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Biopesticide for preventing and treating downy mildew

A bio-pesticide and downy mildew technology, applied in biocides, chemicals for biological control, biocides, etc., can solve problems such as affecting the field operation of orchards, affecting the growth of fruit trees and saplings, and requiring large amounts of fertilizer and water. , to achieve the effect of reducing bacterial resistance, difficult drug resistance, and reducing pesticide environmental pollution

Active Publication Date: 2020-07-28
ZAOZHUANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Our previous research found that intercropping wheat has a good control effect on grape downy mildew, but the fruit trees need more fertilizer and water. Intercropping wheat will not only affect the growth of fruit tree saplings, but also affect the field operation of the orchard

Method used

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  • Biopesticide for preventing and treating downy mildew
  • Biopesticide for preventing and treating downy mildew
  • Biopesticide for preventing and treating downy mildew

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] indoor bioassay

[0019] test target

[0020] Grape downy mildew (Plasmopara viticola), strains collected from the field.

[0021] Test material preparation

[0022] Select the susceptible grape variety Gembo, from top to bottom 4 to 6 leaf positions, cut the leaves with 1cm to 2cm petiole in the same part, the same growth, wrap the petiole with wet cotton balls and place it in a petri dish, keep it moist for later use .

[0023] Test drug

[0024] 98% eugenol, product of Jiangsu Jintan Weidelong Chemical Co., Ltd.; 31% ethanol dry crude extract of wheat straw and eugenol compound fungicide, prepared by Zaozhuang College.

[0025] Control drug

[0026] 98% dimethomorph technical product, product of Shenyang Fengshou Pesticide Co., Ltd., Liaoning Province.

[0027] experiment procedure

[0028] S1. Preparation of sporangia suspension

[0029] Select the natural diseased leaves in the field, wash the downy mildew sporangia on the back of the leaves with 4°C distil...

Embodiment 2

[0061] According to the screened optimal compounding ratio of ethanol crude extract of wheat straw and eugenol 30:1, a compound fungicide of 31% ethanol crude extract of small wheat straw and eugenol was prepared, which contained 30% wheat straw ethanol crude extract and 1% eugenol. In the field, 30% wheat straw ethanol crude extract WP 800 times, 0.3% eugenol SL 800 times tank mix, and 50% dimethomorph WP 1500 times were used as control agents to carry out field efficacy tests.

[0062] The test object is downy mildew.

[0063] The experimental crop is grapes, and the experimental grape varieties are selected from gems.

[0064] environmental conditions

[0065] The hedgerow cultivation in the experimental park is 9 years old, and the occurrence of downy mildew is common and uniform over the years. During the test period (August 1-August 30) the grape growth period to the new shoot growth period. The cultivation conditions and tree growth of all experimental plots were co...

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Abstract

The invention relates to the field of biopesticides, in particular to a biopesticide for preventing and treating downy mildew, which is prepared by compounding wheat straw ethanol dried crude extract,eugenol and conventional auxiliary additives, wherein the mass ratio of the wheat straw ethanol dried crude extract to the eugenol is 50: 1-1: 50. The prevention and control effect of the biogenic pesticide wheat straw ethanol crude extract and eugenol on grape downy mildew after independent use and compounding is determined through an indoor toxicity determination test and a field test, and theoptimal ratio of the two biogenic pesticides is determined for production, so that the purposes of reducing pesticide environmental pollution and reducing the occurrence and development of drug resistance of germs are achieved, wherein the wheat straw ethanol crude extract and eugenol both show a synergistic effect in a ratio range of (50: 1)-(1: 35), the synergistic effect is maximum in a ratio of 30: 1, and the synergistic coefficient is 1.87, after compounding, germs are not easy to generate drug resistance, and environmental pollution is not easy to cause.

Description

technical field [0001] The invention relates to the field of biological pesticides, in particular to a biological pesticide for preventing and treating downy mildew. Background technique [0002] Downy mildew is an important leaf disease on grapes, cucumbers, cabbage and other crops. It occurs seriously every year and causes huge losses. The current control technology is mainly based on chemical control. Ling, thiophanate-methyl, etc.) are used frequently and in a large area, and more serious drug resistance has emerged. The use of a large number of chemical pesticides has caused serious ecological damage and at the same time brought food safety problems. The development and utilization of bio-pesticide resources that are compatible with the environment and are harmless to humans have also become the research focus and hotspot of researchers. [0003] Our previous research found that intercropping wheat has a good control effect on grape downy mildew, but fruit trees need ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N31/16A01N65/44A01P3/00
CPCA01N31/16A01N65/00A01N65/44
Inventor 谭伟李庆亮崔荣慰程云飞魏丽娜王德亚曹辉孙夏
Owner ZAOZHUANG UNIV
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