JP7126372B2 - weed control composition - Google Patents

Description

The present invention relates to weed control compositions. More specifically, the present invention relates to a weed control composition capable of highly efficiently suppressing the elongation growth of unwanted plants such as weeds and maintaining a low plant height for a long period of time.

Herbicides are pesticides used to kill unwanted plants such as weeds. On the other hand, herbicides are pesticides used to suppress the elongation growth of unwanted plants such as weeds and to maintain low plant heights without completely withering the plants. Herbicides contribute to, for example, maintenance of vegetation in plant communities, prevention of soil erosion due to denudation, and reduction of labor such as mowing.

As a possible herbicide or plant growth regulator, for example, Patent Document 1 discloses a broadleaf perennial weed control agent for lawns containing flupoxam as an active ingredient.
Patent Document 2 discloses a mixed herbicide containing at least one of the group consisting of benfluralin, pendimethalin, trifluralin and dichlobenil, and flupoxam as active ingredients.

Patent Document 3 discloses a herbicidal composition or a plant growth regulator composition characterized by containing, as active ingredients, flurprimidol and one or more compounds having herbicidal activity or plant growth regulating action. disclosed. Napropamide, flupoxam, glufosinate and the like are exemplified as compounds having herbicidal activity or plant growth regulating activity.
Patent Document 4 discloses a plant growth regulator characterized by containing a brassinosteroid biosynthesis inhibitor and a gibberellin biosynthesis inhibitor as active ingredients. Flurprimidol and the like are exemplified as gibberellin biosynthesis inhibitors.
US Patent No. 5,200,004 contains a mixture of synergistically effective amounts of one or more non-selective herbicides and one or more plant growth regulators, or mixtures thereof, on weeds or on land in which weeds are present. Disclosed is a method of controlling weeds comprising applying the composition. Gibberellin biosynthesis inhibitors have been indicated as plant growth regulators.

JP 2014-156471 A JP-A-7-233013 JP 2010-275205 A JP 2015-67548 A Japanese Patent Publication No. 2011-510054

An object of the present invention is to provide a weed control composition and a weed control method capable of highly efficiently suppressing the elongation growth of unwanted plants such as weeds and maintaining a low plant height for a long period of time.

As a result of investigations to achieve the above object, the present invention including the following aspects has been completed.

[1] A weed control composition containing flupoxam and a gibberellin biosynthesis inhibitor.
[2] A method for controlling weeds, which comprises applying to a plant a weed control composition containing flupoxam and a gibberellin biosynthesis inhibitor, respectively, simultaneously or before or after the out-of-order phase, or containing flupoxam and a gibberellin biosynthesis inhibitor.

INDUSTRIAL APPLICABILITY The weed control composition of the present invention can highly efficiently suppress the elongation growth of unwanted plants such as weeds and maintain low plant height for a long period of time. According to the weed suppression method of the present invention, it is possible to highly efficiently suppress the elongation growth of unnecessary plants such as weeds and maintain low plant heights for a long period of time.

The weed control composition of the present invention contains flupoxam and a gibberellin biosynthesis inhibitor.

Flupoxam (alias: 1-[4-chloro-3-(2,2,3,3,3-pentafluoropropoxymethyl)phenyl]-5-phenyl-1H-1,2,4-triazole-3-carboxamide) is known as a cell wall (cellulose) synthesis inhibitor, and is known to have an action to control grass weeds, broadleaf annual weeds, broadleaf perennial weeds and the like. Examples of commercially available flupoxam preparations include "Conclude Granule Wettable Powder" (trade name) and "Graffiti Granule Wettable Powder" (trade name).

Gibberellin is a substance that is said to be involved in promotion of cell elongation in the direction of the growth axis, promotion of seed germination, promotion of breakthrough of seed dormancy, suppression of seed senescence, promotion of action of auxin, and the like. Examples of gibberellin biosynthesis inhibitors include daminozit, mepiquat chloride, chlormequat, flurprimidol, paclobutrazole, uniconazole P, trinexapac-ethyl, prohexadione calcium salt, and inabenfide. Of these, fluruprimidol is preferred. Fluruprimidol (also known as 2-methyl-pyrimidin-5-yl-1-(4-trifluoromethoxyphenyl)propan-1-ol) suppresses growth of Japanese turf, bentgrass, annual weeds, perennial weeds, etc. It is known to have the effect of Examples of commercially available flurprimidol preparations include "Greenfield Wettable Powder" (trade name).

In the weed control composition of the present invention, the amount of the gibberellin biosynthesis inhibitor relative to 1 part by mass of flupoxam is not particularly limited, but is preferably 0.05 to 20 parts by mass, more preferably 0.1 to 10 parts by mass, and further It is preferably 0.2 to 5 parts by mass.

