CN114145307A

CN114145307A - Weeding composition for preventing and treating weeds in rice field

Info

Publication number: CN114145307A
Application number: CN202111560793.9A
Authority: CN
Inventors: 罗昌炎; 詹姆斯·T·布里斯托
Original assignee: Jiangsu Rotam Chemical Co Ltd
Current assignee: Jiangsu Rotam Chemical Co Ltd
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2022-03-08
Also published as: CN108235989A

Abstract

The invention relates to a weeding composition for preventing and treating weeds in paddy fields, which comprises active components of a compound (A) and a compound (B), wherein the compound (A) is metazosulfuron or salt thereof; the compound (B) is 2-methyl-4-chloro-sodium or 2-methyl-4-chloro-isooctyl; the weight ratio of the compound (A) to the compound (B) is 1:10-1: 50. The weeding composition for preventing and treating the weeds in the paddy fields shows a remarkable synergistic effect in preventing and treating undesirable plants such as barnyard grass, crab grass, quinoa, chickweed and the like in the paddy fields.

Description

Weeding composition for preventing and treating weeds in rice field

The application is a divisional application with the application number of 2016112234733, the application date of 2016, 12 and 27, and the title of the invention is "a herbicidal composition and application thereof".

Technical Field

The invention relates to the field of agriculture, in particular to a weeding composition for preventing and treating weeds in a paddy field; also relates to the use of the herbicidal composition for controlling undesired plant germination or growth in rice fields.

Background

The crop production in the world is greatly lost due to diseases, insects and weeds every year, the crops are almost damaged by various weeds in the whole growing season, and the weed damage is also a key factor for restricting the crop yield. Thus, the control of agricultural weeds has been a major concern and important issue in agricultural production.

CN104145958A discloses a bromoxynil and 2-methyl-4-chloro microemulsion, which has good dispersibility in water and high activity, and can effectively prevent and remove broadleaf weeds in the bud stage, such as broadleaf weeds including polygonum, quinoa, amaranth, hordei, black nightshade, xanthium sibiricum, maica, salsola, Convolvulus arvensis, buckwheat vines and the like.

The use of chemical herbicides is one of the important marks of modern agriculture, and in recent years, the sale amount of herbicides has increased year by year and the application area has also expanded year by year. However, with the continuous use of large areas of numerous herbicide species, numerous problems arise, such as the onset of emergence of weed resistance problems, particularly of resistance problems in older weeds; in addition, the single herbicide has single action mode, short lasting period and the like. Thus, there is an urgent need for long-acting herbicides and combinations thereof that have a broad herbicidal spectrum, are highly selective, and are less stressful for weed resistance.

Disclosure of Invention

The object of the present invention is to provide a herbicidal composition for controlling weeds in paddy fields, which in a particularly advantageous manner achieves the "synergistic" action on weed control required by the skilled worker, even including certain weed species which are difficult to control. Moreover, application of the compositions according to the invention makes it possible to significantly reduce the application rates of the individual components of the combination and to reduce the phytotoxicity to the crop plants.

By "synergistic" action is meant that in some instances the herbicidal active ingredients have been shown to be more effective when applied in combination than when applied individually. "synergistic" action means that two or more factors interact such that the effect when combined is greater than would be expected based on the response of each factor when applied separately.

The invention provides a weeding composition for preventing and treating weeds in paddy fields, which comprises active components of a compound (A) and a compound (B); wherein the compound (A) is metazosulfuron or its salt; the compound (B) is 2-methyl-4-chloro and derivatives thereof.

The weight ratio of the compound (A) to the compound (B) is 1:1 to 1:200, preferably 1:5 to 1:150, more preferably 1:10 to 1:100, more preferably 1:10 to 1:80, more preferably 1:10 to 1:60, more preferably 1:10 to 1: 50.

The weight ranges of the compound (A) and the compound (B) can also be 1:1-1:200,1:1-1:190,1:1-1:180,1:1-1:170,1:1-1:60,1:1-1:150,1:1-1:140,1:1-1:130,1:1-1:120,1:1-1:110, more preferably 1:1-1:100, more preferably 1:5-1:100,1:5-1:80,1:5-1:70,1:5-1:50, more preferably 1:10-1: 50.

The weight ranges of the compound (A) and the compound (B) may also be 1:1,1:2,1:3,1:4,1:5,1:6,1:7,1:8,1:9,1:10,1:11,1:12,1:13,1:14,1:15,1:16,1:17,1:18,1:19,1:20,1:21,1:22,1:23,1:24,1:25,1:26,1:27,1:28,1:29,1:30,1:31,1:32,1:33,1:34,1:35,1:36,1:37,1:38,1:39,1:40,1:41,1:42,1:43,1:44,1:45,1:46,1:47,1:48,1:49,1:50,1:55,1: 65,1:70,1: 85,1: 95: 80,1:85,1: 6, 1:100,1:110,1:120,1:130,1:140,1:150,1:160,1:170,1:180,1:190,1:200.

The invention also provides a weeding composition for preventing and controlling weeds in paddy fields, which comprises the active components of a compound (A) and a compound (B), wherein the content of the compound (A) and the compound (B) accounts for 1-90%, preferably 5-80%, more preferably 10-80%, more preferably 15-80%, more preferably 20-80%, more preferably 30-80%, more preferably 40-80% of the weeding composition, and the compound (A) is metazosulfuron-methyl or salt thereof; the compound (B) is 2-methyl-4-chloro-sodium or 2-methyl-4-chloro-isooctyl.

The invention also provides a weeding composition for preventing and controlling the weeds in the paddy field, wherein the active components comprise the compound (A) and the compound (B), and the content of the compound (A) and the compound (B) in the weeding composition can be 1%, 3%, 5%,7%,8%,9%,10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%.

The invention also provides a weeding composition for preventing and controlling the weeds in the paddy field, which comprises the active components of the compound (A) and the compound (B), and also comprises a filling agent and/or a surfactant.

The dosage form of the weeding composition is wettable powder, water-soluble granules, water-soluble liquid, missible oil, suspending agents, microcapsules, microemulsions, aqueous emulsions, suspoemulsions, microcapsule suspension-suspending agents, water dispersible granules, ultra-low volume liquid, tablets, low volume dispersible granules, pills or dry suspending agents.

The herbicidal composition for controlling paddy field weeds of the present invention further contains a herbicide safener if necessary.

The herbicide safener is selected from 1, 8-naphthalic anhydride (1, 8-naphtalene dicarboxycarbyl anhydride), Benoxacor (Benoxacor), Cloquintocet-mexyl (Cloquintocet-mexyl), Fenchlorazole (Fenchlorazole-ethyl), furazol (Furilazole), Benoxacor (2-dicholomethyl-2-methyl-1, 3-dioxolone), chloracetonil (cyclotrinil), oxanilide (Oxalinil), fluxofenam (Fluxofenam), Fenclorim (Fenclorim), fluquinalone (Flurazole) or cumylene (Acetamide), Isoxadifen (Ruxadifen), pyraclonil (fenpyr-diethyl), cloquinate (Cloquinol-mexyl), dichlorpropenyl (Isopropyzamide), dichlorphenamide (Chlorpyriproxyfen), benazolate (bensul-mefenozide), Benoxacor (Mefenozide), pyriproxyfen (benazol-ethyl), pyriproxyfen (benazolidone (benazolone), pyriproxyfen (benazolidone), pyriproxyfen (benazolidone), pyriproxyfen (benazolidone (benazol-ethyl), pyriproxyfen (benazol), pyriproxyfen (benazolidone), pyriproxyfen (benazolidone (benazol), pyriproxyfen (benazol), pyrimethanil), pyriproxyfen (benazolidone), pyributrin), pyriproxyfen (benazol), pyriproxyfen (benazolidone (benazol), pyriproxyfen (benazol), pyributrin), pyriproxyfen (benazol), pyriproxyfen (benazolidone (benazol), pyributrin), pyrimethanil), pyributrin (benazolidone (benazol-ethyl), pyributrin (benazolidone (benazol), pyributrin (benazol-ethyl ester (benazol), pyributrin), pyrimethanil (benazol (benbenbenbenbenbenbenbenbenbenbenbenazol-pyrimethanil), pyrimethanil (benbenazol (benazol (benbenbenbenazol (benazol (ben (benbenbenbenazol (ben (benazol (benbenbenbenbenbenbenbenbenbenbenbenben (ben-ethyl ester (benbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenazol (benbenbenbenazol (benbenbenbenbenazol, pyrimethanil), at least one of Isoxadifen-ethyl and N-phenyl-sulfonyl benzoic acid amide.

