Methods for controlling undesirable vegetation in aquatic environments

Abstract

This invention provides a method for controlling undesirable vegetation in an aquatic environment where rice is growing. [Solution] In the present invention, a weed-killing amount of bendimethalin or a composition containing bendimethalin is applied to the aquatic environment before the emergence of undesirable vegetation and after the germination of rice seedlings. This method is particularly suitable for weed control in flooded paddy fields.

Claims

1. A method for controlling undesirable vegetation in an aquatic environment where rice is growing, comprising the step of applying a weed-killing amount of bendimethalin to the aquatic environment before the emergence of undesirable vegetation and after the germination of rice seedlings.

2. The method according to claim 1, wherein pendimethalin is applied to water or the water surface in an aquatic environment.

3. The method according to claim 1 or 2, wherein the aquatic environment is a flooded paddy field, a flooded rice paddy, a pond, or a lake.

4. The method according to any one of claims 1 to 3, wherein a composition containing a herbicidal amount of bendimethalin is applied.

5. The method according to claim 4, wherein pendimethalin is present in the composition in the form of droplets, microcapsules, or solid particles, more preferably in the form of microcapsules or solid particles, most preferably in the form of microcapsules.

6. The method according to claim 4 or 5, wherein the composition is a liquid or solid preparation, each of which may be diluted with water.

7. The method according to any one of claims 4 to 6, wherein the composition is an emulsion (EC) containing pendimethaline diluted with water, optionally a capsule suspension (CS) containing pendimethaline diluted with water, or granules (GR) containing pendimethaline; more preferably, optionally a capsule suspension (CS) containing pendimethaline diluted with water, or granules (GR) containing pendimethaline; most preferably, optionally a capsule suspension (CS) containing pendimethaline diluted with water.

8. The method according to any one of claims 4 to 7, wherein the composition is obtained by diluting the emulsion (EC) with water.

9. D of a droplet in emulsion 50 The method according to claim 8, wherein the particle size is in the range of 1 μm to 100 μm.

10. The method according to claim 8 or 9, wherein the density of droplets in the emulsion at 20°C is in the range of 1 to 1.5 g / ml.

11. The method according to any one of claims 4 to 7, wherein the composition is a capsule suspension (CS) containing pendimethalin, or a dilute aqueous suspension obtained by diluting the capsule suspension (CS) with water.

12. Capsule suspension (CS) or capsules in a dilute aqueous suspension D 50 The method according to claim 11, wherein the particle is in the range of 1 to 100 μm.

13. The method according to any one of claims 4 to 7, wherein the composition is in granule form (GR).

14. The method according to claim 13, wherein the average particle size of the granules is in the range of 0.1 to 3.5 mm.

15. The method according to any one of claims 1 to 14, wherein the rice is selected from flooded dry field direct seeding, drill seeding, moist field direct seeding, flooded direct seeding, and transplanted rice.

16. The method according to any one of claims 1 to 15, wherein pendimethalin or a composition containing pendimethalin is applied to rice seedlings at the 2-leaf to 6-leaf stage (BBCH code 12 to 16).

17. The method according to any one of claims 1 to 16, wherein pendimethaline or a composition containing pendimethaline is applied in an amount of 0.1 to 10 kg ai / ha (kilogram amount of active ingredient per hectare), more preferably 1 to 5 kg ai / ha, even more preferably 1 to 4 kg ai / ha, even more preferably 1 to 3 kg ai / ha, and particularly 1 to 2.5 kg ai / ha.

18. The method according to any one of claims 1 to 17, wherein pendimethalin or a composition containing pendimethalin is applied 5 to 15 days, more preferably 5 to 10 days, and even more preferably 7 to 10 days, after sowing rice seeds or transplanting rice.

19. The method according to any one of claims 1 to 18, wherein the undesirable vegetation includes herbicide-resistant or herbicide-tolerant weed species.

20. The method according to claim 19, wherein the herbicide-resistant or herbicide-tolerant weed species is a biotype that is resistant or tolerant to at least one herbicide selected from the group consisting of acetyl-CoA carboxylase (ACCase) inhibitors (HRAC classification A), acetolactate synthase (ALS) inhibitors (HRAC classification B), photosystem II (PS II) inhibitors (HRAC classification C1, C2, and C3), DOXP synthase inhibitors (HRAC classification F4), and very long-chain fatty acid (VLCFA) inhibitors (HRAC classification K3).

