Method for preventing and treating tobacco target leaf spot

A target spot disease and tobacco technology, applied in the field of tobacco target spot disease prevention and control, can solve the problems of reduced quality and yield of tobacco leaves, obstacles to the production of various crops, threats to tobacco production, etc., to achieve good killing, prolong the drying time, and avoid The effect of drug resistance

Pending Publication Date: 2021-04-20
云南省烟草公司普洱市公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tobacco target spot bacteria can not only infect tobacco, but also cause damage to many crops such as tomato, eggplant, sugar beet, etc., causing great obstacles to the production of various crops
Tobacco target spot disease mainly infects tobacco leaves, and can occur from the seedling stage to the mature stage in the field. The fungus mainly damages the leaves to form lesion spots, and the necrotic parts of the lesion spots are fragile and form perforations. When it occurs seriously, the lesion spots are connected and the disease is popular. The speed is fast, once it spreads rapidly, the contiguous occurrence will reduce the quality and yield of tobacco leaves, posing a serious threat to tobacco production

Method used

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  • Method for preventing and treating tobacco target leaf spot
  • Method for preventing and treating tobacco target leaf spot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In early February, the soil was deeply ploughed in the tobacco field for sun drying; before and after deep ploughing, the residues of diseased plants in the field and the weeds around the tobacco-planting plot were removed; after sun drying, 200kg of lime per mu was evenly spread on the surface of the field; raking was carried out one day later. After the tobacco seedlings were transplanted into the field, when disease spots were found on the tobacco seedlings, 10% Jinggangmycin water and 30% benzyl propiconazole EC (love seedlings), 25% trifloxystrobin • 50% tebuconazole; when it is found that there are tobacco seedlings with field symptoms, spray 30% benzyl propiconazole EC (love seedlings) in time to remove the diseased leaves and treat the diseased leaves. Centralized disinfection.

Embodiment 2

[0023] In mid-January, the soil was deeply ploughed in the tobacco field for sun drying; before and after the deep ploughing, the residues of diseased plants in the field and the weeds around the tobacco-planting plot were removed; after sun drying, 150kg of lime was evenly spread on the surface of the field per mu; after 2 days, the Rake the land, and continue to dry for 20 days after the completion; after the tobacco seedlings are transplanted into the field, when disease spots are found on the tobacco seedlings, 10% Jinggangmycin water agent and 30% benzyl propiconazole EC are sprayed alternately in time. (Aimiao), 25% trifloxystrobin • 50% tebuconazole; when it is found that there are field symptoms in tobacco seedlings, spray 25% benzyl Propiconazole EC (Aimiao) in time to remove the diseased leaves and prevent the disease. Leaves are disinfected centrally.

Embodiment 3

[0025] In mid-December, the soil was deeply ploughed in the tobacco fields for drying; before and after deep ploughing, the residues of diseased plants in the field and the weeds around the tobacco-planting plot were removed; Rake the land, and continue to dry for 30 days after the completion; after the tobacco seedlings are transplanted into the field, when disease spots are found on the tobacco seedlings, alternately spray 10% Jinggangmycin water and 30% benzyl-propiconazole EC ( Love seedlings), 25% trifloxystrobin • 50% tebuconazole; when it is found that there are tobacco seedlings with field symptoms, spray 35% benzyl propiconazole EC (love seedlings) in time to remove the diseased leaves and treat the diseased leaves in time. Perform centralized disinfection.

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Abstract

The invention discloses a method for preventing and treating thanatephorus cucumeris. The method comprises the following steps of 1) conducting deep ploughing and upturned soil sunning on cultivated land from the late winter to the early spring, removing diseased plant residues and surrounding weeds in the cultivated land, uniformly spreading lime on the surface of the cultivated land after upturned soil sunning, harrowing the earth within 3 days, and continuously sunning upturned soil for more than 15 days after harrowing; and (2) after tobacco seedlings are transplanted, alternately spraying the following agents from the beginning of generation of disease spots, wherein the agents include a 10% validamycin aqueous solution, 30% benzoyl.propiconazole EC and 75% trifloxystrobin tebuconazole. According to the method, antibacterial treatment is carried out in two different stages from tobacco seedling transplanting to field planting stage management by combining the propagation characteristics of pathogenic bacteria of the thanatephorus cucumeris, deep ploughing, upturned soil sunning and disinfection are carried out on the cultivated land from the late winter to the early spring, the upturned soil sunning time is prolonged, and therefore pathogenic spores of the thanatephorus cucumeris can be better killed; and the different bactericidal agents are alternately applied after transplanting, so that drug resistance of tobacco plants is avoided, a good prevention and treatment effect is achieved, and the safety of tobacco planting is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of tobacco disease prevention and control, and in particular relates to a method for preventing and treating tobacco target spot disease. Background technique [0002] Tobacco target leaf spot pathogen is Thanatephorus cucumeris (Frank) Donk, which is distributed in many countries and regions, and occurs in Brazil, Costa Rica, the United States, South Africa, and Italy, with serious harm. The disease first occurred in a large area in Dandong City, Liaoning Province, my country in 2005, and was officially reported in 2006. Since its discovery, its epidemic trend has been increasing, among which Dandong City and Tieling City are the most serious in Liaoning Province, and it has become the main disease of tobacco production in this area. There are also sporadic occurrences in Guizhou Province, the southwestern tobacco area. Tobacco target spot disease can not only infect tobacco, but also harm many crops such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/45A01G13/00
Inventor 刘剑金申朋辉周意霖崔发凯王阳张正才苏锡鹏李波陈臻王桂芝周云松汪林涛张志国王学坚
Owner 云南省烟草公司普洱市公司
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