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Pesticide composition used for control controlling cucumber powdery mildew

A pesticide composition, cucumber powdery mildew technology, applied in the direction of chemicals, applications, biocides, etc. for biological control, can solve the problems of metabolism interference, affecting photosynthesis, yield loss, etc., to reduce the dosage, reduce the The effect of low drug cost and use cost

Inactive Publication Date: 2016-03-30
GUANGDONG ZHONGXUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mildew spots are scattered separately in the early stage, and then combined to form a large mildew spot, which can even cover the whole leaf, seriously affecting photosynthesis, disturbing normal metabolism, causing premature aging, and loss of yield
In recent years, powdery mildew has developed some drug resistance, and it can occur all year round, which brings certain difficulties to the prevention and treatment.

Method used

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  • Pesticide composition used for control controlling cucumber powdery mildew

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Indoor virulence determination of the combination of benzovinfluconazole with pyrithrimol and pyrithrimol sulfonate against the pathogenic fungus of cucumber powdery mildew, Pleurotus spirochete.

[0023] According to the logarithm value of the drug concentration (mg / L) as the independent variable x, and the probability value of the corrected mortality rate as the dependent variable y, respectively establish toxicity regression equations, and use DPS software to calculate the EC of single dose and each proportioned mixture 50 and its mixture co-toxicity coefficient. According to Sun Yunpei's method, co-toxicity coefficient (CTC) ≥ 120 represents synergistic effect; co-toxicity coefficient (CTC) ≤ 80 represents antagonism; 80 50 / Test agent EC 50 )×100. Theoretical toxicity index (TTI) = (toxicity index of A × percentage of A in the mixture) + (toxicity index of B × percentage of B in the mixture). Co-toxicity coefficient (CTC) = [measured toxicity index (AT...

Embodiment 2

[0028] Example 2: 20% benzovinfluconazole · pyrimethrimol suspension concentrate.

[0029] The following substances are all in weight ratio: 10% benzovinfluconazole, 10% pyrimethrimol, 2% lignosulfonate, 2% polycarboxylate, 3% alkylphenol polyoxyethylene ether, 2% bentonite , aluminum magnesium silicate 2%, methanol 2%, propylene glycol 3%, deionized water to make up to 100%. The above materials are weighed in proportion, stirred and mixed, ground by a ball mill, and sheared by a high-speed shearing machine to obtain a 20% benzovinfluconazole·pyrimazole suspension concentrate.

[0030] Use 20% benzofenazole · pyrimethrimol suspension to control cucumber powdery mildew, and the control effect after 5 days, 10 days, and 20 days: the dosage of 20% benzophenazole · pyrithrimol suspension is 60ga.i. / ha mixed water spray control effect 87.75%, 95.77%, 86.24%; 20% benzovinfluconazole suspending agent dosage 60ga.i. / ha mixed water spray control effect 81.25%, 87.07%, 76.40%; 10% B ...

Embodiment 3

[0031] Example 3: 25% wettable powder of benzovinflufenazole·pyrimolsulfonate.

[0032] The following substances are all in weight ratio: 5% benzovinfluconazole, 20% pyridylsulfonate, 4% sodium dodecylbenzenesulfonate, 2% sodium butylnaphthalenesulfonate, sodium alkylsulfonate 2%, lignosulfonate 2%, magnesium chloride 2%, bentonite 3%, silica 3%, acrylic acid homopolymer sodium salt 5%, kaolin make up 100%. The above materials are weighed in proportion, stirred and mixed, mechanically pulverized and then jet-pulverized to obtain 25% benzovinflupyrazole·pyrimolsulfonate wettable powder.

[0033]Control cucumber powdery mildew with 25% benzofenazol·pyrimolsulfonate wettable powder, the effect of 5d, 10d, 20d after application: Wet powder dosage 60ga.i. / ha mixed with water spray control effect 85.17%, 94.92%, 85.34%; 5% benzovinfluconazole wettable powder dosage 60ga.i. / ha mixed water spray control effect 78.07%, 86.17% %, 72.44%; 20% pyrithrimol sulfonate wettable powder dosag...

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Abstract

A disclosed pesticide composition used for control controlling cucumber powdery mildew is composed of an effective ingredient a, an effective ingredient b and an auxiliary agent. The effective ingredient a is benzovindiflupyr, the effective ingredient b is one selected from ethirimol and bupirimate, and the weight ratio of the effective ingredient a to the effective ingredient b is 1:40-40:1, and the weight sum of the effective ingredient a and the effective ingredient b is 5%-80% of the composition. The pesticide composition possesses obvious synergic effect on cucumber powdery mildew, and is obviously improved in cucumber powdery mildew controlling effect after being applied to field.

Description

technical field [0001] The invention belongs to the technical field of pesticide combination application, and in particular relates to a pesticide composition for preventing and treating cucumber powdery mildew. Background technique [0002] Cucumber powdery mildew, commonly known as "white hair disease", is one of the common diseases in cucumber cultivation. The leaves suffer the most, followed by petioles and stems, and generally do not harm fruits. In the early stage of the disease, small white nearly round powder spots appear on the front or back of the leaves, and gradually expand into large white powder areas with inconspicuous edges, covering the leaf surface, as if sprinkled with a layer of white powder. Wipe off the white powder, it can be seen that the leaves are chlorotic, withered and yellow and brittle. When the disease is severe, the leaves are covered with white powder and become off-white until the whole leaf dies. After powdery mildew infects petioles and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/56A01N43/54A01P3/00
CPCA01N43/56A01N43/54
Inventor 陈佛祥张志伟王礼文朱刚吴泽伟颜石雷
Owner GUANGDONG ZHONGXUN AGRI TECH
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