JP2943003B2 - Field-acting herbicide composition and herbicidal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a compound represented by the general formula (I) (Wherein, R represents a lower alkyl group, and X represents a halogen atom). One or two selected from a 3-substituted phenylpyrazole derivative represented by the following formula and a phenylurea herbicide or a phenoxy fatty acid herbicide. Field of the Invention The present invention relates to a field-acting herbicide composition and a method for controlling herbicides, which comprise at least one compound as an active ingredient.

Currently, in the cultivation of crops such as wheat, barley, soybeans, corn and the like in upland cultivation, various herbicides are used for the purpose of controlling weeds.In upland cultivation, there are many types of weeds to be controlled. Since the outbreak occurs over a long period of time, herbicides to be used also have a broad herbicidal spectrum, and there is a need for a herbicide that is safe for crops and that exhibits a high herbicidal effect at a low dose.

In view of the above situation, the present inventors have conducted intensive studies to create a herbicide that has a wide herbicidal spectrum, prevents the occurrence of weeds for a long period of time, and is safe and has a low herbicidal effect on crops. As a result of the superposition, 1 selected from the 3-substituted phenylpyrazole derivative represented by the above general formula (I) and a phenylurea herbicide or a phenoxy fatty acid herbicide.
By combining a species or two or more compounds,
Compared to the case where each compound is used alone, it shows an unexpectedly synergistic effect, thereby reducing the dose and finding that the herbicidal spectrum is expanded,
The present invention has been completed.

One of the active ingredients of the present invention, a 3-substituted phenylpyrazole derivative represented by the general formula (I), was filed by the present applicant as a herbicide in Japanese Patent Application Nos. 63-217164 and 1-2225724. Table 1 shows typical compounds.

General formula (I) Examples of the phenylurea herbicide which is one of the other active ingredients that can be used in the present invention include f.3- (4-isopropylphenyl) -1,1-dimethylurea (generic name: isoproturon, The PESTICIDE INDEX, 7t).
h.edition, P329) g.3- (3,4-dichlorophenyl) -1,1-dimethylurea (generic names diuron, P226) h.3- (3,4-dichlorophenyl) -1-methoxy-1-
Dimethylurea (generic name Linuron, P336) i.3- (4-Chlorophenyl) -1,1-dimethylurea (generic name Monuron, P386). Examples of phenoxy fatty acid herbicides include 4-chloro-2-methylphenoxyacetic acid, salts or esters thereof, for example, j.4-chloro-o-tolyloxyacetic acid, sodium or potassium salt thereof (generic name: MCP) k.4- Ethyl chloro-o-tolyloxyacetate (generic name: MCP
-Ethyl) l.4-Butyl-o-tolylbutyl oxyacetate (generic name MCP
-Butyl) 4-chloro-2-methylphenoxypropionic acid, a salt or ester thereof, for example, m.4-chloro-o-tolyloxypropionic acid, a potassium salt or a diethanolamine salt (common name MCPP) n.4-chloro Examples thereof include phenylurea-based compounds and phenoxy fatty acid-based compounds such as -o-tolyloxyacetic acid or its sodium salt (generic name: MCPB), but the present invention is not limited to the above compounds, and one of the present invention The same effect can be obtained by mixing and using the 3-substituted phenylpyrazole derivative which is the active ingredient of the above.

The herbicidal composition of the present invention comprises various weeds in upland crops,
In particular, the present invention is a herbicide composition exhibiting an excellent herbicidal effect at a low dose and a wide range of weeds in a cereal field such as wheat and barley at a low dose and exhibiting no harm to crops.

The herbicidal composition of the present invention comprises various weeds in upland crops,
In particular, weeds in cereal fields such as wheat and barley, such as yamgra, chickweed, giant petrel, violets, dog chamomile, gumbinazuna, oroshaku, haragarashi, himeodorikosou, suzukusyuthisami, forget-me-nots, haradade, sasa-e-o-a, sasa-e-o-a-na-g-a, sasa-e-o-a-na-g, In addition to its excellent herbicidal effect on dicotyledonous plants such as dogwood, etc., it also has a herbicidal effect on grass weeds such as P. brassicae and P. perennial.

The herbicidal composition of the present invention can simultaneously control, in particular, weeds that have been difficult to control in the past, such as yamgra, chickweed, giant petrel, violet, dog chamomile, gumbinazuna, halade, sanaetade, buckwheat.

When the herbicidal composition of the present invention is used, it may be manufactured and used in an appropriate dosage form according to the purpose according to a conventional method for pesticide formulation. For example, a solid carrier, a liquid carrier, a surfactant, and other necessary components may be used. May be mixed with adjuvants and the like to prepare granules, wettable powders, powders, flowables, liquids and the like and use them.

The active ingredient of the herbicidal composition of the present invention can be blended in an arbitrary ratio according to the dosage form, and the blending ratio of the active ingredient in the composition is based on the 3-substituted compound represented by the general formula (I). The phenylpyrazole derivative and the phenylurea-based herbicide compound or the phenoxy fatty acid-based herbicide compound may be mixed at an arbitrary ratio, and is usually used with respect to 1 part by weight of the 3-substituted phenylpyrazole derivative represented by the general formula (I). The phenylurea compound may be selected from the range of 1 to 5000 parts by weight, preferably 5 to 1000 parts by weight, and the phenoxy fatty acid compound may be selected from the range of 1 to 1000 parts by weight, preferably 1 to 1000 parts by weight. It is in the range of 500 parts by weight.

