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WO2016079035A1 - Utilisation de certaines combinaisons d'herbicides dans la culture de plantes à racines tubéreuses - Google Patents

Utilisation de certaines combinaisons d'herbicides dans la culture de plantes à racines tubéreuses Download PDF

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Publication number
WO2016079035A1
WO2016079035A1 PCT/EP2015/076643 EP2015076643W WO2016079035A1 WO 2016079035 A1 WO2016079035 A1 WO 2016079035A1 EP 2015076643 W EP2015076643 W EP 2015076643W WO 2016079035 A1 WO2016079035 A1 WO 2016079035A1
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spp
root crop
tuberous root
herbicides
plants
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PCT/EP2015/076643
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English (en)
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Mohamed ELSHERIF
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Bayer Cropscience Aktiengesellschaft
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Priority to BR112017010398A priority Critical patent/BR112017010398A2/pt
Priority to CN201580073678.5A priority patent/CN107105658A/zh
Publication of WO2016079035A1 publication Critical patent/WO2016079035A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
    • A01N43/68—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms with two or three nitrogen atoms directly attached to ring carbon atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/707—1,2,3- or 1,2,4-triazines; Hydrogenated 1,2,3- or 1,2,4-triazines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2

Definitions

  • the present invention primarily relates to the use of specific herbicide combinations or of a composition comprising specific herbicide combinations for controlling harmful plants in tuberous root crop plants, preferably in cassava.
  • the present invention also relates to the use of specific herbicide combinations or of a composition comprising specific herbicide combinations as plant growth regulators for tuberous root crop plants, preferably as plant growth regulators for cassava.
  • the present invention relates to a corresponding method of controlling harmful plants in tuberous root crop plants and to a corresponding method of regulating plant growth of tuberous root crop plants.
  • Cassava Manihot esculenta Crantz
  • In Africa yields of cassava are generally comparatively low, which to a large extent is due to effects of weed competition or to uncontrolled or unsufficiently controlled weed growth. Hoe-weeding still is a common practice among cassava farmers.
  • CN102428919A teaches a postemergence cassava field herbicide with mesotrion as an active component.
  • CN103392724A suggests the use of a ternary herbicide composition as cassava field herbicide with the active components of halosulfuron, oxyfluorfen and an amide herbicide selected from the group of butachlor, propisochlor and metolachlor.
  • GB 1,028,976 discloses a process for the treatment of plants with storage organs, for example cassava, sweet potato or yam, which comprises spraying the plants with a substituted benzoic acid herbicide in a specific time fram before harvest.
  • a substituted benzoic acid herbicide in a specific time fram before harvest.
  • herbicides like (optionally further substituted) di-, tri- or tetrachlorobenzoic acids are preferred.
  • African Crop Science Journal 1994, 519-530 reports on weeds and their control in cassava.
  • herbicides were tested: metobromuron, fluometuron, prometryn (optionally in combination with ametryne), terbutryn, paraquat and diuron.
  • Planata Daninha, 2010, 28(4), 807-816 describes the application of different herbicdes on weeds in cassava.
  • Inter alia the effects of herbicides like diuron, metribuzin, isoxaflutole, atrazine, ametryn, and several combinations comprising said herbicides are reported therein on two cassava varieties grown in the state of Parana, Brazil.
  • herbicidal crop protection agents known to date for controlling harmful plants or unwanted vegetation in tuberous root crop plants have some disadvantages, be it (a) that they have no or else insufficient herbicidal activity against specific harmful plants, (b) that the spectrum of hanriful plants which can be controlled with the herbicides is not broad enough, and/or (c) that the selectivity of herbicides in and the compatibility with tuberous root crop plants is too low, thereby causing unwanted damage and/or unwanted reduced harvest yields of the tuberous root crops.
  • the present invention primarily relates to the use of a combination of herbicides (herbicide combination) or of a composition comprising a combination of herbicides (herbicide combination) for controlling harmful plants in tuberous root crop plants, and/or as plant growth regulators in tuberous root crop plants, wherein said combination of herbicides comprises (i) indaziflam and (ii) metribuzin or isoxaflutole.
  • the present invention relates to the above mentioned use, wherein a combination of herbicides is used comprising or consisting of (i) indaziflam and (ii) metribuzin.
  • the present invention further relates to the above mentioned use, wherein a combination of herbicides is used comprising or consisting of (i) indaziflam and (ii) isoxaflutole.
  • the present invention further releates to the use of a composition as defined herein in the context of the present invention which additionally comprises one or more further components selected from the group consisting of formulation auxiliaries, additives customary in crop protection, and further agrochemically active compounds (i.e. agrochemically active compounds different from components (i) and (ii) as defined above, i.e. agrochemically active compounds other than indaziflam, metribuzin and isoxaflutole).
  • agrochemically active compounds i.e. agrochemically active compounds different from components (i) and (ii) as defined above, i.e. agrochemically active compounds other than indaziflam, metribuzin and isoxaflutole.
  • a combination of herbicides used in the context of the present invention consists of herbicides (i) indaziflam and (ii) metribuzin or isoxaflutole
  • further herbicidal active ingredient and “further agrochemically active compound” refers to the herbicides and agrochemically active compounds (pesticides), respectively, listed in "The Pesticide Manual”, 16th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2012 other than indaziflam, metribuzin and isoxaflutole.
