a preferred mode, steps 3-4 are carried out simultaneously and continuously. Step 4 is advantageously carried out with pre-dried air kept at a temperature of 25-50°C. As a mixer used in step 1 , any mixer known in the art, such as an onion pan, may be used. Particularly preferred is a concrete mixer customarily used in construction engineering. The amount of the granules or powder to be charged into the mixer is determined in accordance with the capacity of the mixer as well as the required amount of pesticide (1). Step 2 is an optional step. However, it is preferred to incorporate this step in view of prevention of the formation of agglomerates or flocculation of the granules or powder which eventually causes incomplete coating layers. Any hydrophobic liquid, such as olive oil, palm oil, and soybean oil can be used. Most preferred hydrophobic liquid is a liquid paraffin. The hydrophobic liquid is added in an amount of 0.01 -10wt%, preferably 0.05-5wt%, more preferabny 0.1 -1wt%, based on the total weight of pesticide (1). The aqueous polymer emulsion used in step 3 is prepared from water-emulsifiable thermoplastic polymers by mixing with water. The contact with dried air is usually achieved by means of air blow customarily used in the art. The blow rate can be selected in accordance with the amount of the granules or powder of step 1 and that of the aqueous polymer emulsion of step 2. For example, blow rate of 45 πVVmin is conveniently employed when the amount of granules (1 mm in diameter and 3 mm in length) of Step 1 is 200Kg and that of an aqueous PVAc (polyvinylacetate) emulsion (a 50% emulsion) of Step 2 is 11.9Kg. Decrease in rate of drying can be detected by any known method, such as humidity detection. Steps 3-4 are repeated until a set of coating layers is formed, which coating layers occupy the predetermined content in the granules or powder . The number of coating layers is chosen in accordance with the above description. When coating granules, rotation speed of 5-100rpm, preferably 5-50rpm, more preferably 5-30rpm is conveniently employed. After Step 4 or 5, other ingredients in order to avoid sticking together of the granules or powder may be added as described above.

The process for the preparation of pesticide (2) is similar to the above process for pesticide (1 ) except that the granules or powder in Step 1 have an active ingredient content different from that of pesticide (1 ) if the release control includes the adjustment of active ingredient content, that the kind of added polymer emulsion in Step 3 can be different although the polymer to be used for pesticide (2) is usually identical to that for pesticide (1 ), and that the number of coating layers in Step 5 is usually different from that of pesticide (1) if the release control includes the adjustment of polymer contents and every coating layer has the same thickness throughout pesticides (1 ) and (2). The choice of the number of polymer layers and active ingredient content has already been described.

The pesticides (1) and (2) thus prepared are then mixed at a desired mixing ratio to thereby obtain a composition of the instant invention.

If it is desired to prepare a composition comprising a first slow-releasing pesticide (1), a first fast-releasing pesticide (2), a second slow-releasing pesticide (1)' and a second fast-releasing pesticide (2)', where the active ingredient of (1)' and (2)' is different from that of (1) and (2), the pesticides (1), (2), (1)' and (2)' can be separately prepared and then mixed at a desired mixing ratio. As described above this composition exhibits two different pesticidal functions corresponding to the active ingredients, which functions remain constant under rising temperature conditions. Such a composition can also be prepared by subjecting a mixture of the granules or powders for pesticides (1 ) and (1)' to the above Steps 1-6 to thereby obtain a mixture of slow-releasing pesticides (1) and (1)' having the same polymer coating layers. A mixture of fast-releasing pesticides (2) and (2)' is prepared in the same manner, followed by mixing with the above prepared mixture of the slow-releasing pesticides (1) and (1)'. The mixing ratio between the granules for pesticides (1) and (1)' or (2) and (2)' corresponds to the desired mixing ratio of pesticides (1 ) and (1)' or (2) and (2)'. It is further possible to prepare such a composition by firstly preparing granules or powder containing active ingredients for pesticides (1) and (1)', then subjecting to the above Steps 1-6 to obtain a mixture of slow-releasing pesticides (1) and (1)' only different in the kind and content of active ingredients. A mixture of fast-releasing pesticides (2) and (2)' is prepared in the same manner, followed by mixing with the above prepared mixture of the slow-releasing pesticides (1) and (1 )'. The mixing ratio between the active ingredients for pesticides (1) and (1)' or (2) and (2)' corresponds to the desired mixing ratio of pesticides (1 ) and (1)' or (2) and (2)'.

