JPH1045516A - Herbicide composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a herbicide composition exhibiting synergistic effect to control weeds at a low rate of application by mixing two specific kinds of known active herbicide components. SOLUTION: (A) carfentrazone is used in combination with (B) glyphosate. The component B includes various salts such as metal salts and amine salts. The amount of the component B is preferably about 0.1-1,000 pts.wt., especially 1-100 pts.wt. based on 1 pt.wt. of the component A. The application rate of the active component is about 0.1-1,000g/ha, preferably 10-100g/ha for the component A and about 10-10,000g/ha, preferably 100-1,000g/ha for the component B. The component A promotes the development of the herbicidal effect of the component B. The composition can be applied for the control of various weeds on non-crop land such as orchard, vacant land and forest and exhibits remarkable economic effect for the control of weeds. In the case of culturing various crops such as soybean, the composition is scattered before sowing to kill the existing grown weeds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a herbicide composition for efficiently controlling various harmful weeds by mixing two kinds of known herbicide active ingredients.

[0002]

2. Description of the Related Art A wide variety of chemicals have been put into practical use from the research and development of herbicides over many years, and these herbicides have contributed to labor saving in weed control work and improvement in productivity of agricultural and horticultural crops. Even today, there is a demand for the development of new chemicals having better herbicidal properties. In particular, as an agricultural and horticultural herbicide, it is possible to control only the target weed selectively and at a low dose without damaging the cultivated crop. It is desirable to be able to
Existing drugs do not always meet this need.

[0003] Carfentrazone (generic name) has an excellent herbicidal effect at a low dose on various broadleaf weeds in foliar treatment compared to conventional herbicides, but is sufficient for growing grass weeds. The effect may not be obtained. On the other hand, glyphosate (common name) has already been used in practical use in the form of various salts, and is characterized by having an excellent foliage treatment effect. However, a high dose is required in the foliage treatment.

[0004]

Means for Solving the Problems The present invention is a herbicide composition containing carfentrazone (A) and glyphosate (B) as active ingredients (hereinafter referred to as the composition of the present invention).

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION (B) includes various salts such as metal salts and amine salts. Examples of metal salts include sodium salts and potassium salts, and examples of amine salts include ammonium salts, isopropylamine salts, and trimesium salts. The composition of the present invention contains 0.1 to 1000 parts by weight of (B) per 1 part by weight of (A). Preferably, (B) is contained in an amount of 1 to 100 parts by weight per 1 part by weight of (A).

[0006] The amount of the treated drug of the composition of the present invention depends on the type of the specific target plant to be inhibited from growing. -100 g / ha, and (B) is 10
10,000 g / ha, preferably 100 to 1000 g / ha
ha. The composition of the present invention has not only a herbicidal effect of each of (A) and (B) contained in the composition of the present invention additively obtained, but also has a synergistic action, and The amount can be reduced.

At the same time, (A) has the effect of accelerating the onset of the herbicidal effect of (B). INDUSTRIAL APPLICABILITY The composition of the present invention can be applied to the control of various weeds in agricultural and horticultural fields such as orchards and non-cultivated lands such as playgrounds, vacant lots, forest lands, tank yards, track ends, and the like, and has a significant economic effect in controlling weeds.
When cultivating various crops such as soybean and corn without plowing, the composition of the present invention can control weeds that have already occurred by spraying before sowing.

[0008] The composition of the present invention is usually used in the form of a preparation mixed with a carrier comprising a solid or liquid diluent, but is preferably used in the form of a preparation further mixed with a surfactant. As the carrier, for example, solid carriers such as clay, talc, bentonite, diatomaceous earth, and white carbon, as well as water, alcohols (such as isopropanol, butanol, benzyl alcohol, and furfuryl alcohol), and aromatic hydrocarbons (such as toluene and xylene) , Chlorinated hydrocarbons (such as chlorobenzene), ethers (such as anisole), ketones (such as cyclohexanone, isophorone),
Liquid carriers such as esters (such as butyl acetate) and acid amides (such as N-methylpyrrolidone) are exemplified.

Examples of the surfactant include sodium alkylaryl sulfonate, sodium alkylnaphthalene sulfonate, sodium dialkyl succinate, polyoxyethylene alkyl aryl ether sulfate,
Anionic surfactants such as alkyl phosphates and alkylphenol phosphates, polyoxyethylene alkyl ethers, polyoxyethylene alkyl aryl ethers, polyoxyethylene (propylene) fatty acid esters, sorbitan monooleate and polyoxyethylene sorbitan monolaurate And plant derivatives such as polyoxyethylene hydrogenated castor oil.

