几种药剂对秋甘蓝田菜蚜及节肢动物群落的影响

目的]筛选对秋甘蓝田菜蚜具有较好防治效果的药剂。方法]研究了吡蚜酮、阿维菌素、氯虫苯甲酰胺、阿.吡混剂、阿.氯混剂和吡.氯混剂6种药剂处理对秋甘蓝田菜蚜及节肢动物群落的影响。结果]阿维菌素、氯虫苯甲酰胺及阿.氯混剂对菜蚜的防治效果均不理想,药后7 d防效分别仅为20.21%、15.95%和27.49%。吡蚜酮及阿.吡混剂、吡.氯混剂对菜蚜均有很好的防治效果,药后7 d防效分别达97.37%、94.52%和93.29%,同时可显著提高甘蓝田节肢动物群落的多样性和益害比,有助于提高甘蓝田节肢动物群落的稳定性和天敌对害虫的自然控制作用。结论]为实行甘蓝田菜蚜科学有效的综合治理提供了理论依据。

Effects of Several Insecticides on Turnip Aphid and Arthropod Community in Autumn Cabbage Fields

Objective] The aim was to screen out insecticides which had good control effects on turnip aphid(Lipaphis erysimi) in autumn cabbage fields.Method] The effects of 6 insecticide treatments like pymetrozine,abamectin,chlorantraniliprole,mixture of abamectin and pymetrozine,mixture of abamectin and chlorantraniliprole and mixture of pymetrozine and chlorantraniliprole on L.erysimi and arthropod community in autumn cabbage fields were studied.Result] The control effects of abamectin,chlorantraniliprole and mixture of abamectin and chlorantraniliprole on L.erysimi were not satisfied with the control effects(7 days after treatment) of 20.21%,15.95% and 27.49% respectively.Pymetrozine,mixture of abamectin and pymetrozine and mixture of pymetrozine and chlorantraniliprole had satisfactory control effects on L.erysimi with the control effects(7 days after treatment) of 97.37%,94.52% and 93.29% respectively,and were able to raise the diversity and the ratio of natural enemies to insect pests of arthripod community in cabbage fields evidently,so they were helpful to raise the stability of the community and the natural control effects of natural enemies on insect pests.Conclusion] The research results provide theoretical basis for the comprehensive control of turnip aphid in autumn cabbage fields.