The herbicidal composition for controlling paddy field weeds according to the present invention may further comprise various active compounds of other components, for example, a herbicide selected from the group consisting of fungicides, insecticides, acaricides, nematicides, bird repellents, soil conditioners, plant nutrients (fertilizers), and herbicides having a structure different from that of the compound (a) and the compound (B), and plant growth regulators.

The herbicidal composition for controlling paddy field weeds of the present invention may further comprise a liquid fertilizer or a solid fertilizer.

The use of a herbicidal composition for controlling weeds in paddy fields for controlling undesired germination or growth of plants.

The application of the weeding composition for preventing and controlling the weeds in the paddy field in preventing and controlling the germination or growth of undesirable plants in gramineae weeds, cyperaceae weeds and broadleaf weeds.

The herbicidal composition for controlling paddy field weeds of the present invention exhibits synergistic effects in the control of barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.), green bristlegrass (Setaria viridis (L.) Beauv.), Digitaria sanguinalis (L.) Scop.), wild oat (Avena fatua L.), Chenopodium album (L.) Chenopodium album L.), chickweed (Stellaria media (L.) Cyr.), fluorite (Schoenopectus juncoides Roxb.), Cyperus heterophyllus (Cyperus difformis L.) at a rate lower than the application rate of each compound alone.

The herbicidal composition for controlling weeds in paddy fields can be used for controlling undesirable vegetation at the following sites: direct sowing, water sowing and transplanted rice.

The use of the herbicidal compositions of the present invention for controlling undesired plant germination or growth in rice crops, which are tolerant to rice crops.

A method of controlling undesirable vegetation comprising: (i) the herbicidal composition for controlling paddy weeds of the present invention is applied to undesired plants or their growing sites before the undesired plants germinate (pre-emergence), (ii) after the undesired plants germinate (post-emergence), or (iii) at (i) and (ii).

A method for controlling undesired plants, which comprises contacting the undesired plants or a place where they grow with a herbicidally effective amount of said herbicidal composition for controlling paddy weeds. A herbicidally effective amount refers to the amount of the herbicidally active ingredient that is applied to control undesirable vegetation.

A method for controlling undesired plants, wherein the herbicidal composition for controlling weeds in paddy fields according to the present invention is applied to undesired plants or a field where they grow so as to control germination or growth of the undesired plants.

A method for controlling undesired plants, comprising applying the herbicidal composition for controlling weeds in paddy fields of the present invention to soil or water to control the germination or growth of undesired plants.

A method for controlling undesired plants, wherein the compound (A) and the compound (B) in the herbicidal composition for controlling weeds in paddy fields according to the present invention are applied to undesired plants or their growing field together or individually so as to control the germination or growth of the undesired plants.

A method for controlling undesired plants, wherein the compound (A) and the compound (B) in the herbicidal composition for controlling weeds in paddy fields of the present invention are applied to soil or water together or separately to control the germination or growth of undesired plants.

A method for controlling undesired vegetation, which comprises applying the herbicidal composition for controlling paddy weeds of the present invention in the presence of a plant of a useful crop, a seed of a useful crop or other reproductive part of a useful crop.

A method for controlling undesired plants, which comprises adding the herbicidal composition for controlling weeds in paddy fields of the present invention to irrigation water and applying it to undesired plants or their growing sites by using a ground or aerial duster, sprayer, or granule.

Detailed description of the invention:

the invention aims to provide a weeding composition for preventing and controlling weeds in paddy fields, which comprises active components of a compound (A) and a compound (B); wherein the compound (A) is metazosulfuron or its salt; the compound (B) is 2-methyl-4-chloro and derivatives thereof.

Metazosulfuron (CAS number 868680-84-6) is a sulfonylurea herbicide developed by Nissan chemical Co., Ltd, and is a novel herbicide obtained by further optimizing the structure of the herbicide halosulfuron-methyl. Metazosulfuron has been described in WO 2005103044. The metazosulfuron is a good selective herbicide which has excellent weeding effect on weeds and does not show phytotoxicity on rice and wheat.

The 2-methyl-4-chloro and the derivatives thereof are phenoxyacetic acid selective systemic conduction hormone herbicides which are easy to be absorbed and conducted by roots and leaves, and destroy the conduction tissues of dicotyledons, so that the growth and development of the dicotyledons are interfered, stems and leaves are twisted, the stem bases are expanded and thickened or cracked, and the dicotyledons die due to swelling, cracking, mildew and rot. The 2-methyl-4-chloro compound and the derivative thereof are widely used for preventing and killing broadleaf weeds on crops such as rice, corn, wheat and the like, and have good safety to the crops. 2 methyl 4 chloro, english name MCPA, chemical name: 2-methyl-4-chlorophenoxyacetic acid, the molecular structural formula of which is represented by the following formula:

2 methyl 4 chloro or a derivative thereof may refer to 2 methyl 4 chlorophenoxyacetic acid itself and agriculturally acceptable esters and salts. Suitable salts include those derived from alkali or alkaline earth metals and those derived from ammonia and amines. Preferred cations include sodium, potassium, magnesium. Preferred amine salts are those derived from: ammonia, methylamine, dimethylamine, trimethylamine, isopropylamine, monoethanolamine, diethanolamine, triethanolamine, diglycolamine, triisopropanolamine, choline, 2-methylthiopropylamine, diallylamine, 2-butoxyethylamine, morpholine, cyclododecylamine or benzylamine. Amine salts are often preferred because they are water soluble and are themselves suitable for preparing the desired aqueous herbicidal compositions. Suitable esters include those derived from C1-C12 alkyl alcohols, C3-C12 alkenyl alcohols, or C3-C12 alkynyl alcohols (e.g., methanol, isopropanol, butanol, 2-ethylhexanol, butoxyethanol, methoxypropanol, allyl alcohol, propynyl alcohol, or cyclohexanol), as well as thioethyl esters, ethyl thioesters, and the like. The second active ingredient is preferably 2 methyl 4 chloroisopropyl acid, 2 methyl 4 chlorobutyric acid, 2 methyl 4 chlorobutyl butyrate, 2 methyl 4 chloroisooctyl ester, 2 methyl 4 chloroethyl thioester, 2 methyl 4 chlorothioethyl ester, 2 methyl 4 chloro sodium salt, 2 methyl 4 chloro potassium salt, 2 methyl 4 chloro isopropyl amine salt.

The compound B is preferably selected from 2 methyl 4 chloroisopropyl acid, 2 methyl 4 chlorobutyric acid, 2 methyl 4 chlorobutyl butyrate, 2 methyl 4 chloroisooctyl ester, 2 methyl 4 chloroethyl thioester, 2 methyl 4 chlorothioethyl ester, 2 methyl 4 chloro sodium salt, 2 methyl 4 chloro potassium salt and 2 methyl 4 chloro isopropyl amine salt.

The invention also provides a herbicidal composition for controlling weeds in paddy fields, the active ingredients of which consist of a compound (a) and a compound (B), the content of the compound (a) and the compound (B) being 1% to 90%, preferably 5% to 80%, more preferably 10% to 80%, more preferably 15% to 80%, more preferably 20% to 80%, more preferably 30% to 80%, more preferably 40% to 80% of the herbicidal composition, the compound (a) being a compound described by formula (I) or an agriculturally acceptable salt or ester thereof; the compound (B) is selected from 2-methyl-4-chloro and derivatives thereof.