In addition to flupoxam and gibberellin biosynthesis inhibitors, the herbicide composition of the present invention contains known fungicides, insecticides, acaricides, herbicides, plant growth regulators, fertilizers, safeners, and the like. They can also be mixed and used. In particular, when used in combination with a herbicide, it is possible to reduce the amount used and maintain the weed control effect. Moreover, not only labor saving but also higher effects can be expected due to the synergistic action of the mixed drugs. Combinations with a plurality of further known herbicides are then also possible.

Other herbicidally active ingredients that can be used in the present invention include, for example, the following. Even if there is no particular description, these herbicidally active ingredients naturally include salts, alkyl esters, various structural isomers such as optical isomers, etc., if they exist.
(a) clodinafop-propargyl, cyhalofop-butyl, diclofop-methyl, fenoxaprop-P-ethyl, fluazifop-P P), fluazifop-P-butyl, haloxyfop-methyl, pyrifenop-sodium, propaquizafop, quizalofop-P-ethyl P-ethyl), aryloxyphenoxypropionic acid esters such as metamifop; alloxydim, butroxydim, clethodim, cycloxydim, profoxydim, sethoxydim Cyclohexanediones such as , tepraloxydim and tralkoxydim; Phenylpyrazolines such as pinoxaden; .

(b) amidosulfuron, azimsulfuron, bensulfuron-methyl, chlorimuron-ethyl, chlorsulfuron, cinosulfuron, cyclosulfame; cyclosulfamuron, ethametsulfuron-methyl, ethoxysulfuron, flazasulfuron, flupyrsulfuron, foramsulfuron, halosulfuron-methyl ), imazosulfuron, iodosulfuron-methyl, mesosulfuron, mesosulfuron-methyl, metsulfuron-methyl, nicosulfuron, oxasulfuron ), primisulfuron, prosulfuron, pyrazosulfuron-ethyl, rimsulfuron, sulfometuron-methyl, sulfosulfuron, thifen thifensulfuron-methyl, triasulfuron, tribenuron-methyl, trifloxysulfuron, triflusulfuron-methyl, tritosulfuron, orthosulfamuron, propyrisulfuron, flucetosulfuron, metazosulfuron, methiopyr sulfuron, monosulfuron-methyl, orsosulfuron, iofensulfuron; imazapic, imazamethabenz, imazamox-ammonium imidazolinones such as , imazapyr, imazaquin, imazethapyr; cloransulam-methyl, diclosulam, florasulam, flumetsulam, metosulam triazolopyrimidine sulfonamides such as , penoxsulam, pyroxsulam, metosulfam; bispyribac-sodium, pyribenzoxim, pyriftalid, pyrithiobac-sodium pyrimidinyl (thio)benzoates such as -sodium), pyriminobac-methyl, pyrimisulfan; flucarbazone, propoxycarbazone, thiencarbazone-methyl sulfonylaminocarbonyltriazolinones, such as; sulfonanilides, such as triafamone; What is supposed to be.

(c) ametrine, atrazine, cyanazine, desmetryne, dimethametryn, prometon, prometryn, propazine series (propazine), CAT (simazine) triazines such as (simazine), simetryn, terbumeton, terbuthylazine, terbutryne, trietazine, atratone, cybutryne; hexazinone, metamitrone triazinones such as (metamitron) and metribuzin; triazolinones such as amicarbazone; uracils such as bromacil, lenacil and terbacil; pyridazinone series; carbamate series such as desmedipham, phenmedipham, swep; chlorobromuron, chlorotoluron, chloroxuron, dimefuron, DCMU ( diuron, ethidimuron, fenuron, fluometuron, isoproturon, isouron, linuron, methabenzthiazuron, metobromuron, Ureas such as metoxuron, monolinuron, neburon, siduron, tebuthiuron, metobenzuron, karbutilate; DCPA (propanil), CMMP (penta Nokrol amides such as cypromid; nitriles such as bromofenoxim, bromoxynil, ioxynil; benzothiadiazinones such as bentazone Phenylpyridazines such as pyridate and pyridafol; Others such as methazole, which are said to exhibit herbicidal efficacy by inhibiting plant photosynthesis.

(d) Bipyridylium compounds such as diquat and paraquat; and other compounds that are said to exhibit rapid herbicidal activity by becoming free radicals in the plant body and generating active oxygen.