Examples

Using the following starting materials, compositions of the instant invention are prepared and release behavior of some of them is examined.

Bion/Actara core GR (2.5+2.5):

Rod-like granules having a diameter of about 1mm and a length of about 3mm, consisting of

2.5wt% of Acibenzolar-S-Methyl, a plant activator protecting the plants from pathogene attack by activating the plants natural defence system, a product of Novartis Crop

Protection AG, 2.5wt% of Thiamethoxam, an insecticide, a product of Novartis Crop Protection AG, 15wt% of ZEEKLITE SGW, a product of ZEEKLITE Co.,l_td., 5.6wt% of Amycol C (pregelatinized starch), a product of NIPPON STARCH CHEMICAL Co.,

Ltd. and 74.4wt% of Neoraito Clay, a product of NEORAITO KOSAN Co.,Ltd. Bion/Actara core GR (3.3+3.3):

Rod-like granules having a diameter of about 1 mm and length of about 3mm, consisting of

3.3wt% of Acibenzolar-S-Methyl,

3.3wt% of Thiamethoxam,

15wt% of ZEEKLITE SGW,

7.2wt% of Amycol C (pregelatinized starch) and

71.2wt% ofNeoraito Clay.

Pyroquilon/Actara core GR (2.4+2.4):

Rod-like granules having a diameter of about 1 mm and a length of about 3mm, consisting of

2.4wt% of Pyroquilon, an insecticide, a product of Novartis Crop Protection AG,

2.4wt% of Thiamethoxam,

50wt% of AX Clay, a product of NEORAITO KOSAN Co.,Ltd.,

3.0wt% of SH-502, a PVAc 50% emulsion, a product of Showa Kobunshi Co.,

5.0wt% of Amycol C (pregelatinized starch) and

37.2wt% of Neoraito Clay.

Pyroquilon/Actara core GR (36.5+3.3):

36.5wt% of Pyroquilon,

3.3wt% of Thiamethoxam,

30wt% of AX Clay,

3.0wt% of SH-502,

5.0wt% of Amycol C (pregelatinized starch) and

22.2wt% of Neoraito Clay

Pyroquilon/Actara core GR (4.7+2.4):

4.7wt% of Pyroquilon,

2.4wt% of Thiamethoxam,

50wt% of AX Clay,

3.0wt% of SH-502,

5.0wt% of Amycol C (pregelatinized starch) and 34.9wt% ofNeoraito Clay.

Pyroquilon/Actara core GR (32.2+3.3):

32.2wt% of Pyroquilon,

3.3wt% of Thiamethoxam,

30wt% of AX Clay,

3.0wt% of SH-502,

5.0wt% of Amycol C (pregelatinized starch) and

26.5wt% of Neoraito Clay.

Pyroquilon/Actara core GR (9.4+2.4):

Rod-like granules having a diamter of about 1 mm and a length of about 3mm, consisting of

9.4wt% of Pyroquilon,

2.4wt% of Thiamethoxam,

50wt% of AX Clay,

3.0wt% of SH-502,

5.0wt% of Amycol C (pregelatinized starch) and

30.2wt% of Neoraito Clay.

Pyroquilon/Actara core GR (26.3+3.3):

26.3wt% of Pyroquilon,

3.3wt% of Thiamethoxam,

30wt% of AX Clay,

3.0wt% of SH-502,

5.0wt% of Amycol C (pregelatinized starch) and

32.4wt% of Neoraito Clay.

Pyroquilon core GR 63.1 :

Rod-like granules having a diamter of about 1 mm and a length of about 3mm, consisting of 63.1 wt% of Pyroquilon,

0.1 wt% of SORPOL5115, (Alkenyl sulfonate) a product of TOHO CHEMICAL INDUSTRY CO., LTD., 5.0wt% of Amycol H (pregelatinized starch), a product of NIPPON STARCH CHEMICAL Co.,

Ltd. and 31.8wt% ofNeoraito Clay.