The synergistic effect can result in a reduced application rate of the individual herbicides, a higher efficacy at the same application rate, control of previously untreated varieties, control of varieties tolerant or resistant to a single herbicide or to multiple herbicides, an extended application period and/or a reduction in the number of individual applications required; and for the user, a more economically and ecologically advantageous weed control system is obtained.

The herbicidal composition for controlling paddy field weeds of the present invention allows the activities of the compounds (a) and (B) to be synergistically enhanced in an unexpected manner beyond the activities achievable using the individual active ingredients of the compound (a) and the compound (B).

The herbicidal composition for controlling paddy field weeds of the present invention may further contain one or more other active compounds which are different from the compound (a) and the compound (B) and also act as selective herbicides.

Preferably, the one or more other active compounds which are different from compound (a) and compound (B) and which are also useful as selective herbicides include acetochlor (acetochlor), activated ester (acibenzolar), benzothiadiazole (acibenzolar-S-methyl), acifluorfen (acifluorfen), aclonifen (aclonifen), alachlor (alachlor), butachlor (allechlor), diclofenacet (alloxidin), ametryn (ametryn), amicarbazone (amicarbazone), amidosulfuron), aminopyralid (amicarbazone), imazapyr (amicarbazone), amicarbazone (amicarbazone), ammonium sulfamate (ammonium sulfamate), pyriminol (aminocyclophos), pyrifos (amicarbazone), pyrazosulfuron (amicarbazone), pyribenzosulfuron), bensulfuron (fensulfuron), pyrazosulfuron (fensulfuron), fensulfuron (fentrazone), fentrazone (fentrazone), bensulfuron (fentrazone), bensulfuron (fentrazone), bensulfuron) and bensulfuron (fentrazone) for example, bensulfuron) can, bensulfuron, benfurbenfurbensulfuron, bensulfuron, benfurbensulfuron, bensulfuron, benfurbenfurbensulfuron, bensulfuron, benfurbenfurbenfurbenfurbensulfuron, bensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, benfurbenfurbenfurbenfurbensulfuron, bensulfuron, benfurbenfurbensulfuron, bensulfuron, benfurbensulfuron, bensulfuron, benfurbenfurbensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, bensulfuron, benfurbenfurbensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, benfurbenfurbenfurbenfurbenfurbensulfuron, benfurbensulfuron, benfurbenfurbenfurbensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, benfurbensulfuron, bensulfuron, benfurbensulfuron, benfurbenfurbenfurbenfurbenfurbenfurbenfurbenfurbensulfuron, bensulfuron, benfurben, Fomesafen (benzofluor), fluroxypyr (bicyclopyrone), bispyribac-sodium (bispyribac-sodium), butachlor (butachlor), butafenacil (butafenacil), butralin (butralin), cafenstrole (cafenstrole), diacyl-amine (carpetamide), carfentrazone (carfentrazone), chlorimuron (chlorimuron, chlorimuron-ethyl), chlormequat (chlorimuron), chlortoluron (chlorimuron), chlorsulfuron (chlorimuron), cinmethylin (cinmethylin), cinolone (cyclomethionate), clomazone (clomazone), clomazone (clorsulon), clomazone (clobetamethazone), pyributicacid (dicron), dicrotofen-ethyl (diclofen-ethyl), pyrithion (dicron), pyrithiobac (dicron (diclomeron), pyrimethanil (diclomeron (dicron), pyrimethanil (pyrimethanil), pyrimethanil (cyclomethiconuron (pyrim), pyrimethanil (pyrimethanil), pyrimethanil (pyrimethanil-methyl-propiram), pyrimethanil (pyrimethanil), pyrimethanil (pyrimethanil), pyrimethanil (pyrimethanil), pyrimethanil-pyrimethanil (pyrimethanil), pyrimethanil (pyrimethanil-benbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenbenben, diflufenil, diflufenzopyr, dimefluuron, dimeflufen (dimepiperate), dimethachlron, isovaleryl (dimethyn), diphenoxamine (diphenpyrad), ipratron (dippetron), diquat (diquat), diuron (diuron), ethametsulfuron (ethametsulfuron), ethametsulfuron-methyl, ethephon (ethephon), thifensulfuron (ethiuron), sulfosulfuron (ethidium), ethoxysulfuron (ethofenpuron), ethoxysulfuron (ethysuron), ethoxybenemin (ethofenprox), fenoxaprop-P-ethyl, flufenpyrazofen-ethyl), flufenpyrazofen (flufenpyraflufen-ethyl), flufenpyrazofen-ethyl (flufenpyraflufen), pyraflufen-ethyl (flufenpyraflufen-ethyl), flufenpyrazofen-ethyl (flufenpyraflufen-ethyl), pyraflufen-ethyl (flufenpyrazofen-ethyl), pyraflufen-ethyl (flufen-ethyl), pyrazofen-ethyl (flufen-ethyl (P-ethyl), flufen-ethyl (flufen-ethyl), pyrazofen (flufen-ethyl), pyrazofen-ethyl (fenoxafen-ethyl (fenoxaprop-ethyl), pyraflufen-ethyl (fenoxaprop-ethyl), pyraflufen-ethyl (flufen-ethyl), pyraflufen-ethyl (flufen-ethyl), pyraflufen-ethyl, flufen-ethyl), pyraflufen-ethyl (flufen-ethyl ), pyraflufen-ethyl (flufen-ethyl, flufen-ethyl (flufen-ethyl, flucarbazone (flucarbazone-sodium), flucarbazone (fluetosulfuron), flufenacet (flufenacet), flumetralin (fluetrralin), flumetsulam (fluethilin), flumetsulam (fluethisulam), flumetsulam (fludioxonil), fluoroglycofen (fluxofen), fludroxyfen-ethyl, fludroxyfen (fluxofenam), flumetsulam (fluxofenaron), flumetsulam (fluidofen), fluoroglycofen (fluxofenan), fluxofenacet (fluxofenam), flumetsulam (fluxofenacet), fludioxonil (fluxofenacetone), fluxofenidone (fluxofenacet), glyphosate (fluxofenacet), fluorofenacet (fluxofenacet), flumethione (flufenacet-sodium), sulfadiazine (ammonium-phosphate-sodium (phosphate-ammonium salt), sulfofenamate (ammonium-sodium-sulfate (ammonium-phosphate, ammonium-phosphate (ammonium-phosphate, ammonium-phosphate, ammonium-phosphate (ammonium-phosphate, ammonium-phosphate, halosulfuron-methyl, fluazifop (haloxyfop), fluazifop (haloxyfop-P), fluazifop (haloxyfop-ethyl), fluazifop (haloxyfop-P-ethyl), hexazinone (hexazinone), imazamethabenz (imazamethabenz-z), imazamethabenz (imazamox, imazamox-ammonium), imazamox (imazamox), imazapyr (isoxapyroxyfon), isoxapyroxapyroxaprid (isoxapyroxaprid), isoxapyroxaprid (isoxaprid, isoxapyroxaprid), imazapyr (isoxapride (isoxapyroxaprid), imazapyr (isoxapride), imazapyr (isoxapyroxapride (isoxapyroxapyroxapyroxaprid), imazapine (isoxapyroxapril, isoxapril (isoxapyroxapyroxapril), imazapine (isoxapyroxapril, isoxapyroxapyroxapril, isoxapril, isoxapyroxapyroxapyroxapyroxapril (isoxapril), imazapine (isoxapril, isoxapyroxapyroxapyroxapril, isoxapyroxapril (isoxapril, isoxapyroxapril, isoxapyroxapyroxapril), imazapine (isoxapyroxapril, isoxapril, isoxapyroxapril (isoxapril, isoxapyroxapyroxapril, isoxapril, isoxapyroxapril, isoxapril (isoxapril, isoxapyroxapyroxapyroxapril, isoxapril, isoxaflufen (isoxapyroxim), lactofen (lactofen), lenacil (lenacil), mefenacet (mefenacet), mefenacet (mefluidide), mepiquat-chloride (mepiquat-chloride), mesosulfuron (mesosulfuron), mesotrione (mesotrione), metosultone (mesotrione), mefenacet (methabenzthiazone), metosulam (metamifop), metamitron (metamitron), pyrazosulfuron (metazachlor), metosulazole (methazolone), methidathion (methasulforon), benzoxyzone (methoxone), methimauron (methythioron), metosulron (metosulron), metosulam (metosulam), metosulam (metosulam), metosulam (metosulam), metosulam (metosulam), metosulam (metosulam), metosulam (metosulam, metosul, Oxadiazon (oxadiazinon), oxasulfuron (oxasulfuron), oxaziclofos (oxaziclofos), oxyfluorfen (oxyfluorfen), paclobutrazol (paclobutrazol), paraquat (paraquat, paraquat dichloride), pendimethalin (pendimethalin), pentoxazone (pentoxazone), pethoxamid (pethoxamid), picloram (picloram), pyraflufen (picolinate), pyraflufen (picolinafen), pinoxaden (pinoxaden), piperaphos (piperophos), pretilachlor (pretilacor), probenazole (probenazole), flumetsulam (proflavone), profluralin (propyzamide), pyrithiobac (propyzamide (pyrithiobac (pyrazosulfuron), pyrithiobac (propyzamide), pyribencarb (propyzamide), pyrifos (bencarb (propyzamide), pyribencarb (bencarb), pyribensulfuron (bencarb), pyrimethanil), pyribensulfuron (bensulfuron), pyribensulfuron (bensulfuron (bencarb), pyribencarb), pyribensulfuron (bensulfuron (bencarb), pyribensulfuron (bencarb-methyl), pyribensulfuron (bensulfuron (bencarb), pyribensulfuron (bensulfuron), pyribensulfuron (bensulfuron), pyribensulfuron (bensulfuron (bencarb), pyribencarb), pyribensulfuron (bensulfuron (bencarb), pyribencarb), pyrifturon (bensulfuron (bencarb), pyrifturon (bencarb), pyribensulfuron (bencarb), pyrifturon (bensulfuron (bencarb), pyribencarb), pyrifturon (bensulfuron (bencarb), pyrifturon (bencarb), pyribencarb), pyrifturon (bencarb), pyrifturon (bencarb), pyribencarb (bencarb), pyrifturon (bencarb), pyrifturon (bencarb (bensulfuron (bencarb), pyrifturon (bencarb), pyribencarb (bencarb), pyrifturon (bencarb, Isopropyl pyribenzoxim (pyribenzoxim), pyributicarb (pyributicarb), pyribenzoxim (pyriftalid), pyriminobac (pyriminobac-methyl), pyrithiobac (pyrithiobac-sodium), pyroxasulfone, pyroxsulam (pyroxsulam), quinclorac (quinclorac), quinclorac (quinmerac), quizalofop (quizalofop), setron (fensulfuron methyl), sulfofensulfuron (fensulfuron-methyl), sulfofensulfuron (sulfosulfuron-methyl), sulfofensulfuron (sulfosulfuron-methyl), sulfosulfuron-methyl (sulfosulfuron-methyl), sulfofensulfuron (thion (thiobac (fensulfuron), sulfosulfuron-methyl), sulfofensulfuron (thiosulfuron, sulfosulfuron-methyl), sulfofensulfuron-methyl), sulfosulfuron-methyl, sulfofensulfuron-methyl, sulfofenthiosulfuron-methyl, thiosulfuron-methyl, thiobensulfuron-methyl, thiofenthiosulfuron-methyl, thiofenthion-methyl, thiofenthiobensulfuron-methyl, thiofenthion-methyl, thion (thiofenthion-methyl, thion-methyl, thiobensulfuron-methyl, thiofenthiobensulfuron-methyl, thiofenthion-methyl, thiofenthiofenthiofenthiofenthion, thion, thiofenthion-methyl, thiofenthion, thiofenthiofenthion, thiofenthiofenthiofenthiofenthion, thion, thiobensulfuron-methyl, thion, thiofenthiofenthion, thiobensulfuron-methyl, thiobenethyl, thiobensulfuron-methyl, thiobenethyl, thiobensulfuron-, Trazachlor (triaziflam), tribenuron-methyl (tribenuon-methyl), trichloroacetic acid (TCA), triclopyr (triclopyr), cyhalothrin (tridephane), trifloxysulfuron (trifloxysulfuron-sodium), trifluralin (trifluralin), triflusulfuron (triflusulfuron), triflusulfuron methyl ester (triflusulfuron-methyl), tritron (trimeturon), trinexapac-ethyl (trinexapac, trinexapac-ethyl), triflusulfuron (tritosulfuron), tsutodef, uniconazole (uniconazole), penoxsulam (enxosulam), cyhalofop, methyldisulfuron (mesosulfuron).