(e) acifluorfen-sodium, bifenox, clomethoxynil (chlomethoxyfen), fluoroglycofen, fomesafen, halosafen, lactofen , oxyfluorfen, nitrofen, ethoxyfen-ethyl, etc.; phenylpyrazoles, such as fluazolate, pyraflufen-ethyl; N-phenylphthalimides such as ethyl, flumioxazin, flumiclorac-pentyl, and chlorphthalim; thiadiazoles such as fluthiacet-methyl and thidiazimin; oxadiazone oxadiazoles such as oxadiazon, oxadiargyl; triazolinones such as azafenidin, carfentrazone-ethyl, sulfentrazone, bencarbazone; oxazolidinediones such as pentoxazone; pyrimidinediones such as benzfendizone and butafenacil; sulfonylamides such as saflufenacil; pyridazines such as flufenpyr-ethyl; In addition, pyrachlonil, profluazol, tiafenacil, trifludimoxazin, etc., inhibit chlorophyll biosynthesis in plants and cause abnormal accumulation of photosensitized peroxides in plants. It is said that the herbicidal effect is shown by

(f) pyridazinones such as norflurazon, metflurazon; pyridinecarboxamides such as diflufenican, picolinafen; mesotrione, sulcotrione, tefuryltrione; triketones such as tembotrione, bicyclopyrone and fenquinotrione; isoxazoles such as isoxachlortole and isoxaflutole; benzofenap, Pyrazoles, such as pyrazolates (pyrazolynate), pyrazoxyfen, topramezone, pyrasulfotole, tolpyralate; triazoles, such as ATA (amitrol); isoxazolidinones such as clomazone; diphenyl ethers such as acronifen; other beflubutamid, fluridone, flurochloridone, flurtamone, benzobicyclone, methoxyphenone ( methoxyphenone), ketospiradox, and other carotenoids, which are said to inhibit plant pigment biosynthesis and exhibit herbicidal efficacy characterized by bleaching action.

(g) glycines such as glyphosate, glyphosate-ammonium, glyphosate-potassium, glyphosate-isopropylamine, glyphosate trimesium (sulfosate); ; other EPSP synthase inhibitors
(h) Glutamine synthetase inhibitors such as phosphinic acids such as glufosinate, glufosinate-ammonium, glufosinate-P-sodium, bialaphos (bilanafos) and other It is said to show herbicidal efficacy by inhibiting amino acid biosynthesis in plants.

(i) carbamates such as aslam; other DHP (dihydropteroic acid) synthase inhibitors

(j) bethrosin (benfluralin), butralin, dinitramine, ethalfluralin, oryzalin, pendimethalin, trifluralin, nitralin, Dinitroanilines such as prodiamine; Phosphoramidates such as amiprofos-methyl and butamifos; Pyridines such as dithiopyr and thiazopyr; Propyzamide ), tebutam and other benzamides; chlorthal, TCTP (chlorthal-dimethyl) and other benzoic acids; IPC (chlorpropham), propham, carbetaamide ( carbetamide), carbamate such as barban; arylalanine such as flamprop-M, flamprop-M-isopropyl; acetochlor, alachlor ( alachlor, butachlor, dimethachlor, dimethenamid, dimethenamid-P, metazachlor, metolachlor, S-metolachlor, petoxamide chloroacetamides such as pethoxamid, pretilachlor, propachlor, propisochlor, thenylchlor; acetamides such as diphenamid, napropamide, naproanilide oxyacetamides such as flufenacet, mefenacet; fentraza tetrazolinones such as fentrazamide; other anilofos, indanofan, caffenstrole, piperophos, methiozolin, fenoxasulfone, pyroxasulfone, It shows herbicidal efficacy by inhibiting plant microtubule polymerization, microtubule formation, and cell division, such as ipfencarbazone, or by inhibiting Very Long Chain Fatty Acid (VLCFA) biosynthesis. what is being done.

(k) Nitriles such as DBN (dichlobenil), DCBN (chlorthiamide); benzamides such as isoxaben; triazolocarboxamides; quinoline carboxylic acids such as quinclorac; It is said to show herbicidal efficacy by inhibiting cell wall (cellulose) synthesis such as triaziflam and indaziflam.

(l) Dinitrophenols such as DNOC, DNBP (dinoseb), dinoterb, etc.; other substances that are said to exhibit herbicidal efficacy through uncoupling (membrane disruption).

(m) butylate, hexylthiocarbam (cycloate), dimepiperate, EPTC, esprocarb, molinate, orbencarb, pebulate, prosulfocarb ( thiocarbamates such as prosulfocarb, bentocarb (thiobencarb), tiocarbazil, triallate, vernolate, diallate; phosphorodithios such as SAP (bensulide); benzofurans such as benfuresate and ethofumesate; chlorocarbonates such as TCA, DPA (dalapon) and tetrapion (flupropanate); and other plant lipid biosynthesis. Those that are said to exhibit herbicidal efficacy by inhibiting them.

