JP2000095611A - Herbicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a herbicidal composition having excellent herbicidal effect. SOLUTION: This composition comprises ethyl O-[5-(2-chloro-α,α,α-trifluoro-p- tolyloxy)-2-nitrobenzoyl]-DL-lactate and ethyl 2-chloro-3-[2-chloro-5-(1,3- dioxo-4,5,6,7-tetrahydroisoindolin-2-yl)phenyl]acrylate as active ingredients.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a herbicidal composition.

[0002]

2. Description of the Related Art
Although various herbicides have been used, there are many types of weeds to be controlled, and their emergence is long-term, so that the herbicidal effect is higher, the herbicidal effect appears earlier, and the herbicidal spectrum is wider. There is a need for a herbicide that does not cause harm to crops.

[0003]

The present inventors have conducted intensive studies to find an excellent herbicide and found that ethyl O- [5-
(2-chloro-α, α, α, -trifluoro-p-tolyloxy) -2-nitrobenzoyl] -DL-lactate (generic name: lactophen; hereinafter, referred to as lactofen) and ethyl 2-chloro-3- [2-chloro-5-
(1,3-dioxo-4,5,6,7-tetrahydroisoindoline-2-yl) phenyl] acrylate (generic name: sinidone-ethyl; hereinafter, referred to as sinidone-ethyl) as an active ingredient. Agent composition (hereinafter, referred to as
It is described as the composition of the present invention. ) Into weeds,
The present inventors have found that various kinds of weeds generated on agricultural land or non-agricultural land can be effectively weeded, and have reached the present invention. That is, the herbicidal effect of the composition of the present invention is synergistically increased as compared with the case where each active ingredient is used alone, so that the amount of the drug used can be reduced. In addition, the use of the composition of the present invention shortens the time required for the herbicidal effect to appear, and synergistically widens the herbicidal spectrum, as compared with the case where each active ingredient is used alone. In addition, the composition of the present invention can selectively remove a wide range of weeds without causing harmful harm to corn, soybean, wheat, and rice as target crops, and can be used particularly in soybean fields. Excellent in nature.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION
medicals Handbook, 1995 (Meist
er, Publishing Co. (Issue, 1995)
Compounds described on page C93. Sinidone-ethyl is a compound described in JP-A-62-185071.