Although the compounds (a) and (B) already exhibit good or even sufficient selectivity in a large number of crops, in principle phytotoxicity to the crop plants may occur in some crops, in particular also in combination with other less selective herbicides. Therefore, a composition comprising the herbicidal composition for controlling paddy field weeds according to the present invention and one or more safeners is particularly advantageous. The safeners are applied in a detoxifically effective amount, for example to economically important crops or to reduce the phytotoxic side effects of the herbicides used in fruit plantations (plantation crops).

The following are, for example, compounds suitable as safeners (including possible stereoisomers and agriculturally commonly used esters or salts): the herbicide safener is selected from 1, 8-naphthalic anhydride (1, 8-naphtalenedicarbonylhydrazide), Benoxacor (Benoxacor), fenclozole (fenclozole-ethyl), Furilazole (Furilazole), jiecan (2-dichloromethyl-2-methyl-1, 3-dioxolone), Cloquintocet (Cloquintocet-mexyl), Cloquintocet (cyclometrine), Cloquintocet (cyclotrinil), Oxabetrinil (Oxalim), fluxofenam (Fluxofenarm), fenpyr (Fenclorim), fluquine (Flurazole) or cumene (Acetamide), Isoxadifen (Ruxadifen), Mefenpyr (fenpyr-diethyl), clofenflurazote (Cloquinol-mexyl), dichlorpropenamine (dichlornphor), dichlorphenazine (dichlorphenazine), benazolate (benoxadinioxin (Mefenpyr), fenpyr-diethyl), fenpyr (dichlorfenate), dichlorfenate (dichlorfenate), dichlorfenapyr (dichlorfenapyr), dichlorfenapyr (bensulide), bensulide (bensulide), bensulide (bensulbensulide), bensulbensulide (bensulide), bensulide (bensulbensulbensulide (bensulbensulide), bensulbensulide (bensulide (bensulbensulbensulbensulide (bensulbensulide), bensulbensulbensulide), bensulbensulide (bensulbensulbensulide (bensulbensulbensulbensulbensulide), bensulide (bensulide), bensulbensulide (bensulide), bensulide (bensulbensulbensulide), bensulbensulbensulbensulide (bensulide), bensulide (bensulide), bensulbensulide (bensulbensulbensulide), bensulbensulbensulbensulbensulbensulbensulbensulbensulbensulbensulbensulbensulide (bensulbensulbensulide (bensulbensulbensulbensulbensulbensulbensulide (bensulide), bensulbensulide (bensulide (bensulbensulide), bensulide (bensulbensulbensulbensulide), bensulbensulbensulide (bensulbensulbensulbensulbensulide (bensulbensulbensulbensulbensulbensulbensulide (bensulide), bensulide (bensulide), bensulbensulide), bensulbensulbensulide (bensulbensulide (bensulide), ben, At least one of Isoxadifen-ethyl and N-phenyl-sulfonyl benzoic acid amide.

Some safeners are known to act as herbicides and, accordingly, to act to protect crop plants in addition to having a herbicidal effect on harmful plants.