  • the herbicide combinations and the compositions comprising said herbicide combinations used in accordance with the present invention not only exhibit an excellent herbicidal activity in controlling harmful plants or unwanted vegetation in tuberous root crop plants, but also show compatibility with tuberous root crop plants, i.e. said herbicides do not cause significant damage and/or unwanted reduced harvest yields of the tuberous root crops.
  • the herbicide combinations used in accordance with the present invention and the compositions comprising said herbicide combinations used in accordance with the present invention allow excellent (total) weed control at an agronomically acceptable level of damage of the tuberous root crop plants. Further, the type of damage observed with the herbicide combinations and the compositions comprising said herbicide combinations used in accordance with the present invention is less harmful and/or less severe, and the tuberous root crop plants affected largely or fully recover from said type of damage.
  • the herbicide combinations used in accordance with the present invention and the compositions comprising said herbicide combinations used in accordance with the present invention can be used as plant growth regulators for tuberous root crop plants, preferably as plant growth regulators for cassava, thereby increasing harvest yields tuberous root crop plants (in particular the weight of the tuberous root) and/or increasing the plant growth of the tuberous root crop plants (in particular the growth of the leaves of the tuberous root crop plants), in each case in comparison to tuberous root crop plants not treated with herbicides (untreated control).
  • the present invention preferably relates to the use of a combination of herbicides or of a composition comprising a combination of herbicides as defined in the context of the present invention, wherein the tuberous root crop plants are selected from the group consisting of sweet potato ⁇ Ipomoea batatas), cassava ⁇ Manihot esculenta), and yam (plant species in the genus Dioscorea), more preferably wherein the tuberous root crop plant is cassava ⁇ Manihot esculenta).
  • the herbicide combinations used in the context of the present invention and also certain compositions comprising the herbicide combinations used in the context of the present invention as such are known.
  • the herbicide combinations used in the context of the present invention and also certain compositions comprising the herbicide combinations used in the context of the present invention are commercially available.
  • Tuberous roots are perennating organs, thickened roots that store nutrients over periods when the plant cannot actively grow, thus permitting survival from one year to the next.
  • Tubers should not be confused with tuberous roots. Tubers are modified shoots, whereas tuberous roots are modified roots.
  • a tuberous root is a modified lateral root, enlarged to function as a storage organ.
  • the enlarged area of the root- tuber, or storage root can be produced at the end or middle of a root or involve the entire root. It is thus different in origin but similar in function and appearance to a stem tuber. Examples of plants with notable tuberous roots include the sweet potato, cassava, yam and dahlia.
  • Cassava ⁇ Manihot esculenta Crantz
  • manioc yuca, balinghoy or kamoteng kahoy (in the Philippines), tabolchu (in Northeast India), mogo (in Africa), mandioca, tapioca-root, kappa (predominantly in India) and manioc root, a woody shrub of the Euphorbiaceae (spurge) family native to South America, is extensively cultivated as an annual crop in tropical and subtropical regions for its edible starchy tuberous root, a major source of carbohydrates.
  • Cassava when dried to a powdery (or pearly) extract, is called tapioca; its fermented, flaky version is named garri.
  • Cassava is the third largest source of food carbohydrates in the tropics, after rice and maize. Cassava is a major staple food in the developing world, providing a basic diet for over half a billion people. It is one of the most drought-tolerant crops, capable of growing on marginal soils. Nigeria is the world's largest producer of cassava, while Thailand is the largest exporting country of dried cassava.
  • Cassava grows poorly in weedy fields and consequently produces fewer and smaller storage roots.
  • Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers. These are perennial herbaceous vines cultivated for the consumption of their starchy tubers in Africa, Asia, Latin America, the Caribbean and Oceania. There are many cultivars of yam. Although some varieties of sweet potato (Ipomoea batatas) are also called am in parts of the United States and Canada, it is not part of the family Dioscoreaceae.
  • Yams are monocotyledons, related to lilies and grasses. Native to Africa and Asia, yam tubers vary in size from that of a small potato to over 60 kilograms. There are over 600 varieties of yams and 95 percent of these crops are grown in Africa.
  • composition includes compositions comprising a herbicide combination as defined herein, and can be used in various acceptable or agronomically typical forms and formulations, for example in a single "ready-mix” form.
  • the herbicides (i) and (ii) used in the herbicide combinations used in the context of the present invention and the compositions comprising the herbicide combinations used in the context of the present invention may be a combined spray mixture composed from separate formulations of the single active compounds, such as a "tank- mix", or said composition can be a combined use of the single active ingredients when applied in a sequential manner, i.e. one after the other within a reasonably short period, such as a few hours (and preferably less than 24 hours).
  • herbicides (i) and (ii) used in the herbicide combinations used in the context of the present invention include all stereoisomers and their mixtures, in particular also racemic mixtures and - if enantiomers are possible - the respective biologically active enantiomer.
  • the short form of the common name of an active compound includes in each case all customary derivatives, such as the esters and salts, and isomers, in particular optical isomers, in particular the commercially available form or forms.
