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Weeding composition for cornfield

A herbicidal composition and a technology for corn fields, applied in the field of pesticides, can solve the problems of low solubility, low efficacy, diseases and the like of herbicides, and achieve the effects of good control effect, low residue and crop safety.

Inactive Publication Date: 2009-12-09
HEFEI XINGYU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the herbicides currently have the problem of low solubility of herbicides in low-cost solvents, and they show low efficacy and slight diseases under low temperature and drought conditions.

Method used

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  • Weeding composition for cornfield
  • Weeding composition for cornfield
  • Weeding composition for cornfield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1. Take nicosulfuron 2kg, bentazone 20kg, white carbon black 2kg, agricultural milk 700 # 10kg, methyl oleate 66kg. A conventional wet grinding and pulverizing process is used to prepare an oil suspension concentrate in which active ingredients nicosulfuron and bentazone account for 22%.

[0016] Efficacy report of 22% Nicosulfuron·Benzazone oil suspension concentrate: when used at the 23rd leaf stage of corn, the total control effect on weeds in 35 days is more than 95%. The test results are as follows:

[0017]

Embodiment 2

[0018] Example 2. Take 5kg of nicosulfuron, 46kg of bentazone, 3kg of sodium naphthalenesulfonate formaldehyde condensate, 3kg of sodium dialkylnaphthalenesulfonate, and 43kg of clay, and put each material into the reaction kettle at one time, and make it fully Mix, pulverize and pour to a certain fineness to obtain 51% nicosulfuron-benzazone wettable powder.

[0019] Efficacy report of 51% nicosulfuron-benzazone wettable powder: when used in the 2-3 leaf stage of corn, the total control effect on weeds in 35 days is more than 93%. The test results are as follows:

[0020]

[0021]

Embodiment 3

[0022] Example 3. Take nicosulfuron 5kg, bentazone 65kg, sodium lignosulfonate 2kg, pull open powder BX 0.2kg, OP-15: 1.5kg, cellulose 0.01kg, white carbon black 4kg, water 22.29kg, the above feed liquid After preparation, it is subjected to wet ultrafine pulverization, and then spray-dried and granulated to obtain the required 70% nicosulfuron-benzazone dry suspension concentrate.

[0023] Efficacy report of 70% nicosulfuron-benzazone dry suspension concentrate: when used in the 2-3 leaf stage of corn, the total control effect on weeds in 35 days is more than 95%. The test results are as follows:

[0024]

[0025] From the above example, it can be seen that the different preparations made of nicosulfuron and bentazone according to different proportions have good control effects on weeds in the corn field, which is obviously better than the two single-dose single-use. The above examples also show that the nicosulfuron and bentazone herbicidal composition not only has a bro...

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Abstract

The invention discloses a weeding composition for a cornfield. The weeding composition is prepared by combining nicosulfuron as an active ingredient and bentazon; and the weight ratio of the nicosulfuron to the bentazon is 1:30-40:1. The composition can be made into missible oil, oil deflocculant, wettable powder, dry deflocculant and the like according to a well-known method. The weeding composition has the characteristics of high-efficient weeding effect, wide weed spectrum, little use amount, low residue, safety to crop, cold and drought resistance, low cost and good prevention and control effect on broadleaf weed and grassy weed.

Description

Technical field: [0001] The invention relates to a herbicidal composition used in cornfields and belongs to the technical field of pesticides. technical background: [0002] Corn is one of the main crops in our country. With the continuous expansion of its planting area, dryland weeds are also increasing in the continuous expansion of production. In recent years, chemical weeding in corn fields has become an important technical link to ensure the safe production of corn. However, due to improper selection of drugs or inadequate use of technology, unsatisfactory control effects or phytotoxicity have occurred frequently. Therefore, drug farmers need to choose a herbicide with high activity, wide herbicidal range and high safety to crops. Chemical herbicides are now also an affordable and reliable means of weed control in farmland. However, most of the herbicides currently have the problem of low solubility in low-cost solvents, low efficacy and mild disease under low tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/36A01N43/88A01P13/00
Inventor 赵邦斌何普泉丁云好姚海波王龙
Owner HEFEI XINGYU CHEM
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