(n) phenoxycarboxylic acids such as clomeprop, 2,4-PA(2,4-D), 2,4-DB, dichlorprop, MCPA, MCPB, MCPP (mecoprop); chloramben, MDBA (dicamba), TCBA (2,3,6-TBA) and other benzoic acids; clopyralid, aminopyralid, fluroxypyr, picloram pyridine carboxylic acids such as , triclopyr, and halauxifen; quinoline carboxylic acids, such as quinclorac and quinmerac; NPA (naptalam), diflufenzopyr ( phthalamate semicarbazones such as diflufenzopyr; It is said to show herbicidal efficacy by disturbing the hormonal action of plants.

(o) arylaminopropionic acids such as flamprop-isopropyl; pyrazoliums such as difenzoquat; organic arsenic such as DSMA, MSMA; other bromobutide, (chlor)- chlorflurenol, cinmethylin, cumyluron, dazomet, daimuron, methyl-dymron, etobenzanid, fosamine, oxaziclomefone, oleic acid oleic acid, pelargonic acid, pyributicarb, endothal, sodiumchlorate, metam, quinoclamine, cyclopyrimorate, tridiphan herbicides such as tridiphane, clacyfos.

Safeners that can be used in the present invention include, for example, benoxacor, cloquintocet, cloquintocet-mexyl, cyometrinil, cyprosulfamide (cyprosulfamide), dichlormid, dicyclonon, dietholate, fenchlorazole, fenchlorazole-ethyl, fenclorim, flurazole, fluxofenim , furilazole, isoxadifen, isoxadifen-ethyl, mefenpyr, mefenpyr-diethyl, mephenate, naphthalic anhydride ), oxabetrinil, and the like.

The weed-suppressing composition of the present invention may be formulated into formulations generally available as an agricultural chemical, such as wettable powders, granules, powders, emulsions, aqueous solutions, suspensions, and flowables.

Known additives or carriers can be used for formulation.
When formulating into a solid dosage form, vegetable powders such as soybean flour and wheat flour, fine mineral powders such as diatomaceous earth, apatite, gypsum, talc, bentonite, pyrophyllite, and clay, sodium benzoate, urea, and mirabilite. Organic and inorganic compounds such as can be used.

Petroleum fractions such as kerosene, xylene and solvent naphtha, cyclohexane, cyclohexanone, dimethylformamide, dimethyl sulfoxide, alcohol, acetone, trichlorethylene, methyl isobutyl ketone, mineral oil, vegetable oil, water when formulated into a liquid dosage form. etc. can be used.

In formulation, a surfactant can be added as necessary. As surfactants, alkylphenyl ethers to which polyoxyethylene is added, alkyl ethers to which polyoxyethylene is added, higher fatty acid esters to which polyoxyethylene is added, sorbitan higher fatty acid esters to which polyoxyethylene is added, and polyoxyethylene. Nonionic surfactants such as added tristyrylphenyl ethers, sulfate ester salts of alkylphenyl ethers added with polyoxyethylene, alkylnaphthalenesulfonates, polycarboxylates, ligninsulfonates, alkylnaphthalenesulfonates formaldehyde condensates, isobutylene-maleic anhydride copolymers, and the like.

The amount of flupoxam and gibberellin biosynthesis inhibitor contained in the weed control composition of the present invention is not particularly limited, and can be appropriately set according to the dosage form. For example, the total content of flupoxam and gibberellin biosynthesis inhibitor in the wettable powder is preferably 5-90% by weight, more preferably 10-85% by weight. The total content of flupoxam and gibberellin biosynthesis inhibitors in the emulsion is preferably 3-70% by weight, more preferably 5-60% by weight. The total content of flupoxam and gibberellin biosynthesis inhibitors in the granules is preferably 0.01 to 50% by weight, more preferably 0.05 to 40% by weight.

[Formulation example]
Some formulation examples relating to the weed control composition of the present invention are shown, but the active ingredient compounds, additives and addition ratios are not limited to these examples, and can be changed in a wide range. Parts in the formulation examples indicate parts by weight.

(Formulation Example 1) Wettable powder Flupoxam and Flurprimidol 20 parts White carbon 20 parts Diatomaceous earth 52 parts Sodium alkyl sulfate 8 parts The above ingredients are uniformly mixed and finely pulverized to give a total of 20% flupoxam and flurprimidol. A wettable powder containing is obtained.

(Formulation Example 2) Emulsion Flupoxam and Flurprimidol 20 parts Xylene 55 parts Dimethylformamide 15 parts Polyoxyethylene phenyl ether 10 parts The above are mixed and dissolved to obtain an emulsion containing 20% flupoxam and flurprimidol in total. .