  • the common name denotes an ester or salt
  • this in each case also comprises all other customary derivatives, such as other esters and salts, the free acids and neutral compounds, and isomers, in particular optical isomers, in particular the commercially available form or forms.
  • the given chemical compound names denote at least one of the compounds embraced by the common name, frequently a preferred compound.
  • salts also include the salts formed by exchanging a hydrogen atom on the sulfonamide group by a cation.
  • the salts of compounds used in the context of the present invention may be used in the form of the respective alkali metal salts, alkaline earth salts or ammonium salts, preferably in the form of the respective alkali metal salts, more preferably in the form of the respective sodium or potassium salts, most preferably in the form of the respective sodium salts.
  • Indaziflam (IUPAC-Name: N 2 - [( lR,2S)-2,3 -dihydro-2,6-dimethyl- lH-inden- 1 -yl] -6- [( IRS)- 1 -fluoroethyl] - l,3,5-triazine-2,4-diamine, CAS Reg. No.
  • Isoxaflutole (IUPAC-Name: 5 -cyclopropyl- 1 ,2-oxazol-4-yl)(a,a,a-trifluoro-2-mesyl-p-tolyl)methanone, CAS Reg. No. 141112-29-0) is described for example in EP 0 527 036 Al .
  • Metribuzin (IUPAC-Name: 4-amino-6-ieri-butyl-4,5-dihydro-3-methylthio-l,2,4-triazin-5-one, CAS Reg. No. 21087-64-9) is described for example in DE1795784 Al .
  • US 8,236,729 B2 relates to herbicide combinations, inter alia disclosing indaziflam as herbicide of component (A) and inter alia disclosing isoxaflutole as component (B3.1.15) and metribuzin as component (B2.1.9).
  • the herbicide combinations as defined herein or the composition comprising a herbicide combination as defined herein comprise a herbicidally effective amount of said herbicide combination and may comprise further components, for example agrochemically active compounds of a different type and/or formulation auxiliaires and/or additives customary in crop protection, or they may be employed together with these.
  • the herbicide combinations as defined herein or the composition comprising a herbicide combination as defined herein may be applied as a split application over time.
  • Another possibility is the application of the individual herbicides (i) and (ii) or the herbicide combinations in a plurality of portions (sequential application), for example after pre-emergence applications, followed by post-emergence applications or after early post-emergence applications, followed by applications at medium or late post-emergence.
  • Preferred is the simultaneous or nearly simultaneous application of the herbicides (i) and (ii) as defined herein.
  • a nearly simultaneous application of the herbicides (i) and (ii) as defined herein means that the herbicide (i) indaziflam and the herbicide (ii) metribuzin or isoxaflutole are both applied within 24 hours, preferably within 12 hours, more preferably within 6 hours, even more preferably within 3 hours.
  • the herbicides (i) and (ii) as defined herein are used together, i.e. at the same time.
  • a composition comprising the herbicides (i) and (ii) as defined herein is used.
  • the herbicides (i) and (ii) used in accordance with the present invention or a composition comprising the herbicides (i) and (ii) used in accordance with the present invention are only used once per season. It was found that one application per season of the herbicides (i) and (ii) used in accordance with the present invention or of a composition comprising the herbicides (i) and (ii) used in accordance with the present invention is sufficient to achieve the effects described in the context of the present invention, in particular regarding herbicidal activity (above aspects (a) and (b)) and/or the selectivity / compatibility (above aspect (c)).
  • the herbicides (i) and (ii) used in accordance with the present invention or a composition comprising the herbicides (i) and (ii)used in accordance with the present invention is applied once, twice or three times per Gregorian calendar year, i.e. in one application, in two applications or in three applications per year according to the Gregorian calendar.
  • the herbicides (i) and (ii) used in accordance with the present invention or a composition comprising the herbicides (i) and (ii)used in accordance with the present invention is applied one time per Gregorian calendar year, i.e. in one application per year according to the Gregorian calendar.
  • the herbicides (i) and (ii) used in accordance with the present invention or a composition comprising the herbicides (i) and (ii) used in accordance with the present invention is applied one time in about 12 months, i.e. in one application in about 12 months.
  • the effects observed when using the herbicides (i) and (ii) as defined herein or a composition comprising the herbicides (i) and (ii) as defined herein allow a more potent herbicidal action, the control of hitherto uncontrolable species (activity gaps), an extended application period and/or a reduced number of required individual applications and - as a result for the user - more advantageous weed control systems both from an economical and ecological point of view.
  • the herbicides (i) and (ii) as defined herein or a composition comprising the herbicides (i) and (ii) as defined herein may be used in pre-emergence applications and/or in post-emergence applications.
  • the herbicides (i) and (ii) as defined herein or a composition comprising the herbicides (i) and (ii) as defined herein are used in pre-emergence applications.
  • the total amount by weight of constituent (ii), i.e. metribuzin or isoxaflutole, is used in a higher amount than constituent (i) indaziflam.
  • the ratio by weight of the total amount of (ii) metribuzin or isoxaflutole to the total amount of (i) indaziflam preferably is >1, greater than 1 : 1, more preferably >2, i.e. greater than 2 : 1.
