Method of control Phytophthora parasitica var. nicotianae Resistance to Metalaxyl

A technology of tobacco black shank and tobacco black shank, which is applied in the fields of plant protection and pesticides

Inactive Publication Date: 2007-09-12
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 shan...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Demonstration of control experiment of tobacco black shank resistance to metalaxyl in Banqiao Town, Luoping County, Qujing City

[0028] According to the survey on the resistance of tobacco black shank to metalaxyl, tobacco black shank disease in Banqiao Town, Luoping County, Qujing City has developed a relatively high level of resistance to metalaxyl. In 2006, the demonstration of resistance control experiments was carried out in the town, combined with the selection of disease-resistant varieties; the implementation of reasonable crop rotation; fine soil preparation, scientific ridging; timely and early planting; hygienic cultivation; Junke and Xiu'an, which have negative cross-resistance with metalaxyl, were used alternately according to the conventional dosage and application method to control tobacco black shank. The results of the survey on resistance management are shown in Table 2. The results showed that the disease index of tobacco black shank dise...

Embodiment 2

[0030] Example 2: Demonstration of control experiment of tobacco black shank resistance to metalaxyl in Zhongshan Township, Luoping County, Qujing City

[0031] According to the survey on the resistance of tobacco black shank to metalaxyl, the tobacco black shank disease in Zhongshan Township, Luoping County, Qujing City has developed a relatively high level of resistance to metalaxyl. In 2006, the demonstration of resistance control was carried out in the township, combined with the selection of disease-resistant varieties; the implementation of reasonable crop rotation; fine soil preparation, scientific ridging; timely and early planting; hygienic cultivation; Junke and Xiu'an, which have negative cross-resistance with metalaxyl, were used alternately according to the conventional dosage and application method to control tobacco black shank. The results of the survey on resistance management are shown in Table 3. The results showed that after adopting resistance control mea...

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Abstract

The present invention relates to method of tackling Phytophthora parasitica var. nicotianae with resistance on metalaxyl, and belongs to the field of plant protection and agricultural chemical technology. The present invention screens out two kinds of germicides, including Junke and Xiuan, with negative cross resistance to metalaxyl for applying alternately to prevent and control Phytophthora parasitica var. nicotianae with resistance on metalaxyl. The present invention has simple operation, high effect, reduced agricultural chemical residue, raised tobacco safety and other advantages.

Description

Technical field: [0001] The invention relates to a method for controlling 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 bacteria Tobacco black shank is one of the world's major diseases of tobacco which is widely distributed and seriously harmful. Tobacco black shank can infect and damage tobacco at any growth stage, but it mainly damages tobacco plants in the field stage. The onset at the seedling stage often causes the tobacco seedlings to die in pieces and become damped-off; the onset at 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. Since the 1980s in my...

Claims

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Application Information

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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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