(Formulation Example 3) Granules Flupoxam and Fluruprimidol 5 parts Talc 40 parts Clay 38 parts Bentonite 10 parts Sodium alkyl sulfate 7 parts The above ingredients are uniformly mixed and finely pulverized, and then formed into a diameter of 0.5 to 1.0 mm. Granulate to obtain granules containing 5% total of flupoxam and flurprimidol.

The weed control method of the present invention comprises applying to a plant either flupoxam and a gibberellin biosynthesis inhibitor, respectively, simultaneously or before or after out of sequence, or a weed control composition containing flupoxam and a gibberellin biosynthesis inhibitor. When applying flupoxam and gibberellin biosynthesis inhibitor respectively, formulations of flupoxam and gibberellin biosynthesis inhibitor respectively may be used. Wettable powders or emulsions are diluted with water to a predetermined concentration to form suspensions or emulsions, while granules are left as they are and sprayed or mixed on soil or foliage before or after weed germination. can do.

In the method of suppressing weeds of the present invention, flupoxam and gibberellin biosynthesis inhibitors are applied to various types of non-agricultural lands such as agricultural lands such as fields, orchards and ridges, lawns, playgrounds, vacant lots, roadsides, and railroad ends. Can be applied to weeds.

In the weed control method of the present invention, it is preferable to apply the flupoxam and the gibberellin biosynthesis inhibitor in a total amount of 0.1 g or more per hectare. For example, flupoxam is preferably applied in an amount of 10 to 10,000 g, more preferably 100 to 5,000 g per hectare, depending on the type of plant to be controlled. The gibberellin biosynthesis inhibitor is applied in an amount of 10-20000 g per hectare, preferably 100-15000 g per hectare.

Weeds to which the present invention can be applied are as follows.
Solanaceae weeds represented by Solanum nigrum and Datura stramonium, Geraniaceae weeds represented by Granium caroli nianum, Abutilon theophrasti and America Malvaceae weeds represented by Sida sp inosa, Ipomoea spps such as Ipomoea purpurea, Convolvulaceae represented by Calystegia spps. Convolvulaceae) weeds, Amaranthus lividus and Amaranthus retroflexus, weeds of the Amaranthaceae family represented by Amaranthus retroflexus, xanthium pensylvanicum, Xanthium occidentale, ragweed (Ambrosia artemisiaefolia), sunflower (Helianthus annuus) , Galinsoga ciliata, Cirsium arvense, Senecio vulgaris and Erigeron annus, Bidens frondosa and Bidens tripartita, Tar axacum officinale, Conyza sumatr ensis), Artemisia indica var. maximowiczii, Conyza canadensis, Erigeron philadelphicus, Eclipta thermalis, Aster yomena, Solidago canadensis, Jerusalem artichoke (Helianthus tuberosus), and Compositae weeds represented by Cosendangsa (Bidens pilosa var. Pilosa), dog mustard (Roripp a in dica), Sinapis arvensis, Capsella Bursapastoris and Cardamine flexuosa, etc. Cruciferae weeds, Polygonum Blumei, Persicaria lapathifolia, Japanese knotweed ( Polygonaceae weeds represented by Fallopia japonica), Rumex japonicus, and Poly gonum convolvulus, Portulacaceae weeds represented by Portulaca oleracea, Chenopodium album ), Chenopodiaceae (Chenopodiaceae) weeds represented by Chenopodium ficifolium and Kochia scoparia, Caryophyllaceae weeds represented by Stellaria media, etc. Scrophulariaceae weeds represented by Dopatrium junceum, Gratiola japonica, Limnophila sessilifolia, Lindernia pyxidaria and Lindernia dubia, Commelina communis and Murdannia keisak Comme linaceae weeds represented by ) etc., Labiatae weeds represented by Lamium amplexicaule and Lamium purpureum, Euphorbia supina and Euphorbia maculata etc. Euphorbiaceae (Eup horbiaceae) weeds represented by Family (Rubiaceae) weeds, Violaceae (Violaceae) weeds represented by violets (Viola mandshurica), etc., Aeschynomene indica, Sesbania exaltata, Cassia obtusifolia, Trifolium repens, Yahazusou (Lespedeza striata), Vicia sepium and Pueraria montana (Legumi nosae) weeds, Oxsalis courniculata (Oxsaldaseae) weeds, wild sorghum ( Sorgham bicolor), giant millet (Panicum dichotomiflorum), Johnson grass (Sorghum halepense), barnyard grass (Echinochloa crus-galli var. crus-galli), barnyard barnyard grass (Echinochloa crus-galli var. Paspalum distichum, Echinochloautilis, Digitaria ciliaris, Eleusine indica, Digitaria violascens, Cynodon dactylon, Zoysia japonica, Zoysia pacifica, Sporobolus fertilis), Beckmannia syzigachne, Ave na fatua, Avena sativa, Italian ryegrass (Lolium multiflorum), blackgrass (Alopecurus myosuroides), weeping lovegrass (Eragrostis curvula), imperata cylindrica, Miscanthus sinensis, Miscanthus sacchariflorus, green foxtail ( Setaria viridis, Setaria faberi, Phleum pratense, Festuca arundinacea, Anthoxanthum odoratum, Themeda japonica, Agrostis gigantea, Leptochloa chinensis, Dactylis glomerata ), Elymus tsukushiensis var. transiens, Phalaris arundinacea, Pleioblastus chino, Homalocenchrus japonocus, Poa annua and Alopecurus aegualis weeds), Cyperus rotundus, Cyperus esculentus, Eleocharis kuroguwai, Scirpus juncoides, Scirpus nipponicus, Cyperus serotinus, Cyperus difformis, Cyperus iria, Cyperus iria Cyperaceous weeds represented by Cyperus hakonensis and Cyperus brevifolius, Kyllinga brevifolia, etc., Potamogetonaceae weeds represented by Potamoget on distinctus, Alisma canaliculatum, Urikawa Alismataceae weeds represented by (Sagittaria pygmaea) and Sagittaria trifolia, Lemnaceae weeds represented by Spirodela polyrhiza and Lemnapaucicos tata, Monocho Pontederiaceae weeds represented by ria korsakowii and Monochoria vaginalis, Elatinaceae weeds represented by Elatine triandra, Ammannia multiflora and Rotala indica Lythraceae weeds represented by ), etc., Oenotheraceae weeds represented by Lidwigia epilob ioides, Araliaceae weeds represented by Hydrocotyle sibt horpioides, Plantain ( (Plantaginaceae) weeds represented by Plantago asiatica, Equisetaceae weeds represented by Horsetail (Equisetum arvense), Cucurbitaceae weeds represented by Sicyos angulatus, Ophiopogon japonicus ), Apiaceae weeds typified by Oenanthe javanica, Urticaceae weeds typified by Boehmeria nivea var. nipononivea, and the like.