  • the ratio by weight of the total amount of (ii) metribuzin or isoxaflutole to the total amount of (i) indaziflam preferably is in the range of from 2 : 1 to 50 : 1, more preferably in the range of from 3 : 1 to 40 : 1.
  • the ratio by weight of the total amount of (ii) metribuzin to the total amount of (i) indaziflam preferably is in the range of from 3 : 1 to 25 : 1, more preferably in the range of from 4 : 1 to 20 : 1, even more preferably in the range of from 5 : 1 to 15 : 1.
  • the ratio by weight of the total amount of (ii) isoxaflutole to the total amount of (i) indaziflam preferably is in the range of from 3 : 1 to 15 : 1, more preferably in the range of from 3 : 1 to 12 : 1, even more preferably in the range of from 4 : 1 to 10 : 1.
  • the preferred application rates [indicated as g a.i./ha, i.e. grams of active ingredient per hectare] of the herbicides used in the context of the present invention as defined herein are as follows:
  • Indaziflam is preferably applied at a rate in the range of 10 to 200 g a.i./ha, more preferably at a rate in the range of 25 to 100 g a.i./ha, particularly preferably at a rate in the range of 30 to 90 g a.i./ha.
  • Metribuzin is preferably applied at a rate in the range of 100 to 1500 g a.i./ha, more preferably at a rate in the range of 200 to 1250 g a.i./ha, particularly preferably at a rate in the range of 250 to 1000 g a.i./ha.
  • Isoxaflutole is preferably applied at a rate in the range of 10 to 300 g a.i./ha, more preferably at a rate in the range of 20 to 300 g a.i./ha., particularly preferably at a rate in the range of 30 to 250 g a.i./ha.
  • herbicides (i) and (ii) as defined herein can be used together with other agrochemically active compounds, for example from the group of the safeners, fungicides, insecticides, other herbicides and other plant growth regulators, or with formulation auxiliaries and additives customary in crop protection.
  • Additives are, for example, fertilizers and colorants. Preference is in each case given to the ratios by weight mentioned above for indaziflam, metribuzin and isoxaflutole, and the application rates or the application rate ranges mentioned above for indaziflam, metribuzin and isoxaflutole.
  • African Crop Science Joumal 1994, Vol. 2. No.4, pp. 519-530 summarizes the ten most common weed species in cassava fields in Umuahia, southern Nigeria:
  • Ageratum conyzoide Calopogonium mucunoides, Alternenthera sessilis, Boreiria ocymoides, Commelina erecta, Chromolaena odorata, Mimosa invisa, Commelina benghalansis, Tridax procumbens, Brachiaria delfexa, Platostoma africanum, Digitaria adscendens, Synedrella nodiflora, Panicum maximum, Cyperus rotundus, Cyperus esculentus.
  • weed species occurring in cassava fields in Nigeria are (grasses, sedges and broadleaf weeds): Imperata cylindrica, Cynodon dactylon, Pennisetum polystachion, Mariscus alternifolius, Euphorbia heterophylla, Talinum triangulare.
  • a relevant parasitic weed species occurring in cassava fields is Cuscuta australis.
  • the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein have an outstanding herbicidal activity against a broad spectrum of economically important harmful monocotyledonous and dicotyledonous harmful plants in tuberous root crop plants, particularly in cassava.
  • controlling denotes a significant reduction of the growth of the harmful plant(s) in comparison to the untreated harmful plants.
  • the growth of the harmful plant(s) is essentially diminished (60-79%), more preferably the growth of the harmful plant(s) is largely or fully suppressed (80-100%), and in particular the growth of the harmful plant(s) is almost fully or fully suppressed (90-100%).
  • the present invention relates to the use of the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein, wherein one, several or all harmful plants are selected from the group of weed species consisting of Ageratum spp., Calopogonium spp., Altemanthera spp., Boreiria spp., Commelina spp., Chromolaena spp., Mimosa spp., Tridax spp., Brachiaria spp., Platostoma spp., Digitaria spp., Synedrella spp., Panicum spp., Cyperus spp., Imperata spp., Cynodon spp., Pennisetum spp., Mariscus spp., Euphorbia spp., Talinum spp., Pteridium spp., Melinis spp., Si
  • the present invention relates to the use of the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein, wherein one, several or all harmful plants are selected from the group of weed species consisting of Ageratum spp., Calopogonium spp., Altemanthera spp., Boreiria spp., Commelina spp., Chromolaena spp., Mimosa spp., Tridax spp., Brachiaria spp., Platostoma spp., Digitaria spp., Synedrella spp., Panicum spp., Cyperus spp., Imperata spp., Cynodon spp., Pennisetum spp., Mariscus spp., Euphorbia spp., Talinum spp., Pteridium spp., Melinis spp.