Thiamethoxam core GR 5.1 :

5.1 wt% of Thiamethoxam,

0.1wt% of SORPOL5115

15wt% of Zeclite SGW,

5.0wt% of Amycol H (pregelatinized starch) and

74.8wt% of Neoraito Clay.

Pyroquilon/Actara core GR (3.8+3.8):

3.8wt% of Pyroquilon,

3.8wt% of Thiamethoxam,

0.1wt% of SORPOL5115,

15wt% of Zeclite SGW,

5.0wt% of Amycol C (pregelatinized starch) and

72.3wt% of Neoraito Clay.

All the above granules are products of Novartis Agro KK.

PVAc: Polyvinylacetate

SH-502: a PVAc 50% Emulsion, a product of Showa Kobunshi Co.

Moresco white P-70: a liquid paraffin, a product of Matsumura Oil Co.

Talcum TA: talcum, a product of KUNIMINE INDUSTRIES Co., Ltd.

Example 1 (Preparation Example)

(1) 890g of Bion/Actara core GR (2.5+2.5) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(2) Then, 5g of Moresco white P-70 are added. (3) Subsequently, 100g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(4) The step (3) is repeated twice.

(5) Then, 5g of Talcum TA are added.

(6) Finally, the thus obtained doubly coated Bion/Actara core GR (2.5+2.5) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a mixture of fast-releasing coated solid pesticides having the following composition is produced:

Overall coating layer thickness 50μm

Bion/Actara core GR (2.5+2.5) 89.0wt%

Liquid paraffin 0.5wt%

PVAc 10wt%

Talcum 0.5wt%

(7) Next, 660g of Bion/Actara core GR (3.3+3.3) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(8) Then, 5g of Moresco white P-70 are added.

(9) Subsequently, 82g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(10) The step (9) is repeated 8 times.

(11) Then, 5g of Talcum TA are added.

(12) Finally, the thus obtained 8 times coated Bion/Actara core GR (3.3+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a mixture of corresponding slow-releasing coated solid pesticides having the following composition is produced:

Overall coating layer thickness 150μm

Bion/Actara core GR (3.3+3.3) 66.0wt%

Liquid paraffin 0.5wt%

PVAc 33wt%

Talcum 0.5wt% (13) The above prepared mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 1 :1 to thereby obtain a composition of the instant invention having two active ingredients.

Example 2 (Preparation Example)

A composition is produced in the same manner as in Example 1 except that the mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 6:4.

Example 3 (Preparation Example)

A composition is produced in the same manner as in Example 1 except that the mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 4:6.

Example 4 (Preparation Example)

(1) 890g of Pyroquilon/Actara core GR (2.4+2.4) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(2) Then, 5g of Moresco white P-70 are added.

(3) Subsequently, 67g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(4) The step (3) is repeated three times.

(5) Then, 5g of Talcum TA are added.

(6) Finally, the thus obtained triply coated Pyroquilon/Actara core GR (2.4+2.4) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a mixture of fast-releasing coated pesticides having the following composition is produced:

Overall coating layer thickness 50μm

Pyroquilon/Actara core GR (2.4+2.4) 89.0wt%

Liquid paraffin 0.5wt% PVAc 10wt%

Talcum 0.5wt%

(7) Next, 640g of Pyroquilon/Actara core GR (36.5+3.3) are charged into an Onion pan which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(8) Then, 5g of Moresco white are added.

(9) Subsequently, 140g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(10) Then 70g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(11 ) The step (10) is repeated four times.

(12) Then, 2.5g of Talcum are added.

(13) The thus obtained 5 times coated Pyroquilon/Actara core GR (36.5+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

(14) The above 5 times coated Pyroquilon/Actara core GR (36.5+3.3) is again charged into the Onion pan which roateates constantly at a speed of about 20rpm.

(15) Subsequently, 70g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(16) The step (15) is repeated four times.

