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调查了棉田棉蚜主要天敌 (瓢虫、草蛉、食虫蝽和蜘蛛类 )的种群数量动态。棉蚜天敌在不化学防治的棉田内 ,能建立稳定的自然种群 ,对棉田前期发生早、数量多的棉蚜不能有效控制 ,对棉田内发生晚的棉蚜能有效的控制 ;在化学防治棉田内 ,由于用药频繁 ,几乎无天敌 ,所以无控制作用 ;在综合防治棉田内 ,能建立稳定种群结合其它辅助措施 ,能有效控制蚜害 ,经济效益显著
The population dynamics of main natural enemies (ladybugs, weeds, carnivores and spiders) in cotton aphids were investigated. Cotton aphid natural enemies in the chemical control of cotton fields, the establishment of a stable natural population, early cotton fields early, the number of cotton aphids can not be effectively controlled, cotton aphid occurred late in the field can be effectively controlled; chemical control in cotton fields , There is no control effect due to the frequent use of drugs and almost no natural enemies. In integrated cotton fields, stable populations can be established in combination with other auxiliary measures to effectively control aphid damage and have obvious economic benefits