  • the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein are used to control one, several or all harmful plants selected from the group of weed species consisting of Ageratum spp., Calopogonium spp., Alternanthera spp., Boreiria spp., Commelina spp., Chromolaena spp., Mimosa spp., Tridax spp., Brachiaria spp., Platostoma spp., Digitaria spp., Synedrella spp., Panicum spp., Cyperus spp., Imperata spp., Cynodon spp., Pennisetum spp., Mariscus spp., Euphorbia spp., Talinum spp., Pteridium spp., Melinis spp., Sida spp., Portula
  • the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein are used to control one, several or all harmful plants selected from the group of weed species consisting of Ageratum spp., Calopogonium spp., Alternanthera spp., Boreiria spp., Commelina spp., Chromolaena spp., Mimosa spp., Tridax spp., Brachiaria spp., Platostoma spp., Digitaria spp., Synedrella spp., Panicum spp., Cyperus spp., Imperata spp., Cynodon spp., Pennisetum spp., Mariscus spp., Euphorbia spp., Talinum spp., Pteridium spp., Melinis spp., Sida spp., Portula
  • examples may be mentioned of some representatives of the monocotyledonous and dicotyledonous weed flora which can be controlled by the combinations according to the present invention.
  • the present invention relates to the use of the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein, wherein one, several or all harmful plants are selected from the group consisting of Ageratum conyzoides, Calopogonium mucunoides, Alternanthera sessilis, Boreiria ocymoides, Commelina erecta, Chromolaena odorata, Mimosa invisa, Commelina benghalensis, Tridax procumbens, Brachiaria delfexa, Platostoma africanum, Digitaria adscendens, Digitaria horizontalis, Synedrella nodiflora, Panicum maximum, Cyperus rotundus, Cyperus esculentus, Imperata cylindrica, Cynodon dactylon, Pennisetum polystachion, Pennisetum purpureum, Pennisetum violaceum
  • the present invention relates to the use of the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein, wherein one, several or all harmful plants are selected from the group consisting oiAgeratum conyzoides, Calopogonium mucunoides, Alternanthera sessilis, Boreiria ocymoides, Commelina erecta, Chromolaena odorata, Mimosa invisa, Commelina benghalensis, Tridax procumbens, Brachiaria delfexa, Platostoma africanum, Digitaria adscendens, Digitaria horizontalis, Synedrella nodiflora, Panicum maximum, Cyperus rotundus, Cyperus esculentus, Imperata cylindrica, Cynodon dactylon, Pennisetum polystachion, Pennisetum purpureum, Pennisetum
  • the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein are used to control one, several or all harmful plants selected from the group consisting oiAgeratum conyzoides, Calopogonium mucunoides, Alternanthera sessilis, Boreiria ocymoides, Commelina erecta, Chromolaena odorata, Mimosa invisa, Commelina benghalensis, Tridax procumbens, Brachiaria delfexa, Platostoma africanum, Digitaria adscendens, Digitaria horizontalis, Synedrella nodiflora, Panicum maximum, Cyperus rotundus, Cyperus esculentus, Imperata cylindrica, Cynodon dactylon, Pennisetum polystachion, Mariscus alternifolius, Euphorbia heterophylla, Euphorbia hirta, Talinum tri
  • the combination of herbicides as defined herein or the composition comprising a combination of herbicides as defined herein are used to control one, several or all harmful plants selected from the group consisting oiAgeratum conyzoides, Calopogonium mucunoides, Alternanthera sessilis, Boreiria ocymoides, Commelina erecta, Chromolaena odorata, Mimosa invisa, Commelina benghalensis, Tridax procumbens, Brachiaria delfexa, Platostoma africanum, Digitaria adscendens, Digitaria horizontalis, Synedrella nodiflora, Panicum maximum, Cyperus rotundus, Cyperus esculentus, Imperata cylindrica, Cynodon dactylon, Pennisetum polystachion, Mariscus alternifolius, Euphorbia heterophylla, Euphorbia hirta, Talinum tri
  • a herbicide combination used according to the present invention or if a composition comprising a herbicide combination used in the context of the present invention is applied to the soil surface before germination, then the weed seedlings are either prevented completely from emerging, or the weeds grow until they have reached the cotyledon stage but then their growth stops, and, eventually, after three to four weeks have elapsed, they die completely.
  • a herbicide combination used according to the present invention or if a composition comprising a herbicide combination used in the context of the present invention is applied post-emergence to the green parts of the plants, growth likewise stops drastically a very short time after the treatment and the weed plants remain at the growth stage of the point of time of application, or they die completely after a certain time, so that in this manner competition by the weeds, which is harmful to the crop plants, is eliminated at a very early point in time and in a sustained manner.
  • the use of a herbicide combination used according to the present invention and the use of a composition comprising a herbicide combination used in the context of the present invention is characterized by a rapidly commencing and long-lasting herbicidal action.
  • compositions according to the present invention have outstanding growth-regulatory properties on the crop plants. They engage in the plants' metabolism in a regulatory manner and can thus be employed for provoking directed effects on plant constituents and to facilitate harvesting such as for example by triggering desiccation and stunted growth. Moreover, they are also suitable for the general control and inhibition of undesired vegetative growth without simultaneously destroying the plants. An inhibition of vegetative growth is very important in a large number of monocotyledonous and dicotyledonous crops since yield losses as a result of lodging can thus be reduced, or prevented completely.
  • compositions according to the present invention can be employed for controlling harmful plants in genetically modified crop plants or crop plants obtained by mutation/selection.
