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Weeding composition for rice direct-seeding field

A herbicidal composition and the technology of the composition, applied in the field of herbicidal compositions for direct-seeding rice fields, can solve problems such as the control effect of weed resistance in farmland, and achieve the effect of rapidly exerting drug effects, reducing adverse effects, and reducing the dosage

Inactive Publication Date: 2012-08-22
GUANGDONG ZHONGXUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of drug resistance to farmland weeds and the problem of poor control effect of single use in the prior art, and provide a pesticide with high efficiency, broad spectrum, environmental friendliness, and beneficial to the comprehensive management of weeds in rice field combination

Method used

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  • Weeding composition for rice direct-seeding field
  • Weeding composition for rice direct-seeding field
  • Weeding composition for rice direct-seeding field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0025] Preparation Example 2: 60% pretilachlor · pyrazosulfuron · clomazone water dispersible granules.

[0026] Pretilachlor 28%, Pyrazosulfuron-methyl 4%, Clomazone 28%, Sodium Lauryl Sulfate 4%,

[0027] Carboxylate 5%, urea 10%, add kaolin to 100%.

[0028] Put the above materials together into the conical mixer and mix evenly, and then pulverize through the jet mill, and then mix the pulverized materials through the conical mixer. Knead into a plastic material, and finally put the material into an extrusion granulator to extrude and granulate. After granulation, dry and sieve to obtain 60% pretilachlor·pyrazosulfuron·clomazone water dispersion granules.

[0029] Preparation Example 3: 38% pretilachlor · pyrazosulfuron · clomazone wettable powder.

[0030] Pretilachlor 10%, pyrazosulfuron-methyl 2%, clomazone 26%, sodium lauryl sulfate 2%,

[0031] Sodium butyl naphthalene sulfonate 3%, calcium lignosulfonate 5%, silica 5%, kaolin to 100%.

[0032] Put the above m...

Embodiment 4

[0033] Formulation Example 4 : 3% pretilachlor · pyrazosulfuron · clomazone granules.

[0034] Pretilachlor 1.0%, pyrazosulfuron 0.1%, clomazone 1.9%, sodium lauryl sulfate 4%, calcium lignosulfonate 5%, attapulgite 30%, add kaolin to 100%.

[0035] Put the above materials together into the conical mixer and mix evenly, and then pulverize through the jet mill, and then mix the pulverized materials through the conical mixer. powder. Put this wettable powder into a disc granulator, add water to granulate, and then dry in a drying cylinder, sieve, and cool in a cooling cylinder to obtain 3% pretilachlor-pyrazosulfuron-clomazone granules.

[0036] Biological Assay Example 1.

[0037] In order to verify the present invention, we carried out the toxicity test of pretilachlor, pyrazosulfuron-methyl, and clomazone on barnyardgrass and bermudagrass.

[0038] 1 Materials and methods.

[0039] 1.1 The test drugs: pretilachlor 94% original drug; pyrazosulfuron-etyl 97% original dr...

Embodiment 2

[0061] Biological Assay Example 2: Drug efficacy test for controlling annual weeds in direct-seeded rice field.

[0062] 1 Test conditions.

[0063] 1.1 Crops and cultivars: Rice (variety: Wanjinyou 133).

[0064] 1.2 Selection of test subject weeds.

[0065] The dominant weeds in the field mainly include: Barnyardgrass [Echinochloa crusgalli], Qianjinzi [Leptochloa chinensis], Alopecurus aequalis [Alopecurus aequalis], Cocklegrass [Monochoria vaginglis], Cyperus rotundus, etc.

[0066] 1.3 Cultivation conditions.

[0067] The test site is located in Yanwanghu Village, Yanwanghu Town, Hanshou County, Changde City, Hunan Province. Rice is planted all year round, and rice and rape are rotated. The rice for testing was sown on April 13, 2011, with a sowing rate of 2 kg / mu. The rice seeds were germinated until the breasts were broken and white, and 15 kg of compound fertilizer per mu was used as base fertilizer. The conditions of rice variety, sowing time, growth and fertili...

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Abstract

The invention relates to a weeding composition for a rice direct-seeding field. The weeding composition comprises active components such as pretilachlor, pyrazosulfuron-ethyl and clomazone. The weeding composition for the rice direct-seeding field has the advantages that after the pretilachlor, the pyrazosulfuron-ethyl and the clomazone are compounded, the weeding effect can be improved, the weed-controlling spectrum is broadened, the toxicity and the residue rate are low, and the usage amount, the usage time and the service cost are obviously reduced, the effect is obviously higher than that of a single weeding agent. The weeding composition is a novel composition agent for the prevention and treatment of annual weeds in rice direct-seeding fields.

Description

technical field [0001] The invention belongs to the technical field of pesticide weeding, and in particular relates to a rice direct-seeding field herbicidal composition with pretilachlor, pyrazosulfuron-methyl and clomazone as active ingredients. Background technique [0002] Pretilachlor, English common name: pretilachlor, chemical name: 2-chloro-2,6'-diethyl-N-(2-propoxyethyl) acetanilide. The selective seed germination pre-treatment agent of the genus C. can be absorbed through the hypocotyls, mesocotyls and coleoptiles of plants, and slightly absorbed by the roots. It directly interferes with the protein synthesis in weeds, and has an indirect effect on photosynthesis and respiration. The seedlings of the affected weeds are distorted, the primary leaves are difficult to stretch out, the leaves turn dark green, and the growth stops until they die. Rice has a strong ability to decompose pretilachlor, so it has a certain selectivity. [0003] Pyrazosulfuron-methyl, Engli...

Claims

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Application Information

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IPC IPC(8): A01N47/36A01N37/22A01N43/80A01P13/00
Inventor 陈佛祥冷忠国朱刚王礼文蒋全鹏张志伟
Owner GUANGDONG ZHONGXUN AGRI TECH
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