The weight ratio of the herbicidal compositions according to the invention for controlling paddy-field weeds to safeners generally depends on the application rate of the herbicide and the effect of the safeners and can be varied within wide limits, for example within the range from 90000: 1 to 1: 5000, preferably within the range from 7000: 1 to 1: 1600, in particular within the range from 3000: 1 to 1: 500, in particular within the range from 1:100 to 20: 1. Safeners can be formulated with compound a and compound B as finished formulations or supplied and used as tank mixes with the herbicidal compositions.

The herbicidal composition for controlling paddy field weeds according to the present invention may further comprise various active compounds of other components, for example, selected from the group consisting of fungicides, insecticides, acaricides, nematocides, bird repellents, soil conditioners, and plant growth regulators.

The invention provides an application of a weeding composition for preventing and controlling weeds in paddy fields in preventing and controlling undesired plant germination or growth.

The invention provides an application of a weeding composition for preventing and controlling weeds in a paddy field in preventing and controlling the germination or growth of undesirable plants in broadleaf weeds, cyperaceae weeds and gramineous weeds.

The undesirable plants in the paddy field are selected from: brachypodium flaccida (Broadleaf signalgrass), Digitaria sanguinalis (L.) Scop), Echinochloa crusgalli (L.) P.Beauv.), Echinochloa crusgalli (Echinochloa odorata (L.) Orychiaceae), Echinochloa cruzi (Isochamus rugosum Salisb.), Euphorbia japonica (L.) Nees, Euphorbia crispa (Leptochloa fasciata (L.) Gray.), Euphorbia crispa (Lam.) Gray), Cyperus diformis (Cyperus difformis L.), Cyperus rudis (Cyperus judae L.) Miq.S.Merr, Cyperus irhiza L.J., Cyperus L.var.L., Cyperus L.sp.var.sp.S.japonica (Amphyceae), Amano. crispus L.benthamella (Amano. sp., Orpicea), Orthophyceae L.japonica (Amethrum), Echinochloa. crispa (L., Orchis (L., Oreophyceae), Echinochloa (L., Echinaceae), Echinacea L., Echinacea (L., Echinacea (L.), (quinoa (pigweeds) and amaranth (amaranths), AMASS), Amaranthus rubra (Ammannia coccinea Rottb.), Ecliptae herba (Eclipta alba (L.) Hassk.) (derived from American fat day, ECLAL), Isopistia rosea (SW.)/Vall.), petunia (Ipomoea hederacea (L.) Jacq.), Populus deltoides (Monochoria korsakii Regel & Maack) (Monochoria, MOKA), Oakus communis (Monochoria vagiana), Potentilla nuda (Murdannia nudiflora (L.) and Brennen (Bryopia), Satalaria nodiflora (Rotalaria), Satararia japonica (Rotarohne) (variety, Saturella tulosa, Saturez.) and Sasanguifolia (variety of Saturez).

The herbicidal compositions for controlling paddy-field weeds of the present invention preferably exhibit a synergistic effect in the control of barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.), green bristlegrass (Setaria viridis (L.) Beauv.), Digitaria sanguinalis (L.) Scop.), Avena sativa (L.), Chenopodium album (L.), Stellaria media (L.) Cyr, Lupulus angusta (Schoenopectus juncoides Roxb.), Cyperus bifidus (Cyperus difformis L.) Med, Abutilus theuisticilus (Abutilus theiropennis) at a rate lower than when each compound is applied alone.

"undesirable plants" are understood to mean all plants which grow in places where their growth is not desired. These may be, for example, harmful plants (for example monocotyledonous or dicotyledonous weeds, grasses, cyperaceae or unwanted crop plants), including, for example, those which are resistant to certain herbicidally active compounds (for example glyphosate, glufosinate, atrazine, imidazolinone herbicides and sulfonylureas).

The present invention provides a method for controlling undesired vegetation, comprising: (i) the herbicidal composition for controlling paddy weeds of the present invention is applied to undesired plants or their growing sites before the undesired plants germinate (pre-emergence), (ii) after the undesired plants germinate (post-emergence), or (iii) at (i) and (ii).

A method for controlling undesired plants, wherein the compound (A) and the compound (B) in the herbicidal composition for controlling weeds in paddy fields of the present invention are applied to undesired plants or their growing field together or individually so as to control the germination or growth of the undesired plants.

When the weeding composition for preventing and treating the weeds in the paddy fields is used as a herbicide for paddy fields, the weeding composition can be used for soil treatment and stem leaf treatment under the condition of water accumulation.

When the weeding composition for preventing and treating the weeds in the paddy fields is used as a herbicide for dry farmlands, the weeding composition can be used for soil treatment, soil mixing treatment and stem leaf treatment.

The weeding composition for preventing and controlling the weeds in the paddy fields can be used as a herbicide for paddy fields and can also be used as a herbicide for dry fields.

Weeds in paddy fields include, for example,

weeds of the family of the ophthalmocaceae (Potamogenoceae), such as Eisenia veitchii (Potamonton sativtus);

alismataceae (Alismataceae) weeds such as Alisma orientale (Alisma canaticulatum), Arrowia short (Sagittaria pygmaea) and Sagittaria sagittifolia (Sagittaria trifolia);

gramineous (Gramineae) weeds such as moleplant seed (Leptochloa chinensis), barnyard grass (Echinochloa crus-galli) and barnyard grass (Echinochloa oryzicola), etc.;

cyperaceae (Cyperaceae) weeds such as equisetum vulgare (Eleocharis Kuroguwai), Iris florida (Scirpus juncoides), Sanjiang grass (Scirpus niponicus), Cyperus rotundus (Cyperus serotinus), Cyperus heterotropoides (Cyperus difformis), and the like;

lemnaceae (Lemnaceae) weeds such as Spirodela polyrhiza and Lemna paucicostata (Lemna paucicostata);

commelinaceae (Commelinaceae) weeds such as verruca vulgaris (Murdannia keisak) and the like;

weeds of the Pontederiaceae family (Pontederiaceae), such as Pontederiaceae (Monochoria korsakovii) and Monochoria vaginalis (Monochoria vagiana), etc.;

weeds of the family Hamamelidaceae (Eltinaceae), such as, for example, Hamamelidium (Elatine triandra);

lythraceae (Lythraceae) weeds such as Polyfloral Water (Ammannia multiflora) and Arthrodial (Rotala indica), etc.;

salicaceae (Oenotheraceae) weeds such as pseudosalix chinensis (Ludwigia epilobioides), etc.;

scrophulariaceae (Scrophulariaceae) weeds such as eyes (Dopatrium junceuum), strange lettuce (Linderniaphycidaria) and American motherwort (Lindernia dubia);

compositae (Compositae) weeds such as pennisetum alopecuroides (Bidens frontosa) and Bidens tripartita (Bidenscriptipartia).

The present invention also provides a method for controlling undesired vegetation, which comprises: (i) the herbicidal composition for controlling paddy weeds of the present invention is applied to undesired plants or their growing sites before the undesired plants germinate (pre-emergence), (ii) after the undesired plants germinate (post-emergence), or (iii) at (i) and (ii). Preferably, the application of the germinated undesired vegetation (e.g. broadleaf weeds, grasses, cyperaceae or undesired crop plants) is also carried out before the undesired vegetation germinates, irrespective of the growth period of the sown/planted crop.

The weeding composition for preventing and controlling the weeds in the paddy field, which comprises the compound (A) and the compound (B) with effective weeding amount, has the synergistic effect. A synergistic effect is observed when compound (a) and compound (B) are administered together or nearly simultaneously; a synergistic effect may also be observed when compound (a) and compound (B) are administered separately at different times; it is also possible to apply compound (a) and compound (B) sequentially, for example, either pre-emergence and post-emergence, or early post-emergence and then mid-or late post-emergence. It is preferred here to administer compound (a) and compound (B) jointly or virtually simultaneously, and particular preference is given to coadministration.

If the herbicidal composition for controlling paddy weeds of the present invention is applied to the soil surface before germination, the seedlings of weeds are completely prevented from germinating, or the weeds grow to the cotyledon stage, but then they stop growing, and finally die completely after two to four weeks.

