氯虫·高氯氟等杀虫剂对紫花苜蓿上甜菜夜蛾田间药效评价

Evaluation on the Field Control Effects of Some insecticides such as chlorantraniliprole·Lambda-cyhalothrin for Control of Beet armyworm on Alfalfa

【目的】筛选出防治苜蓿上甜菜夜蛾的高效、安全杀虫剂及最佳使用剂量，为科学防治提供依据。【方法】以氯虫·高氯氟等4种药剂，每药剂3个剂量进行田间药效对比试验。【结果】氯虫·高氯氟等3种杀虫剂对苜蓿田甜菜夜蛾药效高，持效好。【结论】氯虫·高氯氟田间推荐使用的剂量为28～37-3mg／L，氟啶脲田间推荐使用剂量为233．3—333-3mg／L，阿维菌素推荐使用的剂量为10～20mg／L。

[Aims] In order to control beet armyworm（Spodoptera exigua Hubner） on alfalfa（Medicago sativa L.） scientifically, several insecticides with high efficacy and safety and their optimal dosages were screened out. [Methods] The contrast tests among four insecticides e.g. chlorantraniliprole lambda-eyhalothrin were carried out with three doses per pesticide. [Results] The field trial results showed that three pesticides such as chlorantraniliprole. Lambda-cyhalothrin exhibited sustainable and highly efficiency against beet armyworm on alfalfa. [Conclusions] The recommended usage in fields of chlorantraniliprole, lambda-cyhalothrin was 28-37.3 mg/L, chlorfluazuron was 233.3- 333.3 mg/L, avermectin wasl0-20 mg/L.