长沙烟区天敌昆虫物种多样性及其与主要害虫的消长动态

Species Diversity of Natural Enemy Insects and Population Dynamic of Main Pest Insects in Changsha Tobacco Areas

摘要: 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。

Abstract: Species diversity of natural enemy insects and population dynamic of main pest insects in Changsha tobacco areas were studied through wulti-site investigation and focused monitoring from 2014 to 2015. The results showed that 18 species of natural enemy insects were observed, including 5 dominant species, including Harmonia axyridis, Propylaea japonica, Coccinella septempunctata, Paederus fuscipes and Campoletis chlorideae. The numbers of species and individuals of natural enemy insects were small, and the control capacity against main pest insects was weak. Species diversity of natural enemy insects was the highest in June. The relationship between Myzus persicae and its natural enemy insects exhibited a hysteresis phenomenon, while the relationship between Lepidoptera pests and natural enemy insects exhibited a following phenomenon.