If the herbicidal composition is applied to the green parts of the plants after germination, the growth likewise stops sharply within a relatively short time after the treatment and the weed plants remain in the growth phase at the point in time of application or they die completely after a certain time, in such a way that the competition caused by the weeds which are harmful to the crop plants is eliminated early and continuously.

For rice, the herbicidal composition for controlling paddy field weeds can also be applied in water, and then absorbed through soil, buds, and roots.

When compound (a) and compound (B) are co-administered, there is a synergistic effect. Here, the activity of the herbicidal composition for controlling paddy weeds is higher than the expected sum of the activities of the respective herbicides applied. The synergistic effect enables the application rate to be reduced, a broader spectrum of broadleaf weeds, grassy weeds and sedge plants to be controlled, the herbicidal action takes effect more quickly, lasts longer, better control of harmful plants is achieved by only one or a few applications, and the application period can be widened. The dosage used in the herbicidal composition for controlling paddy field weeds and the effective dosages of compound (a) and compound (B) can be adjusted to a lower level so as to minimize the effect on the soil. This allows the herbicidal compositions of the present invention to be applied not only to sensitive crops but also almost avoid groundwater contamination. The herbicidal compositions of the present invention allow for a significant reduction in the required application rate of the active ingredient.

The herbicidal composition for controlling paddy field weeds of the present invention can be applied in a conventional manner by using techniques well known to those skilled in the art. Methods of application include, but are not limited to, application to undesired plants or their locus of growth, for example to the area adjacent to the plants, as well as pre-emergence, post-emergence, foliar (strewing, directional, ribbon, spot, mechanical, flip-top or replanting), and application in water (strewing, spot, mechanical, water-jet, granular strewing, granular spot, shake flask or spray bottle) by hand, backpack, mechanical, tractor, or aerial (airplane, helicopter, drone) application methods.

The type of application depends in a well-known manner on the intended purpose; in any case, the technique should ensure the best possible distribution of the active ingredients in the herbicidal compositions for controlling paddy-field weeds according to the invention.

The present invention also provides a method for controlling undesired vegetation, which comprises applying the herbicidal composition for controlling paddy weeds of the present invention in the presence of plants of useful crops, seeds of useful crops or other propagating parts of useful crops.

Plants, crops, as referred to in the present invention include, but are not limited to, germinated seeds, emerging seedlings, plants emerging from vegetative propagules, immature plants and established plants.

If the active ingredient is not well tolerated by certain crops, the herbicidal compositions can be directed to spray with the aid of a spray device so that they contact the sensitive crop as little as possible when they reach the foliage or bare soil of the undesirable plants growing below.

The method of the invention is most preferably used for controlling weeds in the area where the crop is growing or will be used for growing the crop, by unwanted plants or their locus. When applied to a crop growing area, the application rate should be sufficient to control weed growth without causing serious permanent damage to the crop.

The application amount of the herbicidal composition for controlling paddy field weeds of the present invention varies depending on the application place, application time, application method, target weeds, useful crops and the like.

The application rate of compound (a) can vary within wide limits, for example from 0.1g to 1000g of a.i./ha (hereinafter, a.i./ha means "active substance/hectare" based on 100% pure active compound), preferably from 0.1 to 100g of a.i./ha, more preferably from 1 to 50g of a.i./ha, more preferably from 1 to 40g of a.i./ha. When the compounds (a) are used before sowing, before planting or pre-and post-emergence, they have a relatively broad spectrum of harmful plants to be controlled, for example annual and perennial monocotyledonous or dicotyledonous broadleaf weeds, grasses and cyperaceae, and also undesirable crop plants.

The application rate of compound (B) can vary within wide limits, for example from 10g to 2000g a.i./ha, preferably from 50 to 1500 g a.i./ha; it has better control effect on annual or perennial broadleaf weeds.

The invention also provides a weeding composition for preventing and controlling the weeds in the paddy field, and the active components comprise a compound (A) and a compound (B), a filling agent and/or a surfactant. In the herbicidal composition, the content of the compound (a) and the compound (B) is 1% to 90%, preferably 5% to 80%, more preferably 10% to 80%, more preferably 15% to 80%, more preferably 20% to 80%, more preferably 30% to 80%, more preferably 40% to 80% of the herbicidal composition.

The herbicidal composition for controlling weeds in paddy fields of the present invention can be converted into conventional formulations such as wettable powders, water-soluble granules, water-soluble liquids, emulsifiable concentrates, suspensions, microcapsules, microemulsions, aqueous emulsions, suspoemulsions, microcapsule suspension-suspensions, water-dispersible granules, ultra-low volume liquids, tablets, low volume dispersible granules, pills or dry suspensions.

According to the present invention, the term "bulking agent" refers to natural or synthetic organic or inorganic compounds that can be combined or associated with an active ingredient to make it easier to apply to a subject (e.g., a plant, crop or grass). Thus, the filler is preferably inert, at least should be agriculturally acceptable. The filler may be solid or liquid.

Suitable solid carriers are: for example, vegetable powders (for example, particles of soybean powder, starch, cereal powder, wood powder, bark powder, saw dust, walnut shell powder, bran, cellulose powder, coconut shell, corn cob and tobacco stalk, and residues after extraction of plant essence), clays (for example, kaolin, bentonite, acid china clay, etc.), and talc powders. Silica (for example, diatomaceous earth, silica sand, mica, hydrous silicic acid, calcium silicate), activated carbon, natural minerals (for example, pumice, attapulgite, zeolite, etc.), calcined diatomaceous earth, sand, plastic media (for example, polyethylene, polypropylene, polyvinylidene chloride, etc.), inorganic mineral powders such as potassium chloride, calcium carbonate, calcium phosphate, etc., chemical fertilizers such as ammonium sulfate, ammonium phosphate, urea, ammonium chloride, etc., and soil fertilizers, and these may be used alone or in combination of 2 or more.

Suitable liquid carriers may be selected from, for example, water, alcohols (e.g., methanol, ethanol, isopropanol, butanol, ethylene glycol, etc.), ketones (e.g., acetone, methyl ethyl ketone, diisobutyl ketone, cyclohexanone, etc.), ethers (e.g., diethyl ether, dioxane, methyl cellulose, tetrahydrofuran, etc.), aliphatic hydrocarbons (e.g., kerosene, mineral oil, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, mineral spirits, alkylnaphthalenes, chlorinated aromatic hydrocarbons, chlorinated aliphatic hydrocarbons, chlorobenzene, etc.), halogenated hydrocarbons, amides, sulfones, dimethyl sulfoxide, mineral and vegetable oils, animal oils, etc.

Suitable surfactants are emulsifiers, dispersants or wetting agents of an ionic or nonionic nature, or mixtures of these surfactants. Suitable examples of such surfactants include fatty alcohol-polyoxyethylene ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene higher fatty acid esters, phosphoric acid esters of polyoxyethylene alcohols or phenols, fatty acid esters of polyhydric alcohols, sodium alkylaryl sulfonates, naphthalenesulfonic acid polymers, lignosulfonates, high-molecular comb-shaped dendritic copolymers, butylnaphthalenesulfonates, alkylaryl sulfonates, sodium alkylsulfosuccinates, fats and oils, polyacrylic acid salts such as condensates of fatty alcohols with ethylene oxide and alkyltaurates, and protein hydrolysates. Suitable oligosaccharides or polymers are based, for example, on ethylene monomers, acrylic acid, polyoxyethylene or polyoxypropylene alone or in combination with, for example, (poly) alcohols or (poly) amines. When one of the active compounds and/or one of the inert carriers is insoluble in water and when applied in water, a surfactant must be present.

If appropriate, the herbicidal compositions according to the invention for controlling paddy-field weeds can also be present in further additional components, for example protective colloids, binders, adhesives, thickeners, thixotropic agents, penetrants, stabilizers, sequestering agents, complex-forming agents. In general, the active ingredient may be combined with any solid or liquid additive conventionally used for formulation purposes.