The weed-suppressing composition and weed-suppressing method of the present invention exhibit effects as shown by test examples, for example.

Test Example 1 (Evaluation of effectiveness against kudzu-producing areas)
Weeding was carried out at the site where waste was generated.
On the next day, "Conclude granule wettable powder" (containing 50% flupoxam) was diluted with tap water to obtain drug solution A. A drug solution B was obtained by diluting "Greenfield wettable powder" (containing 50% flurprimidol) with tap water. “Conclude granule wettable powder” (containing 50% flupoxam) and “Greenfield wettable powder” (containing 50% flurprimidol) were diluted with tap water to obtain drug solution C.

Chemical solution A was adjusted in concentration and sprayed on the kudid-producing area at 200 ml/m ² so that 2250 g of flupoxam per 1 hectare (Area A).
Chemical solution B was adjusted in concentration and sprayed on the kudzu-producing area at 200 ml/m ² so that 4,000 g of fluruprimidol per hectare (B1 area).
The concentration of chemical solution C was adjusted to 200 ml/m ² , and 2,250 g of flupoxam and 4,000 g of fluruprimidol per hectare were sprayed on the kudzu-producing area (C1 area).
Chemical solution B was adjusted in concentration and sprayed over the kudzu-producing area at a concentration of 200 ml/m ² so that 2000 g of flurprimidol per hectare (B2 area).
The chemical solution C was adjusted to a concentration of 200 ml/m ² and sprayed over the kudzu-producing area so that 2,250 g of flupoxam and 2,000 g of fluruprimidol per hectare (section C2).
200 ml/m ² of tap water was sprayed on the kudzu-producing area (untreated area).

The plant height of kudzu was measured on the day of spraying and on the day after 90 days from spraying. From the plant heights (average values) of plots A, B1, B2, C1, and C2 on the day 90 days after spraying, the plant control value was calculated for each. In addition, the grass suppression value is 0% when the plant height (average value) is the same as the plant height (average value) in the untreated area on the day 90 days after spraying, and the same as the plant height (average value) on the day of spraying. It was expressed as a relative value when the plant height (average value) was defined as 100%. Table 1 shows the results.

Using Colby's formula (S.R. Colby, Calculating synergistic and antagonistic responses of herbicide combinations, Weeds, 15, 20-22pp (1967)), the expected value of the herb-inhibitory value of chemical solution C was calculated as the weed-inhibitory value of chemical solution A. It was calculated from the value and the weed control value of the chemical solution B.
The expected value calculated by Colby's formula represents the additive effect of the chemical solution A and the chemical solution B.