(17) Then, 2.5g of Talcum are added.

(18) The thus obtained 9 times coated Pyroquilon/Actara core GR (36.5+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a mixture of slow-releasing coated pesticides having the following composition is produced:

Overall coating layer thickness 150μm

Pyroquilon/Actara core GR (36.5+3.3) 64.0wt%

Liquid paraffin 0.5wt%

PVAc 35wt%

Talcum 0.5wt%

(18) The above prepared mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 1 :1 to thereby obtain a composition of the instant invention having two active ingredients. Example 5 (Preparation Example)

(1) 890g of Pyroquilon/Actara core GR (4.7+2.4) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(2) Then, 5g of Moresco white P-70 are added.

(4) The step (3) is repeated three times.

(5) Then, 5g of Talcum TA are added.

(6) Finally, the thus obtained triply coated Pyroquilon/Actara core GR (4.7+2.4) is subjected to post drying under the conditions of 60°C in inlet air temperature and over50°C in outlet air temperature.

Overall coating layer thickness 50μm

Pyroquilon/Actara core GR (4.7+2.4) 89.0wt%

Liquid paraffin 0.5wt%

PVAc 10wt%

Talcum 0.5wt%

(7) 640g of Pyroquilon/Actara core GR (32.2+3.3) are charged into an Onion pan which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(8) Then, 5g of Moresco white are added.

(11 ) The step (10) is repeated four times.

(12) Then, 2.5g of Talcum are added.

(13) The thus obtained 5 times coated Pyroquilon/Actara core GR (32.2+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

(14) The above dried 5 times coated Pyroquilon/Actara core GR (32.2+3.3) is again charged into the Onion pan which roateate constantly at a speed of about 20rpm. (15) Subsequently, 70g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(16) The step (15) is repeated four times.

(17) Then, 2.5g of Talcum are added.

(18) The thus obtained 9 times coated Pyroquilon/Actara core GR (32.2+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Overall coating layer thickness 150μm

Pyroquilon/Actara core GR (32.2+3.3) 64.0wt%

Liquid paraffin 0.5wt%

PVAc 35wt%

Talcum 0.5wt%

(18) The above prepared mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 1 :1 to thereby obtain a composition of the instant invention having two active ingredients.

Example 6 (Preparation Example)

(1) 890g of Pyroquilon/Actara core GR (9.4+2.4) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(2) Then, 5g of Moresco white P-70 are added.

(4) The step (3) is repeated three times.

(5) Then, 5g of Talcum TA are added.

(6) Finally, the thus obtained triply coated Pyroquilon/Actara core GR (9.4+2.4) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Overall coating layer thickness 50μm Pyroquilon/Actara core GR (9.4+2.4) 89.0wt%

Liquid paraffin 0.5wt%

PVAc 10wt%

Talcum 0.5wt%

(7) 640g of Pyroquilon/Actara core GR (26.3+3.3) are charged into an Onion pan which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(8) Then, 5g of Moresco white are added.

(11 ) The step (10) is repeated four times.

(12) Then, 2.5g of Talcum are added.

(13) This obtained 5 times coated Pyroquilon/Actara core GR (26.3+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

(14) The above dried 5 times coated Pyroquilon/Actara core GR (26.3+3.3) GR is again charged into an Onion pan which roatates constantly at a speed of about 20rpm.

(16) The step (15) is repeated four times.

(17) Then, 2.5g of Talcum are added.

(18) The thus obtained 9 times coated Pyroquilon/Actara core GR (26.3+3.3) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Overall coating layer thickness 150μm

Pyroquilon/Actara core GR (26.3+3.3) 64.0wt%

Liquid paraffin 0.5wt%

PVAc 35wt%

Talcum 0.5wt% (19) The above prepared mixture of fast-releasing coated pesticides and that of slow-releasing coated pesticides are mixed at a weight ratio of 1 :1 to thereby obtain a composition of the instant invention having two active ingredients.

-Example 7 (Preparation Example)

(1) 890g of Pyroquilon/Actara core GR (3.8+3.8) are charged into an Onion pan (manufactured by Hata Tekkosho Co.), which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(2) Then, 20g of Moresco white P-70 are added.