21. Undesirable vegetation includes the genera Aegilops, Avena, Brachiaria, Bromus, Cenchrus, Chloris, Cyperus, Dactyloctenium, Digitaria, Echinochloa, Eleusine, Eriochloa, and Leptochloa. , vegetation (Lolium), sorghum (Panicum), rhododendron (Phalaris), sedge (Poa), horned reed (Rottboellia), foxtail grass (Setaria), sorghum (Sorghum), sorghum (Urochloa), Abutilon, amaranth (Amaranthus), dwarf loosestrife (Ammannia), dwarf laurel (Amsinckia), anchusa, bacopa, and wild rose (Rorippa genus) (Barbarea), Bassia, Brassica, Calandrinia, Capsella, Chamaesyce, Chenopodium, Cuscuta, Erodium, Heteranthera, Ipomoea, Lactuca, Lamium, Mollugo, Selected from the genera Persicaria, Polygonum, Pontederia, Portulaca, Richardia, Schoenoplectiella, Senecio, Sida, Sinapis, Sisymbrium, Solanum, Stellaria, and Tribulus.More preferably, the method according to any one of claims 1 to 20, selected from the genera Echinochloa and Leptochloa.

22. Undesirable vegetation includes Aegilops cylindrical (AEGCY), Avena fatua (AVEFA), Brachiaria platyphylla (BRAPP), Brachiaria texana (PANTA), Bromus commutato (BROCO), Bromus japonicus (BROJA), Bromus secalinus (BROSE), Bromus tectorum (BROTE), Cenchrus spinifex (CCHPA), Chloris barbata (CHRBA), Cyperus difformis (CYPDI), Cyperus eragrostis (CYPER), and Dactyloctenium. aegyptium (DTTAE), Digitaria sanguinalis (DIGSA), Echinochloa colonum (ECHCO), Echinochloa crus-galli (ECHCG), Echinochloa muricata (ECHPU), Echinochloa muricata var. microstachya (ECHCM), Echinochloa oryzicola (ECHCR), Echinochloa oryzoides (ECHOR), Echinochloa walteri (ECHWA), Eleusine indica (ELEIN), Eriochloa villosa (ERBVI), Leptochloa fusca subsp. uninervia (LEFUN, Mexican sprangler top), Leptochloa fusca subsp.fascicularis (LEFFA), Lolium multiflorum (LOLMU), Lolium rigidum (LOLRI), Panicum capillare (PANCA), Panicum dichotomiflorum (PANDI), Panicum miliaceum (PANMI), Phalaris canariensis (PHACA), Poa annua (POAAN), Rottboellia cochinchinensis (ROOEX), Setaria faberi (SETFA), Setaria pumila (SETPU), Setaria viridis (SETVI), Sorghum halepense (SORHA), Sorghum x drummondii (SORSU, Sudan grass), Urochloa fusca (PANFA, brown-top panicum), Urochloa maxima (PANMA, Guinea grass), Abutilon theophrasti (ABUTH, Japanese hibiscus), Amaranthus palmeri (AMAPA, large-horned blue amaranth), Amaranthus retroflexus (AMARE, blue amaranth), Amaranthus tuberculatus (AMATU, false amaranth), Ammannia auriculata (AMMAU, American loosestrife), Ammannia coccinea (AMMCO, narrow-leaved dwarf loosestrife), Amsinckia menziesii (ANSME, fiddleneck), Anchusa arvensis (LYCAR, rough cow's foot grass), Bacopa monnieri (BAOMO, maiden's dwarf dwarf dwarf), Barbarea vulgaris (BARVU), Bassia scoparia (KCHSC), Brassica nigra (BRSNI), Calandrinia ciliata subsp.menziesii (CLNCM, Red Myze Rock Purse Lane), Capsella bursa-pastoris (CAPBP, Shepherd's Purse), Chamaesyce maculata (EPHMA, Euphorbia maculata), Chenopodium album (CHEAL, Laurel's Lacquer), Chenopodium leptophyllum (CHELE, Dwarf Gooseberry), Cuscuta europaea (CVCAU, Dodendron molle), Erodium cicutarium (EROCI, Geranium cicutarium), Heteranthera limosa (HETLI, American Gooseberry), Ipomoea hederacea (IPOHE, American Morning Glory), Lactuca serriola (LACSE, Thorny Lettuce), Lamium amplexicaule (LAMAM, Lamium amplexicaule), Mollugo verticillata (MOLVE, Carpet Pomegranate), Persicaria maculosa (POLPE), Persicaria pensylvanica (POLPY), Polygonum aviculare (POLAV), Pontederia vaginalis (MOOVA), Portulaca oleracea (POROL), Richardia scabra (RCHSC), Schoenoplectiella mucronata (SCPMU), Senecio vulgaris (SENVU), Sida spinosa (SIDSP), Sinapis arvensis (SINAR), Sisymbrium irio (SSYIR), Solanum nigrum (SOLNI), Stellaria media (STEME), and Tribulus The method according to any one of claims 1 to 21, selected from terrestris (TRBTE, Tribulus terrestris).