  • crop plants are distinguished as a rule by particular, advantageous properties, such as resistances to herbicidal compositions or resistances to plant diseases or causative agents of plant diseases such as particular insects or microorganisms such as fungi, bacteria or viruses.
  • advantageous properties relate, for example, to the harvested material with regard to quantity, quality, storability, composition and specific constituents.
  • transgenic plants are known whose starch content is increased or whose starch quality is altered, or those where the harvested material has a different fatty acid composition.
  • the tuberous root crop plants can also have been genetically modified or been obtained by mutation selection.
  • WO 97/44473 Al relates to transforming and producing cassava plant (protoplasts).
  • WO 92/05259 Al descibes transgenic plants having modified carbohydrate content, inter alia cassava plants.
  • the present invention also relates to a method of controlling undesired vegetation (e.g. harmful plants) in tuberous root crop plants, which comprises applying a herbicide combination and compositions as defined in the context of the present invention or applying a composition comprising a herbicide combination as defined in the context of the present invention, for example by the pre-emergence method, by the post-emergence method or by the pre-emergence and the post-emergence method, to the plants, for example harmful plants, parts of these plants, plant seeds or the area where the plants grow, for example the area under cultivation.
  • a herbicide combination and compositions as defined in the context of the present invention or applying a composition comprising a herbicide combination as defined in the context of the present invention, for example by the pre-emergence method, by the post-emergence method or by the pre-emergence and the post-emergence method, to the plants, for example harmful plants, parts of these plants, plant seeds or the area where the plants grow, for example the area under cultivation.
  • the present invention relates to a method for controlling undesired plant growth, and/or controlling harmful plants in tuberous root crop plants, and/or regulating plant growth in tuberous root crop plants, comprising the step of applying a combination of herbicides or a composition comprising a combination of herbicides as defined hereinabove onto the tuberous root crop plants, parts of tuberous root crop plants, seeds of tuberous root crop plants, the area where the tuberous root crop plants grow or the area where the tuberous root crop plants are intended to grow.
  • the tuberous root crop plants are selected from the group consisting of sweet potato (Ipomoea batatas), cassava (Manihot esculenta), and yam (plant species in the genus Dioscorea), more preferably the tuberous root crop plant is cassava ⁇ Manihot esculenta).
  • the present invention relates to a method according to the present invention as defined above, wherein one, several, or all harmful plants as mentioned above are controlled.
  • the present invention relates to a method according to the present invention as defined abov, wherein the tuberous root crop plants have been genetically modified, preferably said tuberous root crop plants are transgenic plants or obtained by mutation/selection.
  • the herbicide combinations as defined in the context of the present invention can not only be used as mixed formulations, if appropriate together with further agrochemically active compounds, additives and/or customary formulation auxiliaries, which are then applied in the customary manner as a dilution with water, but also as so-called tank mixes by jointly diluting the separately formulated, or partially separately formulated, components with water.
  • the herbicide combinations as defined in the context of the present invention and the compositions comprising a herbicide combination as defined in the context of the present invention can be formulated in various ways, depending on the prevailing biological and/or chemical-physical parameters.
  • combinations with other agrochemically active substances such as other herbicides not belonging to constituents (i) and (ii) as defined in the context of the present invention, fungicides or insecticides, and with safeners, fertilizers and/or growth regulators, may also be prepared, for example in the form of a readymix or a tank mix.
  • Wettable powders are products which are uniformly dispersible in water and which, besides the active compound, also comprise ionic or nonionic surfactants (wetters, dispersants), for example polyoxethylated alkylphenols, polyethoxylated fatty alcohols or fatty amines, alkanesulfonates or alkylbenzenesulfonates, sodium lignosulfonate, sodium 2,2'-dinaphthylmethane-6,6'-disulfonate, sodium dibutylnaphthalenesulfonate or else sodium oleoylmethyltauride, in addition to a diluent or inert material.
  • ionic or nonionic surfactants for example polyoxethylated alkylphenols, polyethoxylated fatty alcohols or fatty amines, alkanesulfonates or alkylbenzenesulfonates, sodium lignosulfonate
  • Emulsifiable concentrates are prepared by dissolving the active compound in an organic solvent, for example butanol, cyclohexanone, dimethylformamide, xylene or else higher-boiling aromatics or hydrocarbons with addition of one or more ionic or nonionic surfactants (emulsifiers).
  • organic solvent for example butanol, cyclohexanone, dimethylformamide, xylene or else higher-boiling aromatics or hydrocarbons with addition of one or more ionic or nonionic surfactants (emulsifiers).
  • emulsifiers which may be used are: calcium salts of alkylarylsulfonic acids, such as calcium dodecylbenzene sulfonate, or nonionic emulsifiers such as fatty acid polyglycol esters, alkylaryl polyglycol ethers, fatty alcohol polyglycol ethers, propylene oxide/ethylene oxide condensates, alkyl poly ethers, sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters or polyoxethylene sorbitol esters. Dusts are obtained by grinding the active compound with finely divided solid materials, for example talc, natural clays such as kaolin, bentonite and pyrophyllite, or diatomaceous earth.