(3) Subsequently, 107g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(4) The step (3) is repeated two times.

(5) Then, 5g of Talcum TA are added.

(6) Finally, the thus obtained two times coated Pyroquilon/Actara core GR (3.8+3.8) is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Overall coating layer thickness 50μm

Pyroquilon/Actara core GR (3.8+3.8) 87.5wt%

Liquid paraffin 2.0wt%

PVAc 10wt%

Talcum 0.5wt%

(7) 640g of Pyroquilon core GR 63.1 are charged into an Onion pan which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(8) Then, 22g of Moresco white are added.

(9) Subsequently, 94g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(10) The step (9) is repeated four times.

(11 ) Then, 2g of Talcum are added.

(12) This obtained 4 times coated Pyroquilon core GR 63.1 is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature. (13) The above dried 4 times coated Pyroquilon core GR 63.1 is again charged into an Onion pan which roatates constantly at a speed of about 20rpm.

(14) Subsequently, 94g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(15) The step (14) is repeated three times.

(16) Then, 2g of Talcum are added.

(17) The thus obtained 7 times coated Pyroquilon core GR 63.1 is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

(18) The above dried 7 times coated Pyroquilon core GR 63.1 is again charged into an Onion pan which roatates constantly at a speed of about 20rpm.

(19) Subsequently, 94g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(20) The step (19) is repeated three times.

(21 ) Then, 1 g of Talcum are added.

(22) The thus obtained ten times coated Pyroquilon core GR 63.1 is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a slow-releasing coated pesticides having the following composition is produced: Overall coating layer thickness 150μm

Pyroquilon core GR 63.1 57.5wt%

Liquid paraffin 2.0wt%

PVAc 40wt%

Talcum 0.5wt%

(23) 640g of Thiamethoxam core GR 5.1 are charged into an Onion pan which pan thereafter is allowed to rotate constantly at a speed of about 20rpm.

(24) Then, 20g of Moresco white are added.

(25) Subsequently, 73g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(26) The step (25) is repeated three times.

(27) Then, 2g of Talcum are added.

(28) The above dried 3 times coated Thimethoxam core GR 5.1 is again charged into an Onion pan which roatates constantly at a speed of about 20rpm. (29) Subsequently, 73g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(30) The step (29) is repeated three times.

(31 ) Then, 2g of Talcum are added.

(32) The thus obtained 6 times coated Thimethoxam core GR 5.1 is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

(33) The above dried 6 times coated Thimethoxam core GR 5.1 is again charged into an Onion pan which roatates constantly at a speed of about 20rpm.

(34) Subsequently, 73g of SH-502 are added, followed by drying with air blow 0.6m³/min, 25°C dried air for 5 to 15 minutes.

(35) The step (34) is repeated three times.

(36) Then, 1 g of Talcum are added.

(37) The thus obtained 9 times coated Thimethoxam core GR 5.1 is subjected to post drying under the conditions of 60°C in inlet air temperature and over 50°C in outlet air temperature.

Thus a slow-releasing coated pesticides having the following composition is produced: Overall coating layer thickness 120μm

Thiamethoxam core GR 5.1 64.5wt%

Liquid paraffin 2.0wt%

PVAc 33wt%

Talcum 0.5wt%

The above prepared mixture of fast-releasing coated pesticides and solo of two slow-releasing coated pesticides are mixed at a weight ratio of 1 :1 :1 to thereby obtain a composition of the instant invention having two active ingredients.

Example 8 (Release Test)

(1 ) 1000ml of water having a German hardness of 3 degrees are placed in a 1000ml stopped flask, to which 250mg of the pesticides prepared in step (6) or (1 ) of Example 1 , or 250mg of the pesticides prepared in step (6) or (17) of Example 4 are added. The temperature of said water is kept at 25 +-2°C. If some granules are floating on the surface of the water, they are sunk down to the bottom of the flask. (2) Three days after preparation of the above test system, 10ml of the liquid are pipetted therefrom using a 10ml hole pipette, then transferred into a stopped centrifugation tube. When pipetting the liquid, the tip of the hole pipette is positioned at the medium point between the surface of the liquid and the bottom of the flask. After pipetting the liquid, 10ml of water having a German hardness of 3 degrees are added to the test system. If some granules are floating or flocculating in the liquid transferred to the centrifugation tube, it is centrifuged in order to sediment the granules.