23. The undesirable vegetation is selected from Cyperus difformis (CYPDI), Echinochloa crus-galli (ECHCG), Echinochloa oryzicola (ECHCR), Leptochloa fusca subsp. fascicularis (LEFFA), Ammannia auriculata (AMMAU), Bacopa monnieri (BAOMO), Heteranthera limosa (HETLI), Pontederia vaginalis (MOOVA), and Schoenoplectiella mucronata (SCPMU), more preferably Echinochloa crus-galli (ECHCG), Echinochloa The method according to any one of claims 1 to 22, selected from oryzicola (ECHCR, late-maturing barnyard grass) and Leptochloa fusca subsp. fascicularis (LEFFA, leucopia fusca).

24. Pendimethaline, or a composition containing pendimethaline, b1) to b15) b1) Lipid biosynthesis inhibitors; b2) Acetolactate synthase inhibitors (ALS inhibitors); b3) Photosynthesis inhibitors; b4) Protoporphyrinogen-IX oxidase inhibitors, b5) Whitening herbicides; b6) Enolpyruvirshikimate 3-phosphate synthase inhibitors (EPSP inhibitors); b7) Glutamine synthetase inhibitors; b8) 7,8-dihydropteroinate synthase inhibitors (DHP inhibitors); b9) Mitotic inhibitors; b10) Inhibitors of the synthesis of very long-chain fatty acids (VLCFA inhibitors); b11) Cellulose biosynthesis inhibitors; b12) Decoupler herbicides; b13) Auxin herbicide; b14) Auxin transport inhibitors; and b15) Bromobutide, Chlorflurenol, Chlorflurenol-methyl, Symmethiline, Cumilon, Darapon, Dazomet, Diphenzocort, Diphenzocort-methylsulfate, Dimethipine, DSMA, Daimuron, Endotar, and their salts, Etobenzanide, Flamprop, Flamprop-isopropyl, Flamprop-methyl, Flamprop-M-isopropyl, Flamprop-M-methyl, Flurenol, Flurenol-butyl, Flurup Other herbicides selected from the group consisting of Limidol, Hosamin, Hosamin-ammonium, Indanophan, Indadiflame, Hydrazide maleate, Mefluidide, Metam, Methiozoline, Methyl azide, Methyl bromide, Methyl dimuron, Methyl iodide, MSMA, Oleic acid, Oxadiclomefone, Pelargonic acid, Pyributicarb, Quinoclamine, Tetoflupyrrolimet, Triaziflame, Tridiphan, and 6-Chloro-3-(2-cyclopropyl-6-methylphenoxy)-4-pyridazinol (CAS 499223-49-3), and its salts and esters; as well as their agriculturally acceptable salts or derivatives The method according to any one of claims 1 to 23, applied in combination with at least one further herbicide B selected from the group.

25. Pendimethaline or a composition containing pendimethaline may be mixed with benoxacol, croquintoset, siomethrinyl, cyprosulfamide, dichlormid, dicyclonone, diethrate, fenchlorazole, fenchlorim, flurazole, fluxofenim, flirazole, isoxadifen, mefenpyr, mefenate, naphthaleneacetic acid (NAA), naphthalic anhydride (NA), oxavethrinyl, 4-(dichloroacetyl)-1-oxa-4-azaspiro[4,5]decane (MON4660, CAS 71526-07-3), 2,2,5-trimethyl-3-(dichloroacetyl)-1,3-oxazolidine (R-29148, CAS 52836-31-4), metcamifen, 4-bromophenylchloromethylsulfone (BPCMS, CAS The method according to any one of claims 1 to 24, wherein the product is applied in combination with at least one phytotoxicity reducing agent C selected from 54091-06-4 and its agriculturally acceptable salts or derivatives.

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