[0005] The composition of the present invention has herbicidal activity against a wide range of weeds, is rich in selectivity to crops, and can be used in non-tillage cultivation and non-agricultural land in addition to ordinary tillage cultivation. Because it exhibits excellent herbicidal activity, it is excellent as a herbicide. The composition of the present invention has herbicidal activity against various weeds which are problematic in corn, soybean, wheat and rice fields. Polygonum weed: Polygonum con
volvulus), Polygonum (Polygonum)
lapathifolium), Polygonum pensylvanicu
m), Hartade (Polygonum persica)
ria), Rumex crisp
s), Rumex obtusifo (Rumex obtusifo)
lius) and knotweed (Polygonum csp)
idatum) Purslanaceae Weed: Purslane (Portulaca)
oleracea) Weeds: Stellaria med
ia) Chenopodium weed: Shiroza (Chenopodium al
bum), Butterfly (Kochia scopari)
a) Amaranthaceae weed: Amaranthus r
etroflexus)
lanthus hybridus Brassicaceae Weed: Wild Radish (Raphan)
us raphanistrum)
inapis arvensis, Capsicum (Caps)
ella bursa-pastoris Legume weed: American hornbrush (Sesbania)
exaltata), Ebisugusa (Cassia ob)
tusifolia), Florida Vega Weed (De)
smodium tortuosum, white clover (Trifolum repens) Malvaceae weed: Abutilon theop
hrusti), American deer (Sida sp.)
inosa) Violet weeds: Field panji (Viola ar)
vensis), Wild Panji- (Viola tr)
icor) Rubiaceae Weed: Gallium apari
ne) Convolvulaceae weed: American morning glory (Ipomoea)
hederacea), Malva Asagao (Ipomoe)
a purpura), Malva American morning glory (I
pomoea hederacea var integ
riuscula) and bean sagao (Ipomoea)
lacunosa), Convolvulus convolvulus (Convol)
vulus arvensis Lamiaceae Weeds: Lameur pur
puree), Photohenosa (Lamium ampl)
exicaule) Solanaceae weeds: Datura japonicus (Data)
a Stramonium), Dog Physalis (Sola)
num nigrum Scrophulariaceae Weed: Veronica
ca persica), scorpion (Veroni)
ca hederaefolia Asteraceae Weed: Xanthium pensy
lvanicum), wild sunflower (Helianth)
us annuus), dog chamomile (Matrica)
ria performata or inodora),
Common Gold (Chrysanthemum)
segetum), oro-shag (Matricari)
a matricarioides), Ragweed (Am)
brosia artemisiifolia, oobtaxa (Ambrosia trifidida), and swordweed (Erigeron canadensi)
s), mugwort (Artemisia print)
s), Solidago alga (Solidago al)
tissima) Purple weed: Forget-me-not (Myosotis a)
Ravensis (Coleoptera: Chrysomelidae): Asclepias
syriaca spurges weed: Euphorbi
a helioscopia), Onishikisou (Eu)
phorbia maculata Grass weed: Echinochloa cr
us-galli), Enokorogosa (Setaria)
viridis), Aquinoe nokorogosa (Setari)
a faberi), Meishishiba (Digitalias)
anguinalis), Hawkgrass (Eleusine)
indica), Poa annua (Poa annu)
a), Blackgrass (Alopecurus myo)
suloides), oats (Avena fat)
ua), Sorghum sorghum (Sorghum hale)
pense), barley (Agropyron rep)
ens), Umanohashiki (Bromus tecto)
rum), Cynodone dact (Cynodone dact)
ylon), cane millet (Panicum dich)
otomiflorum), Texas honeycomb (Pan)
icum texanum), Shata cane (Sor
ghum vulgare Cyperaceae Weed: Commelina co
mmunis) Rhododendron weeds: horsetail (Equisetum arve)
nse) Cyperaceae Weeds: Cygous cyperus (Cyperus)
iria), nectarine (Cyperus rotund)
us), yellowtail sedge (Cyperus esculen)
tus) On the other hand, the composition of the present invention does not cause harmful harm to crops such as corn, soybean, wheat, and rice, and the safety to soybean is particularly high.

When the composition of the present invention is used in a paddy field, it is preferable to spray the composition of the present invention on the foliage of the weed before flooding, or to sow the foliage of the weed before flooding after sowing rice. And spraying the composition of the present invention. The composition of the present invention
Monocotyledonous plants, such as Dioscorea japonica, American morning glory, Malva asagao, Malva americana morning glory, Maameasagao, Onami fir, Acer aegypti, etc .; It exhibits excellent herbicidal activity and does not cause harmful harm to rice as a crop.

In the composition of the present invention, the mixing ratio of lactofen as an active ingredient and sinidone-ethyl (hereinafter, referred to as the present active ingredient) depends on the kind of the target weed, the application scene,
Although it may vary depending on the application conditions and the like, it is usually 1 to 1 by weight.
It is in the range of 00: 1, preferably in the range of 2 to 10: 1.

The present active ingredient is usually mixed with a solid carrier, a liquid carrier and the like, and if necessary, a surfactant and other auxiliaries for the preparation are added thereto to prepare an emulsion, a wettable powder, a suspension, a granule and the like. It is used as a formulation. These preparations generally contain 0.5 to 90% by weight, preferably 1 to 80% by weight of the present active ingredient.

