JP2009057310A - Herbicide composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an herbicide composition controlling annual and biennial wide leaf weeds and the perennate weeds of Cyperaceae growing in a lawn in a good efficiency and also in a little component amount, and further reducing the appearance risk of ineffective weeds or refractory weeds caused by the single use of a sulfonylurea-based herbicide. <P>SOLUTION: This herbicide composition comprises: the sulfonylurea-based herbicide; and one kind or two kinds selected from dichlobenil or chlorothiamid, as active ingredients. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for efficiently and completely controlling small amounts of ingredients by mixing active ingredients with annual and perennial broadleaf weeds, perennial cyperaceae weeds, etc. growing in turf.

  Diclobenil (2,6-dichlorobenzonitrile; DBN) or chlorothiamid (2,6-dichlorobenzothiamide) is used in orchards as well as in turf by spraying in the early stages of growth from the occurrence of weeds. It is an active ingredient of a herbicide and is an active ingredient having a herbicidal effect on annual weeds, annual broadleaf weeds and perennial cyperaceae weeds.

On the other hand, sulfonylurea herbicides are active ingredients that inhibit the activity of acetolactate synthase (ALS), which is part of the protein biosynthetic pathway, and are used not only in turf, but also in paddy fields, fields, and non-agricultural lands. Active herbicide ingredient.

The sulfonylurea herbicides are effective against a wide range of weeds with a small amount of components because the weed killing mechanism acts specifically on ALS, but in the Asteraceae weeds, Gramineae weeds and Cyperaceae weeds. The appearance of ineffective or resistant weeds has been observed. (For example, see Non-Patent Document 1)

“Ecology of agriculture and weeds, from invading plants to genetically modified crops” p171-p176, edited by Species Biology Association, Bunichi General Publishing Co., Ltd.

The present invention provides effective and small amount control of annual and perennial broadleaf weeds and perennial cyperaceae weeds growing in turf by mixing diclobenil or chlorothiamid and sulfonylurea herbicides. It is an object.

Furthermore, it aims at reducing the appearance risk of an ineffective weed or a resistant weed by single use of a sulfonylurea type herbicide by mixing a sulfonylurea type herbicide and an active ingredient with which action differs.

As a result of intensive studies from various viewpoints to solve the above-mentioned problems, the present inventors have grown in turf ground while having safety against Japanese turf by mixing diclobenil or chlorothiamid and sulfonylurea herbicides. Synergistic effects on annual and perennial broad-leaved weeds and perennial cyperaceae weeds, and strong herbicidal power against Asteraceae weeds, Syphaensis weeds, and Gramineae weeds with many sulfonylurea herbicide ineffective weeds In addition, it was found that mixing diclobenil or chlorothiamidide with a sulfonylurea herbicide is effective when the amount of diclovenyl or chlorothiamid alone is much smaller than that required for herbicidal diclobenyl or chlorothiamid alone. It came to be completed.

That is, the present invention is a herbicide composition comprising a sulfonylurea herbicide and one or two selected from diclobenil or chlorothiamid as herbicide active ingredients.

A herbicidal composition of diclobenil or chlorothiamid and a sulfonylurea herbicide can be sprayed in the turf to control grass weeds and broad-leaved weeds growing in the lawn of Japanese turf.

According to the present invention, sulfonylurea can be used without harm to Japanese turf by mixing one or two components selected from diclobenil or chlorothiamid with a sulfonylurea herbicide in an extremely small amount compared to the normal use amount. Synergistic effects were exhibited with respect to Asteraceae weeds, Aceraceae weeds, and Gramineae weeds that remained when weeds were used alone, and it was possible to control them efficiently.

Examples of the active ingredient of the herbicide of the present invention include a mixture of a sulfonylurea herbicide and one or two selected from cell wall biosynthesis inhibitors diclobenil or chlorothiamid.

Examples of the sulfonylurea herbicide include imazosulfuron, pyrazosulfuron, halosulfuron, bensulfuron methyl, cyclosulfamuron, ethoxysulfuron, rimsulfuron, metsulfuron methyl, frazasulfuron, and trifloxysulfuron sodium salt. Preference is given to imazosulfuron.

