清江流域烟草病虫害发生与防治技术研究
Occurrence and Control Technique of Tobacco Diseases and Insects Pests in Tobacco-growing Areas around Qingjing River
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摘要: 调查了清江流域的烟草病虫害发生种类,分析了植物源农药和综防技术在该产区的应用价值。结果表明,清江源烟区烟草侵染性病害20种,害虫2纲8目25科90余种,烟草害虫天敌种类2纲7目80余种;外施0.3%苦参碱后,中部和下部烟叶化学成分更具协调性,中部烟叶感官质量的综合得分高于对照样品,且对烟青虫和烟蚜有很好的防治效果,值得推广应用;通过实施综合防治技术,有效减少了烟草病虫害的发生,降低了防治成本,提高了烟叶产质量。Abstract: Categories of tobacco diseases and insects pests were investigated, and the application values of botanical pesticide and integrated control techniques were analyzed in tobacco-growing areas around Qingjing river. The results indicated that: (1) There were 20 species of infectious disease, more than 90 species within 25 families, 8 orders in 2 classes of insects pests, more than 80 species within 7 orders in 2 classes of their natural enemies. (2) After using matrine, the chemical compositions of middle and lower leaves were more harmonious. The composite score of smoking quality of middle leaves was higher than CK. Matrine had better efficiency for Helicoverpa assulta and Myzus persicae. (3) By using integrated control techniques, the occurrence of tobacco diseases and insects pests and the cost for control decreased largely, and the outputs and quality of tobacco leaves increased.