The herbicidal composition for controlling paddy field weeds of the present invention can be prepared by mixing the active ingredient with at least one of the following substances in a known manner: liquid or solid carriers, emulsifiers, dispersants, wetting agents and/or protective colloids, binders, adhesives, thickeners, thixotropic agents, penetrating agents, stabilizers, sequestering agents, complex-forming agents, water and further processing aids.

The herbicidal composition for controlling paddy field weeds of the present invention has a more easily usable form because the amounts of the components are already in the optimum ratio. In addition, the auxiliaries in the formulations can be adjusted to one another for optimization.

The weeding composition for preventing and controlling the weeds in the paddy field has the advantages that:

the herbicidal composition for controlling weeds in paddy fields of the present invention achieves the "synergistic" effect on weed control required by the skilled person in a particularly advantageous manner, even including certain weed species which are difficult to control. Moreover, application of the compositions according to the invention makes it possible to significantly reduce the application rates of the individual components of the combination and to reduce the phytotoxicity to the crop plants.

The herbicidal composition for controlling weeds in paddy fields of the present invention has been shown to be more effective when the herbicidal active ingredients are applied in combination than when applied alone. "synergistic" action means that two or more factors interact such that the effect when combined is greater than would be expected based on the response of each factor when applied separately.

Detailed Description

The invention will be further illustrated with reference to the following examples:

preparation example

In the formulation examples described below, the percentages are by weight, unless otherwise indicated.

Example 130% Oxazisulfuron-methyl +30% sodium 2-methyl-4-Chlorosulfonate dispersion

Weighing 30% of metazosulfuron-ethyl, 30% of 2-methyl-4-sodium chloride, 10% of dodecyl trimethyl ammonium salt, 8% of alkylphenol polyoxyethylene ether phosphate, 4% of sodium chloride, 4% of Arabic gum and the balance of attapulgite to 100%. The raw materials are uniformly mixed, and are crushed and granulated to prepare the water dispersible granule.

Example 25% Oxazisulfuron-methyl +50% sodium 2-methyl-4-Chlorosulfonate dispersion

Weighing 5% of metazosulfuron-methyl, 50% of 2-methyl-4-sodium chloride, 9% of dodecyl trimethyl ammonium salt, 6% of oleoyl methyl sodium taurate, 3% of ammonium sulfate, 5% of Arabic gum and the balance of kaolin to 100%. The raw materials are uniformly mixed, and are crushed and granulated to prepare the water dispersible granule.

Example 32% Oxazisulfuron +40% 2-methyl-4-chloro-sodium oil suspension

Weighing 2% of metazosulfuron-methyl, 40% of 2-methyl-4-sodium chloride, 11.5% of polyoxyethylene alkyl aryl ether, 4.5% of polyoxyethylene lauryl ether sodium carboxylate, 4% of polyvinyl alcohol and castor oil, and making up to 100%. The raw materials are mixed, and a high-dispersion and stable suspension system is formed after high-speed shearing dispersion and sanding by a sand mill, so that the oil suspending agent is prepared.

Example 42.5% oxazosulfuron +22.5% 2-methyl-4-chloro-sodium oil suspension

Weighing 2.5% of metazosulfuron-ethyl, 22.5% of 2-methyl-4-sodium chloride, 8.5% of polyoxyethylene lanolin alcohol, 6% of castor oil polyoxyethylene ether, 3% of magnesium aluminum silicate and palm oil, and supplementing to 100%. The raw materials are mixed, and a high-dispersion and stable suspension system is formed after high-speed shearing dispersion and sanding by a sand mill, so that the oil suspending agent is prepared.

Example 50.5% Oxazisulfuron-methyl +50% 2-methyl-4-Chlorosulfate emulsion

Weighing 0.5% of metazosulfuron-ethyl, 50% of 2-methyl-4-sodium chloride, 10% of methyl oleate, 5% of ethoxylated castor oil, 3% of calcium dodecylbenzene sulfonate and water to make up to 100%. Dissolving metazosulfuron in methyl oleate, and adding ethoxylated castor oil to obtain an oil phase; uniformly mixing 2-methyl-4-chloro sodium, calcium dodecyl benzene sulfonate and water to obtain a water phase; the oil phase was added to the aqueous phase under stirring to give a 0.5% oxazosulfuron +50% 2m 4 sodium chloride water emulsion.

Example 60.5% Susposulfuron +25% 2m 4 Chloroisobutyl Ether

Weighing 0.5 percent of metazosulfuron, 25 percent of 2-methyl-4-chloroisooctyl ester and SOLVESSO^TM10010%, dodecyl trimethyl ammonium salt 6.5%, naphthalene sulfonic acid formaldehyde condensate sodium salt 4%, ethoxylated castor oil 5%, xanthan gum 5%, propylene glycol 4%, n-octanol 3%, and water to make up to 100%. Grinding and/or shearing the metazosulfuron, the dodecyl trimethyl ammonium salt and water at a high speed to obtain the metazosulfuron suspending agent; 2-methyl-4-chloro-isooctyl ester, SOLVESSO^TM100. The ethoxylated castor oil is mixed and stirred evenly to obtain 2-methyl-4-chloroisooctyl ester missible oil; the obtained 2-methyl-4-chloroisooctyl ester missible oil is added into the metazosulfuron suspending agent to obtain 0.5 percent metazosulfuron and 25 percent 2-methyl-4-chloroisooctyl ester suspending emulsion.

Example 70.5% Oxazisulfuron +75% 2m 4 Chlorsodium granules

Weighing 0.5% of metazosulfuron-ethyl, 75% of 2-methyl-4-sodium chloride, 4% of dextrin and bentonite, and making up to 100%. The raw materials are mixed, extruded and granulated to prepare the granules.

Example 81% Oxazisulfuron +20% 2-methyl-4-chloroisooctyl ester emulsifiable concentrate

Weighing 1% of metazosulfuron-ethyl, 20% of 2-methyl-4-chloroisooctyl, 5% of ethoxylated castor oil, 3% of calcium dodecylbenzenesulfonate and 3% of SOLVESSO^TM200 to 100%. The components are prepared according to the proportion and are evenly stirred to obtain a uniform phase, and 1 percent of metazosulfuron-ethyl and 20 percent of 2-methyl-4-chloroisooctyl ester missible oil is obtained

Example 98% oxazosulfuron +64% 2-methyl-4-chloro sodium wettable powder

8 percent of metazosulfuron-ethyl, 64 percent of 2-methyl-4-sodium chloride, 5 percent of nonylphenol polyoxyethylene ether, 3 percent of calcium dodecylbenzene sulfonate and kaolin are weighed to complement to 100 percent. The wettable powder is prepared by mixing, grinding and airflow crushing the raw materials.

Example 100.5% wettable powder of metazosulfuron +75% 2-methyl-4-chloro sodium

Weighing 0.5% of metazosulfuron-ethyl, 75% of 2-methyl-4-sodium chloride, 10% of polyoxyethylene glyceryl monofatty acid ester, 5% of triphenylethylphenol polyoxyethylene ether and diatomite to make up to 100%. The wettable powder is prepared by mixing, grinding and airflow crushing the raw materials.

Example 111.5% oxazosulfuron +75% 2-methyl-4-chloro sodium dry suspension

Weighing 1.5% of metazosulfuron, 75% of 2-methyl-4-sodium chloride, 5% of alkyldimethylbenzyl ammonium, 5% of trisiloxane polyoxyethylene ether, 4% of polyvinyl alcohol, 3% of propylene glycol and 5% of silicone; kaolin to make up to 100%; mixing the active components and various assistants with water, forming a high-dispersion and stable suspension system after high-speed shearing dispersion and sanding by a sand mill to prepare the suspending agent, and drying the obtained suspension by a fluidized bed to obtain the dry suspending agent.

The proportion in the above examples is weight percent.

(II) herbicidal Activity test

The herbicidal activity of the herbicidal composition of the present invention passes the fourth part of the herbicide of "indoor bioassay test criteria for pesticides NY/T1155.4-2006: activity measurement test Stem and leaf spray method "measurement:

the plant varieties tested were as follows:

common wheat (Triticum aestivum (spring));

rice (Oryza sativa);

barnyard grass (Echinochloa crus _ galli (L.). P. Beauv.);

crab (Digitaria sanguinalis (L.)) is used;

chenopodium album L;

chickweed (Stellaria media (L.) Cyr.).