The herbicide used in the present invention can be sprayed by diluting in water such as wettable powder, granular wettable powder and flowable powder containing one or two diclobenyl or chlorothiamid and sulfonylurea herbicide. The formulation form.

As the content of the herbicidal active ingredient, the total of one or two selected from diclobenil or chlorothiamid is 1 to 50% and the sulfonylurea herbicide is 1 to 50% with respect to the final formulation weight. .

In addition, in order to obtain a stable herbicidal effect on grass weeds, triazifram, flupoxam, propyzamide, flufenacet, trifluralin, bethrosin, prodiamine, pendimethalin, alachlor, cinmesrin, cavenstrol, etc. are registered and effective The ingredients can be mixed simultaneously.

As a wettable powder, granulated wettable powder carrier, diatomaceous earth, dry clay, wet clay, talc, zeolite, quartzite, quartz sand, calcium carbonate, olivine sand, vermiculite, shirasu attapuljanite, wax stone, acid clay, activated clay, There are fly ash and the like, and these can be used alone or in combination of two or more.

As surfactants to be mixed with wettable powders, granulated wettable powders and flowable powders, specifically, in anionic systems, generally, alkyl sulfates, polyoxyethylene alkyl ether sulfates, sulfosuccinates, phosphate ester types Alkylbenzene sulfonate and naphthalene sulfonic acid formalin condensate can be used. In a nonionic system, a polyoxyethylene alkyl ether type, a polyoxyethylene fatty acid ester type, a polyoxyethylene sorbitan fatty acid ester type, and a polyoxyethylene polyoxypropylene alkyl ether type can be used.

The addition amount of the surfactant is 0.5 to 10% with respect to the wettable powder, the wettable granule powder and the flowable powder in anionic or nonionic single product or a combination of two or more.

When diclobenil is used, the component is easily sublimated and scattered. Therefore, 1 to 10% of ferric oxide is added as a sublimation inhibitor. When imazosulfuron is used, cyclodexton 1 to 1 is used as a decomposition inhibitor for the component. 10% may be added to increase the stability of these active ingredients and the persistence of the herbicidal effect.

[Production of wettable powder]
10% of white carbon (Shionogi Pharmaceutical Co., Ltd.) is added to 90% of the diclobenil (DBN) base and mixed well, and this mixture is mixed with an air compression grinder (Co-Jet System α mark III; Seishin Enterprise Co., Ltd.). ) To obtain a finely pulverized product having an average particle size of about 3 microns.
Similarly, 10% of white carbon (Shionogi Pharmaceutical Co., Ltd.) is added to 90% of imazosulfuron and mixed well, and this mixture is mixed with an air compression crusher (Co-Jet System α mark III; Seishin Enterprise Co., Ltd.). And finely pulverized product having an average particle size of about 3 microns.
Next, 39.5% diclobenil finely pulverized product, 39.5% imazosulfuron finely pulverized product, 3% active agent Solpol 5039 (POE alkyl allyl ether sulfate; Toho Chemical Co., Ltd.), Solpol 5050 (dialkyl ester sulfonate; Toho Chemical) Industrial Co., Ltd.) 1% and Katsumiyama clay 17% were added, put into a V-type blender and mixed at a rotational speed of 50 rpm for 60 minutes to obtain a wettable powder.

  A wettable powder was obtained by the same operation as the preparation of the wettable powder, except that the chlorothiamid bulk was used in place of the diclobenil bulk.

