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采用多点调查和集中监测的方法对长沙烟区烟田天敌昆虫物种多样性及其与主要害虫的消长规律进行了调查和研究。共记录烟田害虫天敌昆虫18种,优势种5种,包括异色瓢虫、龟纹瓢虫、七星瓢虫、隐翅虫和棉铃虫齿唇姬蜂;天敌物种个体数相对较少,对烟田主要害虫的控制能力较弱;烟田天敌昆虫物种多样性系数以每年的6月最大;烟蚜及其天敌发生规律呈滞后现象,而鳞翅目害虫与其天敌主要呈跟随现象。
The species diversity of natural enemies and their growth and decline with the main pests in tobacco fields of Changsha tobacco were investigated by multi-point survey and centralized monitoring. A total of 18 species of insect pests were recorded, and 5 dominant species were recorded, including C. heterochina, Propylaea japonica, Coccinella septempunctata, Propylaea japonica and Helicoverpa armigera. Relatively few individuals were natural enemies The main insect pests in tobacco fields had weaker control ability. The coefficient of species diversity of natural enemy insects in tobacco fields was the largest in June of each year. The law of larvae and its natural enemies lagged behind, while the lepidopteran pests and their natural enemies were mainly followed.