  • alkylarylsulfonic acids such as calcium dodecylbenzene sulfonate
  • nonionic emulsifiers such as fatty acid polyglycol esters, alkylaryl polyglycol
  • SC Suspension concentrates
  • Emulsions for example oil-in-water emulsions (EW)
  • EW oil-in-water emulsions
  • Granules can be prepared either by spraying the active compound onto adsorptive, granulated inert material or by applying active compound concentrates to the surface of carriers such as sand, kaolinites or granulated inert material with the aid of binders, for example polyvinyl alcohol, sodium polyacrylate or else mineral oils.
  • Suitable active compounds may also be granulated in the manner conventionally used for the production of fertilizer granules, if desired in a mixture with fertilizers.
  • water-dispersible granules are prepared by customary processes such as spray drying, fluidized-bed granulation, disk granulation, mixing with high-speed mixers and extrusion without solid inert material.
  • the agrochemical formulations comprise 1 to 95% by weight, of active compounds, the following concentrations being customary, depending on the type of formulation:
  • the active compound concentration in wettable powders is, for example, approximately 10 to 95% by weight, the remainder to 100% by weight being composed of customary formulation constituents. In the case of emulsifiable concentrates, the active compound concentration may amount to, for example, 5 to 80% by weight.
  • Formulations in the form of dusts comprise, in most cases, 5 to 20% by weight of active compound, sprayable solutions approximately 0.2 to 25% by weight of active compound.
  • the active compound content depends partly on whether the active compound is present in liquid or solid form and on which granulation auxiliaries and fillers are being used. As a rule, the content amounts to between 10 and 90% by weight in the case of the water-dispersible granules.
  • the abovementioned active compound formulations may comprise, if appropriate, the conventional adhesives, wetters, dispersants, emulsifiers, preservatives, antifreeze agents, solvents, fillers, colorants, carriers, antifoams, evaporation inhibitors, pH regulators or viscosity regulators.
  • the herbicidal action of the herbicide combinations according to the present invention can be improved, for example, by surfactants, preferably by wetters from the group of the fatty alcohol polyglycol ethers.
  • the fatty alcohol polyglycol ethers preferable contain 10 - 18 carbon atoms in the fatty alcohol radical and 2 - 20 ethylene oxide units in the polyglycol ether moiety.
  • the fatty alcohol polyglycol ethers can be nonionic or ionic, for example in the form of fatty alcohol polyglycol ethers sulfates, which can be used, for example, as alkali metal salts (e.g.
  • Nonionic fatty alcohol polyglycol ethers are, for example, (Cio-Cis)-, preferably (Cio-Ci4)-fatty alkohol polyglycol ethers containing 2 - 20, preferably 3 - 15, ethylene oxide units (e.g. isotridecyl alcohol polyglycol ether), for example from the Genapol ® series, such as Genapol ® X-030, Genapol ® X-060, Genapol ® X-080 or Genapol ® X-150 (all from Clariant GmbH).
  • Genapol ® series such as Genapol ® X-030, Genapol ® X-060, Genapol ® X-080 or Genapol ® X-150 (all from Clariant GmbH).
  • the present invention furthermore embraces the combination of herbicides (i) and (ii) as defined above with the wetting agents mentioned above from the group of the fatty alcohol polyglycolethers which preferably contain 10 - 18 carbon atoms in the fatty alcohol radical and 2 - 20 ethylene oxide units in the polyglycol ether moiety and which can be present in nonionic or ionic form (for example as fatty alcohol polyglycol ether sulfates).
  • C Cw-fatty alcohol diglycol ether sulfate sodium (Genapol ® LRO, Clariant); and isotridecyl alcohol polyglycol ether with 3 - 15 ethylene oxide units, for example from the Genapol ® X series, such as Genapol ® X-030, Genapol ® X-060, Genapol ® X-080 or Genapol ® X-150 (all from Clariant GmbH).
  • fatty alcohol polyglycol ethers such as nonionic or ionic fatty alcohol polyglycol ethers (for example fatty alcohol polyglycol ether sulfates) are also suitable for use as penetrants and activity enhancers for a number of other herbicides, inter alia also for herbicides from the group of the imidazolinones (see, for example, EP-A-0502014).
  • fatty alcohol polyglycol ethers such as nonionic or ionic fatty alcohol polyglycol ethers (for example fatty alcohol polyglycol ether sulfates) are also suitable as penetrants and synergists for a number of other herbicides, inter alia also herbicides from the group of the imidazolinones; (see, for example, EP-A-0502014).
  • the herbicidal effect of the herbicide combinations according to the present invention can also be increased using vegetable oils.
  • vegetable oils is to be understood as meaning oils from oil-plant species, such as soya oil, rapeseed oil, corn oil, sunflower oil, cottonseed oil, linseed oil, coconut oil, palm oil, safflower oil or castor oil, in particular rapeseed oil, and their transesterification products, for example alkyl esters, such as rapeseed oil methyl ester or rapeseed oil ethyl ester.
  • the vegetable oils are preferably esters of C10-C22-, preferably C12-C20- fatty acids.
  • the Cio-C22-fatty acid esters are, for example, esters of unsaturated or saturated Cio-C22-fatty acids, in particular those with an even number of carbon atoms, for example erucic acid, lauric acid, palmitic acid and, in particular, Ci8-fatty acids such as stearic acid, oleic acid, linoleic acid or linolenic acid.