[Preparation of granule wettable powder]
Powdered diclobenil (DBN) base 36%, imazosulfuron base 36%, Katsumiyama clay 5%, diatomaceous earth 3%, citric acid 3% as a water-soluble inorganic substance, ferric oxide 1%, activator Solpol 5160 ( Alkyl sulfonate, phosphate compounded; Toho Chemical Industry Co., Ltd. 6%, Sun Extract P201H (Lignin sulfonic acid; Nippon Paper Chemicals Co., Ltd.) 1% charged Tabletop double arm kneader (PNV-5 type; Co., Ltd.) ) Irie Shokai) is rotated at about 50 rpm, and the powder is mixed thoroughly. After adding 9% tap water as the moisture content, knead well, and when it becomes moist dumpling, remove it from the kneader and dome gran DG-L1 type. Set up a 0.7mm diameter dome die screen on Fuji Powder Co., Ltd., extrude granulation, spread a wet granule on the vat and let it air dry for 60 minutes After that, the granulated granules were sized and dried with a circulation dryer at about 60 ° C. for 3 hours, and 1000 μm on a sieve shaker 300-MM2 type (Tsutsui Rikenki Co., Ltd.). And a 500-micron saucer were placed on top of each other and shaken to remove lumps, foreign matter, and powders of 1000 microns or more and 500 microns or less, and a granular wettable powder with a yield of 95% was obtained.

  Granule wettable powder was obtained by the same operation as the preparation of the above granule wettable powder, except that the chlorothiamid bulk was used instead of the diclobenil bulk.

[Production of flowable agent]
5% of propylene glycol is added to 39.08% of tap water, and Solpol 3742 (with POE alkyl allyl ether sulfate salt; Toho Chemical Industry Co., Ltd.) 3%, Proxel-GXL (Avicia Co., Ltd.) )) 0.02%, Antifoam Pronal-XE300 (Toho Chemical Co., Ltd.) 0.5% was added, then powdered imazosulfuron active substance 26%, diclobenil (DBN) active substance 26%, Furthermore, 0.2% of bee gum (Sansho Co., Ltd.) and 0.2% of xanthan gum (Dainippon Sumitomo Pharma Co., Ltd.), which are anti-settling agents, were added to HOMO-MIXER (Special Machine Industries, Ltd.) at 5000 rpm. The suspension dispersion, which was mixed and stirred for about 1 hour at a rotational speed of, was wet pulverized with a closed wet pulverizer (Dynomill; Shinmaru Enterprises Co., Ltd.) and water with an average particle size of 3 microns. To obtain a suspension concentrate of the suspended dispersion.

The flowable agent was obtained by the same operation as the above flowable agent, except that the chlorothiamid raw material was used in place of the diclobenil raw material.

[Comparative Example 1]
10% of white carbon (Shionogi Pharmaceutical Co., Ltd.) is added to 90% of the diclobenil (DBN) base and mixed well, and this mixture is mixed with an air compression grinder (Co-Jet System α mark III; Seishin Enterprise Co., Ltd.). ) To obtain a finely pulverized product having an average particle size of about 3 microns.
This diclobenil finely pulverized product is 55.5%, the active agent Solpol 5039 (POE alkyl allyl ether sulfate; Toho Chemical Industry Co., Ltd.) 3%, Solpol 5050 (dialkyl ester sulfonate; Toho Chemical Industry Co., Ltd.) 1%, Katsuyama 40.5% of clay was added, and the mixture was put into a V-type blender and mixed at a rotation speed of 50 rpm for 60 minutes to obtain a wettable powder.

[Comparative Example 2]
A wettable powder was obtained by the same operation as the preparation of the wettable powder, except that the chlorothiamid bulk was used instead of the diclobenil bulk.

[Comparative Example 3]
Add 10% white carbon (Shionogi Pharmaceutical Co., Ltd.) to 90% imazosulfuron and mix well, and dry the mixture with an air compression grinder (Co-Jet System α mark III; Seishin Enterprise Co., Ltd.). By pulverization, a finely pulverized product having an average particle diameter of about 3 microns was obtained.
This imazosulfuron finely pulverized product is 44.5%, the active agent Solpol 5039 (POE alkyl allyl ether sulfate; Toho Chemical Industry Co., Ltd.) 3%, Solpol 5050 (dialkyl ester sulfonate; Toho Chemical Industry Co., Ltd.) 1%, Katsuyama 51.5% of clay was added, and the mixture was put into a V-type blender and mixed at a rotation speed of 50 rpm for 60 minutes to obtain a wettable powder.

