棉蚜的发生及生物因素对种群数量的控制作用

目的]研究防治棉蚜的有效方法。方法]通过田间调查，明确棉蚜种群的发生以及生物因素对其数量的控制作用。结果]棉蚜对温度的适应范围较宽，以18～25℃为群体增长及活动危害的适宜温度。结论]以棉花苗期吡虫啉＋氧化乐果复配剂涂茎，结合棉花生长期生物防治为主要防治策略。

Occurrence of Aphid and Control of Biological Factors on Population

Objective ] The research aimed to study the effective control method of Aphis gossypii Glover. Method] The occurrence of Aphis gossypii Glover and the control of biological factors on the population amount were studied based on the field tests. Result] The range of tem- perature adjustment for Aphis gossypii Glover was wide. The appropriate temperature of colony increase and activity was 18 -25 ℃. Conclusion ] The main control strategy was imidaeloprld and omethoate spread on cotton seedlings at seedling stage combined with biological control at cotton seeding period.