E = X + Y - (X x Y/100)

X indicates the weed control value (%) when the amount a of flupoxam is applied alone, Y is the weed control value (%) when the amount b of flurprimidol is applied alone, and E is the amount of flupoxam in the amount a and the amount b of fluruprimidol. It is the expected value (%) of the weed control value in combination use. When the measured value of the herbicide value in the combined use of the amount a of flupoxam and the amount b of flurprimidol is greater than the expected value E, it means that the combined use of flupoxam and flurprimidol exhibits a synergistic effect. Table 1 shows the calculation results.

Test Example 2 (Efficacy evaluation for Oarrechinogiku growing area)
A drug solution D was obtained by dissolving "Conclude granule wettable powder" (containing 50% flupoxam) in tap water. A drug solution E was obtained by diluting “Greenfield wettable powder” (containing 50% flurprimidol) with tap water. “Conclude granule wettable powder” (containing 50% flupoxam) and “Greenfield wettable powder” (containing 50% flurprimidol) were dissolved and diluted with tap water to obtain drug solution F.

The concentration of chemical solution D was adjusted to 300 ml/m ² and the amount of flupoxam was 0.225 g/m ² , and the solution was sprayed on the site where Acrocephala japonicum infested (section D).
The chemical solution E was adjusted in concentration and sprayed on the site where Pleurotus aureus infested so that the amount of flurprimidol was adjusted to 300 ml/m ² and 0.2 g/m ² (section E1).
Chemical solution F was adjusted to a concentration of 300 ml/m ² and was sprayed on the site where Pleurotus aureus was infested so that the amount of flupoxam was 0.225 g/m ² and the amount of flurprimidol was 0.2 g/m ² (field F1).
The chemical solution E was adjusted in concentration and sprayed on the site where Pleurotus aureus was infested so that the concentration was adjusted to 300 ml/m ² and the amount of flurprimidol was 0.3 g/m ² (section E2).
Chemical solution F was adjusted to a concentration of 300 ml/m ² and was sprayed on the site where Pleurotus aureus was infested so that the amount of flupoxam was 0.225 g/m ² and the amount of flurprimidol was 0.3 g/m ² (section F2).
The chemical solution E was adjusted in concentration and sprayed on the site in which Pleurotus albicans was found in an amount of 300 ml/m ² and an amount of flurprimidol of 0.4 g/m ² (section E3).
The concentration of chemical solution F was adjusted to 300 ml/m ² , and the amount of flupoxam was 0.225 g/m ² and the amount of fluruprimidol was 0.4 g/m ² .
300 ml/m ² of tap water was sprayed on the site where A. japonicum was infested (untreated area).

On the day of spraying and on the day after 60 days from spraying, the height of the plant was measured. From the plant heights of plots D, E1, E2, E3, F1, F2, and F3 on the day 60 days after spraying, the plant control value was calculated for each. The plant suppression value was defined as 0% when the plant height was the same as the plant height in the untreated area on the day 60 days after spraying, and 100% when the plant height was the same as the plant height on the day of spraying. It was expressed as a relative value at time. The test was repeated 3 times, and the average plant height was used. Table 2 shows the results.

Using Colby's formula (S.R.Colby, Calculating synergistic and antagonistic responses of herbicide combinations, Weeds, 15, 20-22pp (1967)), the expected value of the weed control value of chemical solution F was calculated as the weed control value of chemical solution D. It was calculated from the value and the weed control value of the chemical solution E. Table 2 shows the calculation results.

Test Example 3 (Evaluation of effectiveness against the place where the green foxtail grows)
A liquid medicine G was obtained by dissolving "Conclude granule wettable powder" (containing 50% flupoxam) in tap water. A drug solution H was obtained by diluting "Greenfield wettable powder" (containing 50% flurprimidol) with tap water. “Conclude granule wettable powder” (containing 50% flupoxam) and “Greenfield wettable powder” (containing 50% flurprimidol) were diluted with tap water to obtain drug solution I.

The chemical solution G was adjusted to a concentration of 200 ml/m ² and the amount of flupoxam was 0.075 g/m ² , and sprayed on the site where the green foxtail was infested (G1).
The concentration of chemical solution H was adjusted to 200 ml/m ² and the amount of flurprimidol was 0.15 g/m ² , and the solution was sprayed on the site where the green foxtail was infested (H1 area).
The concentration of drug solution I was adjusted to 200 ml/m ² , and the amount of flupoxam was 0.075 g/m ² and the amount of fluruprimidol was 0.15 g/m ² (section I1).
The chemical solution G was adjusted to a concentration of 200 ml/m ² and the amount of flupoxam was 0.15 g/m ² , and sprayed on the site where the green foxtail was infested (section G2).
Chemical solution H was adjusted to a concentration of 200 ml/m ² and flurprimidol was sprayed in the area where the green foxtail was infested so that the amount of flurprimidol was 0.3 g/m ² (Section H2).
Chemical solution I was adjusted to a concentration of 200 ml/m ² and sprayed on the land where the foxtail was infested so that the amount of flupoxam was 0.15 g/m ² and the amount of flurprimidol was 0.3 g/m ² (section I2).
200 ml/m ² of tap water was sprayed on the site where the green foxtail was infested (untreated plot).