The composition of the present invention may optionally contain an emulsifier, a wetting agent, a dispersing agent, a binder, a penetrant, a spreading agent, a stabilizer, a disintegrating agent, and the like, and then prepare emulsions, solutions, wettable powders, powders, granules It can be put to practical use in any dosage form such as a drug, granule, suspension or gel. At this time, a mixture with a plurality of known agricultural chemicals can be used at the same time. Next, a formulation example of a preparation when the compound of the present invention is used is shown. However, the composition examples of the present invention are not limited to these. In the following formulation examples, "parts" means parts by weight. [Wettable powder] (A) + (B) 5 to 80 parts Solid carrier 10 to 85 parts Surfactant 1 to 10 parts Others 0 to 5 parts Others include, for example, an anti-caking agent. [Emulsion] (A) + (B) 1-30 parts Liquid carrier 30-95 parts Surfactant 1-15 parts Others 0-10 parts Others include, for example, stabilizers. [Floable agent] (A) + (B) 5 to 70 parts Liquid carrier 15 to 65 parts Surfactant 0.1 to 12 parts Others 0.1 to 30 parts Others include, for example, an antifreezing agent and a thickener. Is raised. [Granular wettable powder (dry flowable)] (A) + (B) 20 to 90 parts Solid carrier 9 to 60 parts Surfactant 1 to 20 parts Others 0 to 40 parts Others include, for example, disintegrants and the like. .

[0011]

The composition of the present invention will be more specifically described below with reference to examples, but the compounds, production amounts, dosage forms, etc. in the present invention are not limited to the examples. In addition,
“Parts” all mean parts by weight. [Formulation Example 1] 2 parts of flowable compound (A) 30 parts of glyphosate 8 parts of agrisol S-711 8 parts (nonionic surfactant: trade name of Kao Corporation) Lunox 1000C 0.5 part (anionic surfactant: Toho Chemical Industry Co., Ltd. 1% Rhodopol water 20 parts (Thickener: Lone Poulin Co., Ltd.) Ethylene glycol 8 parts (Anti-freezing agent) Water 31.5 parts And

Formulation Example 2 Granular wettable powder compound (A) 3 parts Glyphosate 72 parts Isoban No. 1 10 parts (anionic surfactant: Kuraray Isoprene Chemical Co., Ltd.) Vanirex N 5 parts (anionic surfactant: Sanyo Kokusaku Pulp Co., Ltd.) Carplex # 80 10 parts Finely pulverized to a granular wettable powder.

Next, when (A) and (B) are mixed,
The test example which showed the effect exceeding the effect expected from the effect of a single agent is shown. The synergistic herbicidal effect of the herbicide mixture can be explained as follows. That is, the individual active compounds often exhibit disadvantages in their herbicidal activities, respectively, in which case the herbicidal activity of the combination of the two active compounds is simply the sum of the activities of each of the two compounds ( This is referred to as synergism when it is greater than the expected activity). The expected activity of a particular combination of two herbicides can be calculated as follows. (Colby SR, Calculation of synergistic and antagonistic responses of herbicide combinations, Weed, Vol. 15, 20-22 (1967)).
See

C = α + B− (α · β / 100) α: Inhibition rate when the herbicide A is treated at the amount of akg / ha β: Inhibition rate when the herbicide B is treated at the amount of bkg / ha C: Herbicide A akg / ha, Herbicide B bkg / ha
Inhibition rate expected when the treatment is performed with the amount of (i.e., if the actual inhibition rate is larger than the above calculation), it can be said that the activity by the combination shows a synergistic effect.

[Test Example 1] Test of herbicidal effect by growing treatment A sterilized upland field mixed with a chemical fertilizer and a compost was put into a plastic four-size bowl, and seedlings of nobies or oaks were sown. Grow in a greenhouse for 20 days, plant height 8-15c
The test was performed at the time of m. (A) is an appropriately prepared wettable powder, and (B) (generic name glyphosate) is diluted and mixed to a predetermined concentration using a commercially available water solvent. Further, 0.05% of Nippole is used as a spreading agent. Were mixed so that The spraying was performed using a spray gun at a spraying water amount of 5 liters / ha. Two weeks after spraying the chemical, the above-ground live weight of each weed was measured, and the inhibition rate (%) was determined by the following equation.

Inhibition rate (%) = (1−live weight of treated section / live weight of untreated section) × 100 Table 1 shows the herbicidal effects of the single agents (A) and (B). Table 2 shows the herbicidal effect when (A) and (B) were mixed. (In the table, E indicates an actual measurement value, C indicates an expected value, and the expected value indicates a value obtained from the Colby's formula.) The symbols in the table indicate the following.

N: Nobie, H: Hawk-meadow

[0018]

[Table 1] Table 1 Herbicidal effect of single agent (suppression rate%) Compound Treatment amount of active ingredient (g / ha) NH ＨA2.5 265 10 26 90 ───────────────────────────────── B 100 36 56 400 89 89 ───── ────────────────────────────

[0019]

[Table 2] Table 2 Herbicidal effect of mixture (suppression rate%) Treatment amount of each active ingredient NH (g / ha) (E) (C) (E) (C) ──────────────────────── {2.5 + 100 80 37 100 85 2.5 + 400 100 89 100 96 10 10 + 100 88 53 53 100 96 10 + 400 100 92 100 99} ──────────────────

As is clear from the above results, when (A) and (B) are mixed, they have not only the total herbicidal effect but also a synergistic effect when they are mixed. Weeds can be controlled.

Claims (1)

[Claims] 1. A herbicidal composition comprising carfentrazone and glyphosate as active ingredients.