Method of control Phytophthora parasitica var. nicotianae Resistance to Metalaxyl

A technology for tobacco black shank and tobacco black shank bacteria, applied in the fields of plant protection and pesticides

Inactive Publication Date: 2009-10-07
YUNNAN ACAD OF TOBACCO AGRI SCI
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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 develop and apply the resistance control technology after tobacco black shank produces resistance to metalaxyl, solve the problem of prevention and treatment of black shank in tobacco production, through the interaction of black shank bacteria to metalaxyl drug resistance Resistance studies, development of a cost-effective method for managing tobacco black shank resistance to metalaxyl

Method used

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  • Method of control Phytophthora parasitica var. nicotianae Resistance to Metalaxyl
  • Method of control Phytophthora parasitica var. nicotianae Resistance to Metalaxyl
  • Method of control Phytophthora parasitica var. nicotianae Resistance to Metalaxyl

Examples

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Effect test

Embodiment 1

[0029] Example 1: Test demonstration of metalaxyl resistance treatment of tobacco black shank in Banqiao Town, Luoping County, Qujing City

[0030] According to the survey on the resistance of tobacco black shank to metalaxyl, the tobacco black shank of Banqiao Town, Luoping County, Qujing City has developed a high level of resistance to metalaxyl. In 2006, the town conducted a demonstration of resistance management experiments, combined with the selection of disease-resistant varieties; implementation of reasonable crop rotation; fine soil preparation and scientific ridging; timely and early planting; hygienic cultivation; timely removal of film and other cultivation techniques, according to the occurrence of black shank Junke and Xiu'an, which have negative cross-resistance to metalaxyl, were selected and used alternately to prevent tobacco black shank in accordance with conventional dosage and application methods. The results of the investigation of resistance management are sh...

Embodiment 2

[0033] Example 2: Experimental demonstration of treatment of metalaxyl resistance to tobacco black shank in Zhongshan Township, Luoping County, Qujing City

[0034] According to the survey on the resistance of tobacco black shank to metalaxyl, it is shown that tobacco black shank has developed a high level of resistance to metalaxyl in Zhongshan Township, Luoping County, Qujing City. In 2006, the township conducted resistance control experiments and demonstrations, combined with the selection of disease-resistant varieties; reasonable crop rotation; fine soil preparation and scientific ridging; timely and early planting; hygienic cultivation; timely removal of film and other cultivation techniques, according to the occurrence of black shank Junke and Xiu'an, which have negative cross-resistance to metalaxyl, were selected and used alternately to prevent tobacco black shank in accordance with the conventional dosage and application method. The results of the resistance management s...

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Abstract

The invention relates to a method for controlling the resistance of tobacco black shank bacteria to metalaxyl, and belongs to the fields of plant protection and pesticide science. The invention screens out two chemical pesticides, Junke and Xiu'an, which have negative cross-resistance with metalaxyl, and replaces metalaxyl with alternate application in the production of flue-cured tobacco to prevent and control tobacco black shank that is resistant to metalaxyl. The present invention identifies tobacco black shank pathogen Phytophthora parasitica var. Two kinds of chemical pesticides with negative cross-resistance to metalaxyl were installed, and combined with agricultural cultivation technology measures to control the resistance of tobacco black shank to metalaxyl. The invention has the advantages of simple operation, high control effect, reducing the use of chemical pesticides, reducing pesticide residues in tobacco leaves, improving the safety of tobacco leaves, prolonging the service life of pesticides, etc., and has good application prospects in the control of tobacco black shank drug resistance .

Description

Technical field: [0001] The invention relates to a method for treating the resistance of tobacco black shank to metalaxyl, and belongs to the fields of plant protection and pesticide science. Background technique: [0002] Tobacco black shank was first discovered and described by Breda de Haan in Java, Indonesia in 1896, and named it Phytophthora parasitica var.nicotianae (Breda de Hean) Tucker, caused by the pathogen Tobacco black shank is one of the major tobacco diseases in the world with widespread and serious damage. Tobacco black shank bacteria can infect and damage tobacco at any growth stage, but it mainly damages tobacco plants in the field stage. The disease in the seedling stage often causes the tobacco seedlings to die in pieces and become damping-off; the disease in the field stage can cause the entire tobacco plant to wither suddenly and accompanied by the symptoms of blackening of the roots or stem bases, often causing irreparable losses. After the 1980s in my coun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/20A01P3/00A01N47/36
Inventor 祝明亮李梅云曾嵘白江兰
Owner YUNNAN ACAD OF TOBACCO AGRI SCI
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