On the day of spraying and on the day 40 days after spraying, the volume of the aerial part of the green foxtail was evaluated. On the day 40 days after spraying, each grass inhibition value was calculated from the above-ground volume (average value) of G1, G2, H1, H2, I1 and I2 plots. In addition, the weed suppression value is 0% when the above ground volume (average value) is the same as the above ground volume (average value) in the untreated area on the day 40 days after spraying, and the above ground volume on the day of spraying It was expressed as a relative value when the volume (average value) and the above-ground portion volume (average value) were defined as 100%. Table 3 shows the results.

Using Colby's formula (S.R.Colby, Calculating synergistic and antagonistic responses of herbicide combinations, Weeds, 15, 20-22pp (1967)), the expected value of the herb-inhibitory value of chemical solution I was calculated as the weed-inhibitory value of chemical solution G. It was calculated from the value and the weed control value of the chemical solution H. Table 3 shows the calculation results.

Test Example 4 (Efficacy evaluation for arechiuri-producing areas)
A liquid medicine J was obtained by dissolving "Conclude Granule Wettable Powder" (containing 50% flupoxam) in tap water. A drug solution K was obtained by diluting "Greenfield Wettable Powder" (containing 50% flurprimidol) with tap water. “Conclude granule wettable powder” (containing 50% flupoxam) and “Greenfield wettable powder” (containing 50% flurprimidol) were dissolved and diluted with tap water to obtain drug solution L.

The concentration of chemical solution J was adjusted to 200 ml/m ² and the amount of flupoxam was 0.225 g/m ² , and the solution was sprayed on the ground where the cucumber was infested (section J).
Chemical solution K was adjusted to a concentration of 200 ml/m ² and flurprimidol was applied in an amount of 0.2 g/m ² to the area infested with arethiuri (K1 plot).
The chemical solution L was adjusted in concentration and sprayed on the area infested with arethiuri at a concentration of 200 ml/m ² with a flupoxam amount of 0.225 g/m ² and a fluruprimidol amount of 0.2 g/m ² (L1 plot).
The concentration of chemical solution K was adjusted to 200 ml/m ² and the amount of flurprimidol was 0.4 g/m ² , and the solution was sprayed over the area infested with arethiuri (K2 area).
The chemical solution L was adjusted in concentration and sprayed on the area infested with arethiuri so that the amount of flupoxam was 0.225 g/m ² and the amount of flurprimidol was 0.4 g/m ² at 200 ml/m ² (L2 plot).
200 ml/m ² of tap water was sprayed on the area infested with cucumber (non-treated area).
In both cases, the application was to the arechiuri at the stage where the vines had not grown.

Two months after spraying, the length of the vines of Arethiuri was measured (20 replicates). Two months after spraying, each grass inhibition value was calculated from the vine length (average value) in plots J, K1, K2, L1, and L2. In addition, the weed suppression value was defined as 0% when the length (average value) of the vine was the same as the length (average value) of the untreated plot two months after spraying, and the vine was not extended. It was expressed as a relative value when the same state as that of the stage without any was defined as 100%. Table 4 shows the results.

Using Colby's formula (S.R. Colby, Calculating synergistic and antagonistic responses of herbicide combinations, Weeds, 15, 20-22pp (1967)), the expected value of the herb-inhibitory value of chemical solution L was calculated as the weed-inhibitory value of chemical solution J. It was calculated from the value and the weed control value of the chemical solution K.
Table 4 shows the calculation results.

The results shown in Tables 1-4 show that the combined use of flupoxam and gibberellin biosynthesis inhibitors produces a synergistic effect.

Claims (4)

A weed control composition containing 1 part by mass of flupoxam and 0.2 to 5 parts by mass of fluruprimidol. The weed control composition according to claim 1, which is for kudzu. A weed control composition containing 1 part by mass of flupoxam and 0.2 to 5 parts by mass of flurprimidol at the same time or in different phases, or containing 1 part by mass of flupoxam and 0.2 to 5 parts by mass of flurprimidol is applied to a plant. method of controlling weeds , including applying to 4. The weed control method according to claim 3, wherein the plant is Kudzu.