Method for preventing and controlling tobacco black shank by using biological diversity

Abstract

The invention relates to a preventing and controlling method for controlling tobacco black shank by using biological diversity. The method comprises the following steps of: planting green manure ryegrass in winter; planting distant economic crops with higher benefits, such as soya beans or mung bean and the like in the tobacco plant growing period in a field; and applying a biological anti-microbial agent Lv kangwei in the tobacco plant growing period in the field. The method can well control the tobacco black shank, and the relative preventing effects on soya bean and mung bean mode tobacco fields achieve 90.5 and 95.5 percent respectively. The method can improve soil environment, avoids environmental pollution brought by chemical prevention, and has the advantages of safety, efficiency and high popularization value at the same time.

Description

technical field [0001] The invention relates to the technical field of crop disease prevention and control, in particular to a method for preventing and treating tobacco black shank. Background technique [0002] Tobacco black shank is a soil-borne disease of tobacco. Its pathogen can survive continuously in the soil and overwinter, becoming the source of infection at the beginning of the next year. In addition, the current land resources in my country are limited, and tobacco is planted in a continuous cropping mode, which often leads to The large occurrence of tobacco black shank results in an average loss of 10% to 15% of the tobacco area, and 90% of the seriously diseased field, or even no harvest, causing huge economic losses to the tobacco industry in my country and the world. [0003] The traditional theory is that the most effective way to prevent and treat tobacco black shank is crop rotation, but the land resources suitable for growing tobacco are difficult to meet ...

AI Technical Summary

Problems solved by technology

[0002] Tobacco black shank is a soil-borne disease of tobacco. Its pathogen can survive continuously in the soil and overwinter, becoming the source of infection at the beginning of the next year. In addition, the current land resources in my country are limited, and tobacco is planted in a continuous cropping mode, which often leads to The large occurrence of tobacco black shank results in an average loss of 10% to 15% of the tobacco area, 90% of the seriously diseased fields, or even no harvest, causing huge economic losses to the tobacco industry in my country and the world

[0003] The traditional theory is that the most effective way to prevent and treat tobacco black shank is crop rotation, but the land resources suitable for growing tobacco are difficult to meet the needs of crop rotation. Moreover, if the tobacco fields are difficult to fix, it is necessary to select fields every year, which brings great difficulties to the construction of tobacco leaf bases. It is difficult for tobacco farmers to change crops frequently, and it is difficult for tobacco farmers to accept

Due to the lack of ideal preventive measures, chemical agents are often applied after the disease occurs, leading to problems such as soil compaction, pesticide residues, and increased resistance of diseases and insect pests, affecting the quality of tobacco leaves, which does not meet the requirements of "green agriculture, green tobacco"