[0009] The solid carrier used in the preparation includes, for example, clays (kaolinite, diatomaceous earth, synthetic hydrous silicon oxide, fubasami clay, bentonite, acid clay, etc.), talc, and other inorganic minerals (sericite, quartz powder). , Sulfur powder, activated carbon, calcium carbonate, etc.) fine powders and granular materials such as chemical fertilizers (ammonium sulfate, ammonium phosphate, ammonium nitrate, salt ammonium chloride, urea, etc.). Examples of the liquid carrier include water, alcohols (methanol, Ethanol, etc.), ketones (acetone, methyl ethyl ketone, cyclohexanone, etc.), aromatic hydrocarbons (toluene, xylene, ethylbenzene, methylnaphthalene, etc.), non-aromatic hydrocarbons (hexane, cyclohexane, kerosene, etc.), esters ( Ethyl acetate, butyl acetate, etc.), nitriles (acetonitrile, isobutyronitrile) Etc.), ethers (dioxane, diisopropyl ether), acid amides (dimethylformamide, dimethylacetamide), halogenated hydrocarbons (dichloroethane, trichlorethylene, etc.) and the like.

Examples of the surfactant include alkyl sulfates, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and polyoxyethylenates thereof, polyethylene glycol ethers, polyhydric alcohol esters, sugars and the like. Alcohol derivatives and the like. Other pharmaceutical auxiliaries include, for example, casein, gelatin, polysaccharides (starch, gum arabic, cellulose derivatives, alginic acid, etc.), lignin derivatives, bentonite, synthetic water-soluble polymers (polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, etc.). ), A fixing agent or a dispersant, PAP (isopropyl oxyphosphate), BHT (2,6-tert-butyl-4-methylphenol), BHA (2- / 3-tert-butyl-).
4-methoxyphenol), vegetable oil, mineral oil, fatty acid,
Stabilizers such as fatty acid esters are included.

The composition of the present invention can also be prepared by formulating each of the active ingredients by the above-mentioned formulation technique and then mixing them. The composition of the present invention thus formulated is applied to a plant as it is or diluted with water or the like. The composition of the present invention can further be expected to enhance herbicidal efficacy when used in combination with other herbicides, and further, insecticides, fungicides, plant growth regulators, fertilizers, safeners, and soil improvement. It can also be used in combination with agents and the like.

The application rate of the composition of the present invention varies depending on the mixing ratio of the active ingredient compounds lactofen and sinidone-ethyl, weather conditions, preparation form, application time, application method, application place, weeds to be controlled, and target crops. However, the amount of the present active ingredient per hectare is usually 1 to 500 g, preferably 100 to 200 g. Emulsions, wettable powders, suspensions and the like are usually prepared in an amount of 100 to 100 per hectare.
Dilute with 0 liter of water and apply.

[0013]

[Examples] Formulation examples are shown below. In the following examples, parts represent parts by weight. Formulation Example 1 sinidone-ethyl 5 parts, lactofen 25 parts, calcium lignin sulfonate 3 parts, sodium lauryl sulfate 2
Parts and 65 parts of synthetic hydrous silicon oxide are crushed and mixed well to obtain a wettable powder. Formulation Example 2 0.4 parts of sinidone-ethyl, 40 parts of lactofen, 3 parts of calcium ligninsulfonate, 2 parts of sodium lauryl sulfate and 54.6 parts of synthetic hydrous silicon oxide are thoroughly pulverized and mixed to obtain a wettable powder. Formulation Example 3 1 part of sinidone-ethyl, 50 parts of lactofen, 3 parts of calcium ligninsulfonate, 2 parts of sodium lauryl sulfate
Parts and 44 parts of synthetic hydrous silicon oxide are crushed and mixed well to obtain a wettable powder. Formulation Example 4 0.5 part of sinidone-ethyl, 10 parts of lactofen, 3 parts of calcium ligninsulfonate, 2 parts of sodium lauryl sulfate and 84.5 parts of synthetic silicon hydroxide containing water are thoroughly pulverized and mixed to obtain a wettable powder.