[Mixing effect of sulfonylurea herbicide, diclobenil and chlorothiamid in pot test and phytotoxicity test against damselfly (pre-weed pretreatment)]
A Kouraishiba was extracted from the Kouraishiba area in Tsukuba City, Ibaraki Prefecture, which is practiced and managed with a hole cutter. After cutting the above-ground part of Koba Shiba with scissors, it was transplanted to a plastic No. 5 pot and filled with river sand.
As the seeds of the test plants, sparrows and yellowtails were prepared, and 10 seeds of various kinds were sown at a predetermined location on the red mulberry and covered with an appropriate amount of river sand.
The chemical treatment is performed on the day the pot is prepared, and each product is diluted with water to a predetermined concentration using a commercial formulation of halosulfuron, cyclosulfamuron, ethoxysulfuron, and imazosulfuron, and a commercial formulation of chlorothiamid and diclobenil (DBN). Then, a spray liquid was prepared and sprayed using an electric hand sprayer (battery sprayer IR-3000; Iris Ohyama Co., Ltd.) so as to be uniform in the pot with a spray water amount of 200 ml / m2.
Growth management was carried out according to a conventional method. The investigation investigated the effectiveness of various active ingredients by observing the control effect against various weeds and the degree of phytotoxicity against damselfly 18 and 40 days after drug treatment.
The results are as shown in Table 1 (units used for each formulation component; AI). In addition, the maximum usage amount of each formulation component of halosulfuron, cyclosulfamuron, ethoxysulfuron, and imazosulfuron shown in Table 1 is a normal usage amount when each formulation component is used alone. When chlorothiamid and diclobenil (DBN) are each used alone, the usual amount used is 200 AI.
Although sulfonylurea herbicides alone cannot control sparrow leaf caterpillars and Tatiinu fuguri, mixing sulfonylurea herbicides with diclobenil and chlorothiamid exhibits a higher control effect on each of Vulgaris vulgaris and Tachiinufuguri, and exhibits a synergistic effect. It was found that it can be properly controlled.

The weeding effect on the weeds in the turf was performed according to the following observation criteria.
0: No herbicidal effect is observed as in the untreated area.
2: Shows a control effect of about 20% with respect to the untreated section.
4: About 40% of control effect is shown with respect to an untreated area.
6: Shows a control effect of about 60% with respect to the untreated area.
8: Shows a control effect of about 80% with respect to the untreated section.
10: Complete death

The investigation of the degree of phytotoxicity on Japanese turf was conducted according to the following observation criteria.
0: Same as untreated zone (no effect)
2: There are slight phytotoxic symptoms 4: Degree of phytotoxicity is observed, but it is judged that there is no problem in practical use 6: Degree of phytotoxicity is observed and it is judged that it is not practical 8: The symptom of phytotoxicity is enormous and cannot be used practically Degree of judgment 10: Degree of complete death due to phytotoxic symptoms

[Combination effect of sulfonylurea herbicide, diclobenil and chlorothiamid in pot test Phytotoxicity test against damselfly (1 leaf stage treatment)
A Kouraishiba was extracted from the Kouraishiba area in Tsukuba City, Ibaraki Prefecture, which is practiced and managed with a hole cutter. After cutting the above-ground part of Koba Shiba with scissors, it was transplanted to a plastic No. 5 pot and filled with river sand.
As the seeds of the test plants, sparrows and yellowtails were prepared, and 10 seeds of various kinds were sown at a predetermined location on the red mulberry and covered with an appropriate amount of river sand. Growth management was carried out according to a conventional method.
The chemical treatment is carried out after growth of sparrow leaf caterpillar to the 1st leaf stage, using each of halosulfuron, cyclosulfamuron, ethoxysulfuron, imazosulfuron commercial preparations and chlorothiamidone, diclobenil (DBN) commercial preparations, respectively, at predetermined concentrations. The solution was diluted with water to prepare a spray solution, and sprayed with an electric hand sprayer (battery sprayer IR-3000; Iris Ohyama Co., Ltd.) so as to be uniform in the pot with a spray water amount of 200 ml / m2.
The investigation investigated the effectiveness of various active ingredients by observing the control effect against various weeds and the degree of phytotoxicity against damselfly 17 and 47 days after drug treatment.
The results are as shown in Table 2 (units used for each formulation component; AI).
Although sulfonylurea herbicides alone cannot control sparrow leaf caterpillars and Tatiinu fuguri, mixing sulfonylurea herbicides with diclobenil and chlorothiamid exhibits a higher control effect on each of Vulgaris vulgaris and Tachiinufuguri, and exhibits a synergistic effect. It was found that it can be properly controlled.