  • Ci-C2o-alkyl-Cio-C22-fatty acid esters are the methyl, ethyl, propyl, butyl, 2-ethylhexyl and dodecyl esters.
  • Preferred glycol- and glycerol-Cio-C22-fatty acid esters are the uniform or mixed glycol esters and glycerol esters of C io-C22-fatty acids, in particular those fatty acids which have an even number of carbon atoms, for example erucic acid, lauric acid, palmitic acid and, in particular, Ci8-fatty acids such as stearic acid, oleic acid, linolic acid or linolenic acid.
  • the vegetable oils can be present in the herbicidal compositions according to the present invention for example in the form of commercially available oil-containing formulation additives, in particular those based on rapeseed oil such as Hasten ® (Victorian Chemical Company, Australia, hereinbelow termed Hasten, main constituent: rapeseed oil ethyl ester), Actirob ® B (Novance, France, hereinbelow termed ActirobB, main constituent: rapeseed oil methyl ester), Rako-Binol ® (Bayer AG, Germany, termed Rako-Binol hereinbelow, main constituent: rapeseed oil), Renol ® (Stefes, Germany, termed Renol hereinbelow, vegetable oil constituent: rapeseed oil methyl ester), or Stefes Mero ® (Stefes, Germany, hereinbelow termed Mero, main constituent: rapeseed oil methyl ester).
  • Hasten Vanic
  • the present invention embraces the combination of a herbicide combination as defined in the context of the present invention with the vegetable oils mentioned above.
  • the present invention embraces the use of compositions comprising a herbicide combination as defined in the context of the present invention comprising the vegetable oils mentioned above, such as rapeseed oil, preferably in the form of commercially available oil-containing formulation additives, in particular those based on rapeseed oil such as Hasten ® (Victorian Chemical Company, Australia, hereinbelow termed Hasten, main constituent: rapeseed oil ethyl ester), Actirob ® B (Novance, France, hereinbelow termed ActirobB, main constituent: rapeseed oil methyl ester), Rako-Binol ® (Bayer AG, Germany, termed Rako-Binol hereinbelow, main constituent: rapeseed oil), Renol ® (Stefes, Germany, termed Renol
  • the formulations which are present in commercially available form, are optionally diluted in the customary manner, for example using water in the case of wettable powders, emulsifiable concentrates, dispersions and water-dispersible granules.
  • Preparations in the form of dusts, soil granules, granules for broadcasting and sprayable solutions are usually not diluted further with other inert substances prior to use.
  • the active compounds can be applied to the plants, parts of the plants, seeds of the plants or the area under cultivation (soil of a field), preferably to the green plants and parts of the plants and, if appropriate, additionally to the soil of the field.
  • a composition comprising a herbicide combination used in the context of the present invention has the advantage of being easier to apply, and the quantities of the components are advantageously already presented in the correct ratio to each other. Moreover, the adjuvants in the formulation can be matched optimally to each other.
  • Product PI contained 750 g/kg of isoxaflutole
  • Product P2 contained 150 g/L of indaziflam and 450 g/L of isoxaflutole
  • Product P3 contained 480 g/L of metribuzin
  • Product P4 contained 37.5 g/L of indaziflam and 480 g/L of metribuzin 2.
  • Tables 1 and 2 show the respective total weed control ratings for the different products tested in pre-emergence 6 weeks and 8 weeks after treatment. In each case the total weed control takes into account the control of broad- leaved species, grasses and sedges.
  • Table 5 shows the plant growth regulating effects of products P2 and P4 (herbicide combinations and compositions used in accordance with the present invention) on cassava crop plants after harvest relative to hoe- weeded cassava crop plants (as reference).
  • the plant growth regulating effects were measured as the respective fresh root cassava yields, in each case as perecentage in comparison to the fresh root cassava yield of hoe- weeded cassava crop plants as reference (defined as 100%).
  • Table 1 Ratings of total weed control in plots treated pre-emergence with the respective product 6 weeks after treatment Product Amount of Product applied Total Weed Control in %
  • Table 2 Ratings of total weed control in plots treated pre-emergence with the respective product 8 weeks after treatment

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Abstract

L'invention concerne essentiellement l'utilisation de combinaisons herbicides spécifiques ou d'une composition contenant des combinaisons herbicides spécifiques pour lutter contre des végétaux nuisibles dans la culture de plantes à racines tubéreuses, de préférence le manioc. L'invention concerne également l'utilisation de combinaisons herbicides spécifiques ou d'une composition contenant des combinaisons herbicides spécifiques comme régulateurs de croissance pour des plantes cultivées à racines tubéreuses, de préférence le manioc. L'invention concerne encore un procédé correspondant de lutte contre les végétaux nuisibles dans la culture de plantes à racines tubéreuses, ainsi qu'un procédé correspondant de régulation de la croissance de plantes cultivées à racines tubéreuses.
PCT/EP2015/076643 2014-11-18 2015-11-16 Utilisation de certaines combinaisons d'herbicides dans la culture de plantes à racines tubéreuses WO2016079035A1 (fr)

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CN107105658A (zh) 2017-08-29

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