Formulation Example 5 5 parts of sinidone-ethyl, 25 parts of lactofen, 3 parts of polyoxyethylene sorbitan monooleate, 3 parts of CMC (carboxymethyl cellulose) and 64 parts of water are mixed and wet-processed until the particle size becomes 5 microns or less. Pulverize to obtain a suspension. Formulation Example 6 sinidone-ethyl 0.4 part, lactofen 40 parts, polyoxyethylene sorbitan monooleate 3 parts, CMC
3 parts of (carboxymethylcellulose) and 53.6 parts of water are mixed and wet-pulverized until the particle size becomes 5 μm or less to obtain a suspending agent. Formulation Example 7 1 part of sinidone-ethyl, 50 parts of lactofen, 3 parts of polyoxyethylene sorbitan monooleate, 3 parts of CMC (carboxymethyl cellulose) and 43 parts of water are mixed and wet-ground until the particle size becomes 5 microns or less. Obtain a suspension. Formulation Example 8 0.5 part of sinidone-ethyl, 10 parts of lactofen, 3 parts of polyoxyethylene sorbitan monooleate, CMC
(Carboxymethylcellulose) 3 parts and water 83.5 parts are mixed and wet-pulverized until the particle size becomes 5 microns or less to obtain a suspending agent.

Hereinafter, test examples will be described. Evaluation criteria: The evaluation of the herbicidal efficacy was made as "0" when the growth state of the test weed at the time of the survey was no or little different from that of the untreated one, and the test plant was completely withered or completely grown. Is set to “10”, and 0
It is divided into 11 stages of 0 to 10, 0, 1, 2, 3, 4, 5,
Indicated by 6, 7, 8, 9, 10. The evaluation values "7", "8", "9", and "10" of the herbicidal effect indicate that the herbicidal effect is excellent, and the evaluation value "6" or less indicates that the herbicidal effect is practically insufficient. means. Evaluation of phytotoxicity "0",
“1”, “2”, and “3” mean that phytotoxicity does not cause a practical problem, and a rating of “4” or more means that phytotoxicity is unacceptable.

Test Example 1 A plastic pot having an area of 25.5 × 17.3 cm ² and a depth of 7 cm was filled with field soil, and soybeans, shiroza, barnyardgrass, and serrata were sown. After that, in the greenhouse, the puppies were grown for 20 days, soybeans and paniculata were grown for 25 days, and Shiroza were grown for 30 days. 10 parts of sinidone-ethyl, 14 parts of polyoxyethylene styryl phenyl ether, 6 parts of calcium dodecylbenzenesulfonate, 35 parts of xylene
Part and cyclohexanone 35 parts, a sinidone-ethyl emulsion, lactofen preparation (trade name: Cobra, manufacturer: Valent USA Co.)
rp. ) And a mixture of the sinidone-ethyl emulsion and the lactofen preparation were diluted with water, and the mixture was uniformly sprayed from above the plant with a small atomizer. After the treatment, the plants were raised in a greenhouse for 20 days, and the herbicidal efficacy was examined. Table 1 shows the results. The symbols in the table have the following meanings. D: soybean, I: dog millet, S: shiroza, T: sanaetade

[Table 1]

[0017]

EFFECT OF THE INVENTION By using the composition of the present invention, a wide range of weeds in a corn field, a soybean field, a wheat field, a rice field, a paddy field and the like can be selectively removed.

Claims (2)

[Claims] (1) ethyl O- [5- (2-chloro-α,
α, α, -trifluoro-p-tolyloxy) -2-nitrobenzoyl] -DL-lactate and ethyl 2-chloro-3- [2-chloro-5- (1,3-dioxo-
4,5,6,7-tetrahydroisoindoline-2-yl) phenyl] acrylate as an active ingredient. 2. A herbicidal method comprising applying foliage to a weed using the herbicidal composition according to claim 1.