Test agents: preparing a reagent according to a certain weight percentage: 1. metazosulfuron; 2. 2-methyl-4-chloro-sodium; 3. 2-methyl-4-chloroisooctyl ester; 4. metazosulfuron + 2-methyl-4-chloro sodium; 5. metazosulfuron + 2-methyl-4-chloroisooctyl ester; then, each of the reagents was diluted with water to obtain a diluted drug solution.

The test method comprises the following steps: the method comprises the steps of filling a nutrition pot with the height of 10cm and the diameter of 8cm with a certain amount of soil, sowing 15-20 seeds of a plant variety to be tested into the nutrition pot, and covering the seeds with about 0.5cm of soil. In 4-6 leaf stage of weed, spraying 2ml of the pesticide solution in each pot, repeating the treatment for 4 times, and setting the treatment without pesticide as blank control. Transferring the plant leaves into a greenhouse for conventional culture after the liquid medicine on the surfaces of the plant leaves is naturally air-dried, and watering regularly. The fresh weight inhibition rate of each treatment was investigated 21 days after the treatment:

the combined effect of the compositions was then calculated by the Colby formula in "indoor bioassay test criteria for pesticides NY-T1155.7-2006 criteria herbicide part 7 compounded combined effect assay":

x is the control effect when compound a is applied at an application rate of m, expressed as a percentage of the untreated control group;

y is the control effect when compound B is applied at an application rate of n, expressed as a percentage of the untreated control group;

E₀is the theoretical control effect when compound a and compound B are applied at application rates of m and n, expressed as a percentage of the untreated control group.

If the actual weed control rate (E) observed in the bioassay exceeds the theoretical control effect calculated using the Colby's method (E)₀) It means that the efficacy of the herbicidal composition is greater than the sum of the efficacies of the ingredients, which means that the composition has a synergistic effect.

Test one: control of barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.)

The weeding composition (metazosulfuron + 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester) for preventing and controlling the weeds in the paddy field has the control effect on barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.):

TABLE 1

The test results in table 1 show: the prophylactico-pyrazosulfuron-ethyl and 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester show obvious synergistic effect on the control effect of barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.) in the range of 1:10-1: 50.

And (2) test II: prevention and treatment of crab grass (Digitaria sanguinalis (L.) Scop.)

The weeding composition (metazosulfuron + 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester) for preventing and controlling the weeds in the paddy field has the control effect on the crab of Digitaria sanguinalis (L.):

TABLE 2

The test results in table 2 show: the metazosulfuron and the 2-methyl-4-chloro sodium or the 2-methyl-4-chloro isooctyl ester have obvious synergistic effect on the control effect of Digitaria sanguinalis (L.) Scop within the range of 1:10-1: 50.

And (3) test III: control effect on Chenopodium album L

The weeding composition (metazosulfuron + 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester) for preventing and controlling the weeds in the paddy field has the control effect on Chenopodium album L:

TABLE 3

The test results in table 3 show that: the metazosulfuron and 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester have obvious synergistic effect on the control effect of Chenopodium album L within the range of 1:10-1: 50.

And (4) testing: prevention and cure for chickweed (Stellaria media (L.) Cyr.)

The weeding composition (metazosulfuron + 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester) for preventing and controlling the weeds in the paddy field has the prevention effect on chickweed (Stellaria media (L.) Cyr.):

TABLE 4

The test results in table 4 show: the metazosulfuron and 2-methyl-4-chloro sodium or 2-methyl-4-chloro isooctyl ester have obvious synergistic effect on the control effect of chickweed (Stellaria media (L.) Cyr.) in the range of 1:10-1: 50.

In addition, the combination of metazosulfuron and 2-methyl-4-chloro and its derivatives was tolerated by wheat and rice without unacceptable toxicity by safety observations on common wheat (wheat), and rice (Oryza sativa).

Claims

1. The weeding composition for preventing and treating the weeds in the rice fields is characterized in that an active component consists of a compound (A) and a compound (B), wherein the compound (A) is metazosulfuron or salt thereof, the compound (B) is 2-methyl-4-chloro-sodium or 2-methyl-4-chloro-isooctyl ester, and the weight ratio of the compound (A) to the compound (B) is 1:10-1: 50.

2. The herbicidal composition for controlling paddy weeds of claim 1, wherein the weight ratio of the compound (a) to the compound (B) is 1:15 to 1: 50.

3. The herbicidal composition for controlling paddy weeds of claim 1, wherein the weight ratio of the compound (a) to the compound (B) is 1:20 to 1: 50.

4. The herbicidal composition for controlling paddy field weeds as claimed in claim 1, wherein the content of the compound (a) and the compound (B) is 40% to 80% of the herbicidal composition.

5. The herbicidal composition for controlling paddy field weeds of claim 1, further comprising a filler and/or a surfactant.

6. The herbicidal composition for controlling paddy field weeds as claimed in claim 1, wherein the formulation is wettable powder, water-soluble granules, water-soluble liquid, emulsifiable solution, suspension, microcapsules, microemulsion, aqueous emulsion, suspoemulsion, microcapsule suspension-suspension, water-dispersible granules, ultra-low volume liquid, tablets, low volume dispersible granules, pills or dry suspension.

7. Use of the herbicidal composition for controlling paddy weeds of claim 1 for controlling undesired germination or growth of plants.

8. Use of the herbicidal composition for controlling paddy field weeds in claim 1 for controlling undesired germination or growth of plants among grassy weeds, sedge weeds, and broadleaf weeds.

9. Use of the herbicidal composition for controlling paddy-field weeds according to claim 1 for controlling undesired germination or growth of barnyard grass (Echinochloa crus _ galli (L.) P. Beauv.), green foxtail (Setaria viridis (L.) Beauv.), crab grass (Digitaria sanguinalis (L.) Scop.), wild oat (Avena fatua L.), Chenopodium album (L.), chickweed (Stellaria media (L.) Cyr.), Iris florida (Schoenopectus juncoides Roxb.), and Cyperus difformis (Cyperus difformis L.).

10. A method for controlling undesired plants, which comprises applying the herbicidal composition for controlling weeds in paddy fields according to claim 1 to undesired plants or a growing field thereof so as to control germination or growth of the undesired plants.

11. A method of controlling undesirable vegetation, comprising: (i) the herbicidal composition for controlling paddy weeds of claim 1 is applied to undesired plants or a growing field thereof before the undesired plants germinate (pre-emergence), (ii) after the undesired plants germinate (post-emergence), or (iii) at the time of (i) and (ii) so as to control the undesired plants from germinating or growing.

12. A method for controlling undesired plants, which comprises contacting the undesired plants or a place where they grow with the herbicidal composition for controlling paddy weeds of claim 1.

13. A method for controlling undesired plants, which comprises applying the herbicidal composition for controlling paddy weeds of claim 1 to soil or water to control the germination or growth of undesired plants.

14. A method for controlling undesired plants, which comprises applying the compound (a) and the compound (B) in the herbicidal composition for controlling paddy weeds of claim 1 to undesired plants or a field thereof together or separately so as to control germination or growth of the undesired plants.

15. A method for controlling undesired plants, which comprises applying the compound (a) and the compound (B) in the herbicidal composition for controlling paddy weeds of claim 1 to soil or water together or separately to control the germination or growth of undesired plants.

16. A method for controlling undesired plants, which comprises applying the herbicidal composition for controlling paddy weeds of claim 1 in the presence of plants of useful crops, seeds of useful crops or other reproductive parts of useful crops.

17. A method for controlling undesired plants, which comprises adding the herbicidal composition for controlling weeds in paddy fields according to claim 1 to irrigation water and applying it to the undesired plants or their growing sites by using a ground or aerial powder sprayer, a granule spreader.