[Herbicide effect by mixing sulfonylurea herbicides with diclobenil and chlorothiamid and phytotoxicity test against damselfly (Autumn)]
In September, Suzume Katabira, Tachiinufuguri, and Miminagusa were sown in the field of Korai Shiba in Sano City, Tochigi Prefecture, and the Examples 1, 2 and Comparative Examples 1, 2, 3 described above at the first leaf stage of Suzuno Katabira. The liquid prepared by diluting the wettable powder with water was uniformly sprayed in the test area using an electric hand sprayer (battery sprayer IR-3000; Iris Ohyama Co., Ltd.). In addition, the dandelion was observed and observed in nature.
In the survey, an interim survey was conducted 30 days after the drug treatment to observe the herbicidal effect on each weed and the degree of phytotoxicity against mulberry, and 120 days later, we investigated the herbicidal effect on various weeds. And the effectiveness against annual broadleaf weeds was investigated. In addition, the degree of phytotoxicity was not able to be observed in the damselfly after 120 days because it withered in winter.
The results are as shown in Table 3.
Although sulfonylurea herbicides cannot control sparrow leaf caterpillars, red beetles, and dandelions, the mixture of the sulfonylurea herbicides of the present invention and diclobenil and chlorothiamid can be mixed with 90 species of sparrow leaf catfish, red beetle, and dandelion. It was found that the control effect of about% or more was exhibited, a synergistic effect was exhibited, and it was possible to control accurately.

[Herbicide effect by mixing sulfonylurea herbicides with diclobenil and chlorothiamid and phytotoxicity test against damselfly (spring)]
In May, the field where Koraishiba, Himekugu, and Chimegusa, which conduct the conventional growth management in Shimotsuma City, Ibaraki Prefecture, was divided into 1m x 1m sections.
In addition, the giant octopus and dandelion were observed and observed in nature.
Liquids prepared by diluting the wettable powders of Examples 1 and 2 and Comparative Examples 1, 2 and 3 with water using an electric hand sprayer (battery sprayer IR-3000; Iris Oyama Co., Ltd.) It sprayed uniformly in the test area.
The investigation was conducted 30 and 60 days after the drug treatment, by observing the control effect on various weeds and the degree of phytotoxicity against the moss, and investigated the effectiveness of the mixed preparation of the present invention.
The results are as shown in Table 4.
Imazsulfuron, a sulfonylurea herbicide, can control Himekugu and Giant peony, but cannot completely control Chimegusa and Dandelion. On the other hand, by mixing sulfonylurea herbicide, which is the mixture of the present invention, with diclobenil and chlorothiamid, it shows a control effect of about 90% or more against Himekugu and Ooarechinogiku as well as Chimegusa and Dandelion, and exhibits a synergistic effect and accurately controls it. I found that I can do it.

It is necessary to control all the weeds that occur in the turf without causing any phytotoxicity and to produce synergistic effects on annual and perennial broadleaf weeds and perennial cyperaceae weeds. It is extremely effective in certain situations.

Claims (4)

  A herbicidal composition comprising a sulfonylurea herbicide and one or two selected from diclobenil or chlorothiamid as herbicide active ingredients. The herbicidal composition according to claim 1, wherein the sulfonylurea herbicide is one selected from imazosulfuron, halosulfuron, cyclosulfamlone, and ethoxysulfuron. The herbicidal composition according to claim 1 or 2, wherein the sulfonylurea herbicide is imazosulfuron. The herbicidal composition according to any one of claims 1 to 3, wherein the formulation form of the herbicidal composition is a dosage form selected from a wettable powder, a granular wettable powder and a flowable powder. Agent composition.