(3) The liquid transferred into the centrifugation tube is then subjected to HPLC and/or GLC analysis in order to determine the pestcidal active ingredient concentration in the liquid. This determination is carried out for each active ingredient.

(4) The steps (2)-(3) are repeated 1 , 3, 7, 14, 21 , 28, 36, 42, 50, 56, 63, 71 , 77, 80, 101 and 133 days after preparation of the test system.

The results are shown in Table 1.

Example 9 (Release Test)

Experiments are carried out in the same manner as in Example 8 except that 250mg of the composition of step (13) of Example 1 is used instead of the pesticides prepared in step (6) or (12) of Example 1 or the pesticides prepared in step (6) or (17) of Example 4, that the release tests are carried out at 25°C and 15°C, that steps (2)-(3) of Example 7 are repeated 1 , 3, 7, 14, 28, 42, 56, 71 , 80 and 101 days after preparation of the test systems, and that only the concetrations of Thiamethoxam are determined.

The results are shown in Table 2.

Table 1 Results of release test

Table 2 Results of release test

As can be seen from the results of Table 1 obtained from Example 8, it is obvious that the instant invention achieves constant release of active ingredient(s) under rising temperature conditions. For example, the fast-releasing pesticides of Example 4 (10% coat) complete the release of Pyroquilon in 14 days, whilst the slow-releasing pesticides of the same Example (35% coating) only release 25% of Pyroquilon in 14 days at 25°C. If the temperature rises to a temperature higher than 25°C in 14 days, it is expected that the fast-releasing pesticides complete the release of Pyroquilon within a time shorter than 14 days before the temperature reaches the above temperature. However, it is expected that the release of Pyroquilon from the slow-releasing pesticides during the time in which the fast-releasing pesticides complete the release of Pyroquilon is practically negligiable as compared to that of the fast-releasing pesticides, and that the release rate of Pyroquilon from the slow-releasing pesticides increases at elevated temperatures after completion of release from the fast-releasing pesticides. Therefore, it is apparent that the instant invention achieves constant release of active ingredient(s) even under rising temperature conditions. The same can be expected from the results of release behaviour of Acibenzolar-S-Methyl and Thiamethoxam.

Example 9 is carried out in order to prove the above expectation using the composition of Example 1 , which composition is composed of the fast-releasing and slow-releasing pesticides where active ingredients are Acibenzolar-S-Methyl and Thiamethoxam. As Table 2 shows, the release rate of Thiamethoxam at 25°C is about twice as large as that at 15°C. However, the release rate during the first two weeks is about twice as larger as that during the third to fourth weeks both at 15°C and 25°C. Therefore, if the temperature remains 15°C during the first two weeks after application of the composition of Example 1 and then suddenly rises up to 25°C, the release rate is 8% for the first week, 7% for the second week, 12% for the third week, 10% for the fourth and fifth weeks, 8.5% for the sixth and seventh weeks, and 8% for the eighth and ninth weeks. These results clearly demonstrate that the composition according to the instant invention enables well controlled release of active ingredients under rising temperature conditions.

Furthermore, as the results from Pyroquilon in Table 1 indicates, the composition of the instant invention is also suited to applications where the release rate of active ingredient(s) need to be high at the initial stage but low and long-lasting afterwards. As described above, due to its excellent release controllability the composition of the instant invention is an indispensible pesticidal composition for the current and future agriculture and horticulture where further reduction of labor of farmers is required.

