Green Prevention and Control Technology Scheme of Tobacco Black Shank Based on Healthy Cultivation and Precise Chemical Application
- Received Date: 05/01/2023
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Key words:
- tobacco black shank /
- seedling substrate mix technology /
- precise chemical application /
- healthy cultivation /
- green prevention and control
Abstract: Tobacco black shank disease seriously threatens the development of the tobacco industry in tobacco growing areas. It is difficult to control and has a wide range of effect. At present, the main measures to control tobacco black shank are the optimization of cultivation management measures, chemical and biological pesticide prevention andcontrol. However, there are many drawbacks of single control method, so it is urgent to seek new strategies to prevent and control tobacco black shank. This article mainly introduces a green tobacco black shank prevention and control technology system. The soil problems in the tobacco planting area were regulated and the resistance of tobacco plants were improved by using antagonistic bacterial agent substrate mixing technology, organic fertilizer mixing technology, resistance induction technology, precise chemical application technology, medium and micro elements supplementation technology. The research set up the treated and non-treated areas in Yanbian Heai, Panzhihua, The treatment significantly promoted the growth and development of tobacco plants. The plant height, stem circumference and maximum leaf area were 121.27%, 27.14% and 154.85% higher than those of the control at the rosette stage. The plant height, stem circumference, effective leaf number and maximum leaf area of the plants in the treatment area were 26.99%, 45.01%, 16.67% and 124.32% higher than those in the control area at the vigorous stage.The results showed that the incidence of tobacco black shank in the treatment area was always less serious than that in the non-treatment area. The incidence of tobacco black shank in the treated area was 41.69% and the disease index was 27.10, while the incidence of tobacco black tibia in the non-treated area was 6.85% and the disease index was 1.95. The relative prevention efficiency of tobacco black shank in the treated area was 92.80% compared with that in the non-treated area, which significantly reduced the incidence of tobacco black shank and improved the resistance of tobacco plant to black shank. It significantly reduced the occurrence of tobacco black shin disease, to provide theoretical basis and technical support for future application of integrated control of tobacco black shank.