When the herbicidal composition of the present invention is used, for example, in a wheat field, it can be used from the early stage of the development of wheat and weeds to the growing season.

In addition, the present invention is not limited to these periods, and it is also possible to treat the soil before the emergence of wheat and weeds.

The treatment amount of the herbicidal composition of the present invention is 0.1 to 6000 g per hectare as the effective amount of the herbicidal composition of the present invention.
It can be used by selecting from the range.

Hereinafter, typical examples of the present invention will be described, but the present invention is not limited thereto.

 In Examples, “parts” means “parts by weight”.

Example 1. Compound 1 0.5 part Compound f 2.0 part Hydrous silicic acid fine powder 1.0 part Polyvinyl alcohol 0.5 part Silica sand 96.0 parts The above components are uniformly mixed and pulverized, kneaded with an appropriate amount of water, granulated and dried to obtain granules. Agent.

Example 2. Compound 4 1.0 part Compound j 8.0 parts Hydrous silicic acid fine powder 2.0 parts Polyvinyl alcohol 0.5 parts Silica sand 88.5 parts The above components are uniformly mixed and pulverized, kneaded by adding an appropriate amount of water, granulated and dried to obtain granules. Agent.

Example 3 Compound 4 20.0 parts Compound f 40.0 parts Sodium lauryl sulfate 3.0 parts Lignin sulfonate calcium 3.0 parts Hydrous silicate fine powder 7.0 parts Clay powder 27.0 parts The above are uniformly mixed and pulverized to obtain a wettable powder.

Example 4. Compound 4 10.0 parts Compound j 20.0 parts Sodium lauryl sulfate 3.0 parts Lignin calcium sulfonate 3.0 parts Hydrous silicate fine powder 5.0 parts Clay powder 59.0 parts The above are uniformly mixed and pulverized to obtain a wettable powder.

Example 5. Compound 1 5.0 parts Compound f 15.0 parts Polyoxyethylene nonyl phenyl ether 1.5 parts Polyoxyethylene styrenated phenyl ether 1.5 parts Xanthan gum 0.2 parts Ethylene glycol 5.0 parts Water 71.8 parts The above are uniformly mixed and wet-pulverized. A flowable agent.

Test Example 1. Synergistic Effect of the Composition of the Present Invention A pot having a diameter of 12 cm and a height of 11 cm was filled with field soil, and seeds of Ooinofugu were sown at a covering soil depth of 0.5 cm and grown in a greenhouse.

When Ooinoufu-guri reaches the 3 leaf stage and the height of the plant is 8 cm, a predetermined amount of the herbicidal composition of the present invention is diluted with water, and at a rate of 500 per hectare, the entire foliage is uniformly spread from above the plant with a small sprayer. Sprayed. On the 21st day after the spraying, the above-ground living weight of the withering ogre was measured, and the living weight inhibition rate (%) was calculated by the following equation.

Tables 3 to 7 show the test results.

The above results are shown graphically for better understanding.

FIG. 1 is a diagram plotted by an iso-effect method based on the herbicidal effect on the giant beetle in Table 1 in the test examples. The horizontal axis represents the amount of the active ingredient of compound 1 (g / ha), and the vertical axis represents the amount of the active ingredient of compound a (g / ha). The additive effect of 90% above-ground living weight suppression rate is indicated by a dashed line, and the actual iso-effect line of 90% above-ground living weight suppression rate is indicated by a solid line.

 FIG. 2 is shown in the same manner as FIG.

As shown in FIGS. 1 and 2, the herbicidal composition of the present invention clearly shows a synergistic effect.

[Brief description of the drawings]

FIG. 1 and FIG. 2 are graphs showing the synergistic effect of the herbicidal composition of the present invention by the isometric method.

Claims (6)

(57) [Claims] 1. The compound of the general formula (I) (Wherein, R represents a lower alkyl group, and X represents a halogen atom). One or two selected from a 3-substituted phenylpyrazole derivative represented by the following formula and a phenylurea herbicide or a phenoxy fatty acid herbicide. A field-acting herbicide composition comprising at least one compound as an active ingredient. 2. A phenylurea herbicide or a phenoxy fatty acid herbicide in a proportion of 1 to 5000 parts by weight per 1 part by weight of a 3-substituted phenylpyrazole derivative represented by the general formula (I). The herbicidal composition for field action according to claim 1, characterized in that: 3. The herbicidal composition for field action according to claim 2, which is for wheat. 4. Formula (I) for controlling undesired weeds against the growth of upland crops. (Wherein, R represents a lower alkyl group, and X represents a halogen atom). One or two selected from a 3-substituted phenylpyrazole derivative represented by the following formula and a phenylurea herbicide or a phenoxy fatty acid herbicide. A method for controlling weeds in upland crops, comprising treating a field-acting herbicide composition containing at least one kind of compound as an active ingredient in an amount of 0.1 to 6000 g as an active ingredient per hectare. 5. The method for controlling weeds according to claim 4, wherein the upland crop is wheat. 6. The method for controlling weeds according to claim 5, wherein the treatment is carried out from the beginning to the growing stage of upland crops and weeds.