Claims

What is claimed is:

1 . A pesticidal composition, comprising:

(1) a slow-releasing coated solid pesticide, comprising a pesticidal active ingredient which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer and

(2) a fast-releasing coated solid pesticide, comprising the same active ingredient as that of the above pesticide (1 ) which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer, characterized in that the slow-releasing and fast-releasing properties are controlled only by adjusting the contents of said thermoplastic polymer, only by adjusting the contents of said active ingredient, or by adjusting the contents of said thermoplastic polymer and contents of said active ingredient.

2. A pesticidal composition according to claim 1 , wherein said pesticidal active ingredient is selected from the group consisting of herbicides, fungicides, insecticides, plant growth regulators and plant activators.

3. A pesticidal composition according to claim 1 , wherein said pesticidal active ingredient is Acibenzolar-S-methyl, Fludioxonil, Pyroquilon, Thiamethoxam, Thiocyclam, Pymetrozine, Pretilachlor or Cinosulfuron

4. A pesticidal composition according to claim 1 , wherein said water-emulsifiable polymer is polyvinyl acetate.

5. A pesticidal composition according to claim 1 , wherein the slow-releasing and fast-releasing properties are controlled by adjusting the contents of said thermoplastic polymer.

6. A pesticidal composition according to claim 5, wherein the content of said thermoplastic polymer is 15-50wt% for pesticide (1) based on the total weight of pesticide (1) and 1-20wt% for pesticide (2) based on the total weight of pesticide (2).

7. A pesticidal composition according to claim 1 , wherein the slow-releasing and fast-releasing properties are controlled by adjusting the contentss of said thermoplastic polymer and contents of said active ingredient.

8.A pesticidal composition according to claim 7, wherein the content of said thermoplastic polymer is 15-50wt% for pesticide (1 ) based on the total weight of pesticide (1 ) and 1 -20wt% for pesticide (2) based on the total weight of pesticide (2), and the content of active ingredient of pesticides (1) and (2) is chosen within a range of 1-50wt% based on the total weight of the granules or powders of respective pesticides (1 ) and (2).

9. A pesticidal composition according to claim 1 , which further comprises

(1)' another slow-releasing coated solid pesticide, comprising another pesticidal active ingredient (hereinafter, referred to as "another active ingredient") which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer and

(2)' another fast-releasing coated solid pesticide, comprising "another active ingredient" which is formulated together with an inert carrier and a surfactant into granules or powder, which granules or powder are coated with a water-emulsifiable thermoplastic polymer, characterized in that the slow-releasing and fast-releasing properties are controlled only by adjusting the contents of said thermoplastic polymer, only by adjusting the contents of "another active ingredient", or by adjusting the contents of said thermoplastic polymer and contents of said "another active ingredient'.

10. A pesticidal composition according to claim 9, wherein said "another pesticidal active ingredient" is selected from the group consisting of herbicides, fungicides and insecticides.

11. A pesticidal composition according to claim 9, wherein said "another pesticidal active ingredient" is Acibenzolar-S-methyl, Fludioxonil, Pyroquilon, Thiamethoxam, Thiocyclam, Pimetrozine, Pretilachlor or Cinosulflon

12. A pesticidal composition according to claim 9, wherein said water-emulsifiable polymer is polyvinyl acetate.

13. A pesticidal composition according to claim 9, wherein the slow-releasing and fast-releasing properties are controlled by adjusting the contents of said thermoplastic polymer.

14. A pesticidal composition according to claim 13, wherein the content of said thermoplastic polymer is 15-50wt% for pesticide (1 )' based on the total weight of pesticide (1 )' and 1 -20wt% for pesticide (2)' based on the total weight of pesticide (2)'.

15. A pesticidal composition according to claim 9, wherein the slow-releasing and fast-releasing properties are controlled by adjusting the contents of said thermoplastic polymer and contents of said "another active ingredient".

16.A pesticidal composition according to claim 15, wherein the content of said thermoplastic polymer is 15-50wt% for pesticide (1 )' based on the total weight of pesticide (1 )' and 1 -20wt% for pesticide (2)' based on the total weight of pesticide (2)', and the content of "another active ingredient" of pesticides (1 )' and (2)' is chosen within a range of 1 -50wt% based on the total weight of the granules or powders of respective pesticides (1 )' and (2)'.