Weeding composition for preventing and removing annual weed in rice paddy fields

A herbicidal composition, a technology for paddy fields, applied in the directions of chemicals, biocides, herbicides and algaecides for biological control, can solve problems such as the effect of drug resistance and control of weeds in farmland, and reduce the use of pesticides Quantity, reduce costs, and improve the effect of prevention and control

Inactive Publication Date: 2014-04-02
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 in the prior art and the problem of poor control effect of singl

Method used

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  • Weeding composition for preventing and removing annual weed in rice paddy fields
  • Weeding composition for preventing and removing annual weed in rice paddy fields
  • Weeding composition for preventing and removing annual weed in rice paddy fields

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0018] Formulation Example 2: Preparation method of 60% pretilachlor-bensulfuron-methyl-oxaziclozone water-dispersible granule.

[0019]

[0020] 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-bensulfuron-methyl-oxazicone water dispersion granules.

[0021] Formulation Example 3: Preparation method of 50% pretilachlor-bensulfuron-methyl-oxaziclozone wettable powder.

[0022]

[0023] 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. Pretilachlor · Bensulfuron-methyl · Oxaziculone wettable powder.

[0024] Formulation example 4: 3% pretilachlo...

Embodiment 1

[0027] Bioassay Example 1: Indoor bioassay test.

[0028] In order to verify the present invention, we carried out the toxicity test of pretilachlor, bensulfuron-methyl and oxazicone compound on barnyardgrass and bermudagrass.

[0029] 1 Materials and methods.

[0030] 1.1 Drugs to be tested:

[0031] Pretilachlor 95% original drug;

[0032] Bensulfuron-methyl (bensulfuron-methyl) 96% original drug;

[0033] Oxaziclomefone 96.5% original drug.

[0034] 1.2 Test materials:

[0035] Barnyardgrass【Echinochloa crusgalli(L.)Beauv.】

[0036] Duckweed 【Monochoria vaginglis (Burm.f.) Preslex Kunth】

[0037] The above weed seeds were collected from the live rice fields of Laokeng Village, Renshan Town, Huidong County, Huizhou City, Guangdong Province, and were stored indoors for future use.

[0038] 1.3 Test method:

[0039] 1.3.1 Experimental treatment design:

[0040] (6) Bensulfuron-methyl 0.5g (a.i.) / hm 2

[0041] (7) Bensulfuron-methyl 1g (a.i.) / hm 2

[0042] (8) Bens...

Embodiment 2

[0078] Biological Assay Example 2: Field Drug Efficacy Test.

[0079] 1 Test conditions:

[0080] 1.1 Crops and cultivars: rice (variety: Wanjinyou 133).

[0081] 1.2 Selection of test subject weeds:

[0082] The dominant weeds in the field mainly include: Barnyardgrass [Echinochloa crusgalli], Qianjinzi [Leptochloa chinensis], Coppergrass [Monochoria vaginglis], sedge [HerbofNutgrassGalingale], etc.

[0083] 1.3 Cultivation conditions:

[0084] 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 11, 2013, 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 fertilizer and water management in each plot are the same, and small ridges are built be...

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PUM

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Abstract

The invention relates to a weeding composition for preventing and removing annual weed in rice paddy fields, of which the effective components are pretilachlor, bensulfuron methyl and oxaziclomefone. The weeding composition comprises the following components in percentage by weight: 1-50% of pretilachlor, 1-10% of bensulfuron methyl, 1-30% of oxaziclomefone and the balance of pesticide adjuvant. The composition is suitable for preventing and removing annual weed in rice paddy fields, has obviously better preventing and removing effects than a single agent, and has the advantages of wide weeding spectrum, higher actual effect, lower drug resistance for weed, time saving, labor saving and the like.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and relates to a herbicidal composition whose active ingredients are pretilachlor, bensulfuron-methyl and oxazicone, which is used for controlling annual weeds in paddy fields. Background technique [0002] Pretilachlor is a selective seed germination pretreatment agent, which can be absorbed by plant hypocotyls, mesocotyls and coleoptiles, and slightly absorbed by roots, directly interferes with protein synthesis in weeds, and has indirect effects 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] Bensulfuron-methyl is a selective systemic herbicide, the active ingredient can diffuse rapidly in water, absorbed by the roots and leaves of weeds and tra...

Claims

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Application Information

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IPC IPC(8): A01N47/36A01P13/00A01N37/22A01N43/86
Inventor 陈佛祥吴泽伟
Owner GUANGDONG ZHONGXUN AGRI TECH
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