8种药剂对斯密二鬃蓟马成虫的室内毒力

Toxicity of Eight Insecticides to Adults of Dichromothrips smithi (Zimmermann)

[目的]筛选防治斯密二鬃蓟马的有效药剂。[方法]在室内采用浸叶法测定8种药剂对斯密二鬃蓟马成虫的毒力。[结果]药剂处理24 h后,阿立卡、联苯菊酯、烯啶虫胺、吡虫啉、氰氟虫腙对斯密二鬃蓟马成虫的LC50分别为5.505 3、7.945 4、42.747 1、69.593 3、578.344 1 mg/L;药剂处理12 h后,甲维盐、虫螨腈·甲氨基阿维菌素苯甲酸盐、毒死蜱对斯密二鬃蓟马成虫的LC50分别为0.019 0、0.071 6、0.256 5 mg/L。[结论]8种杀虫剂中甲维盐、毒死蜱、虫螨腈·甲氨基阿维菌素苯甲酸盐对斯密二鬃蓟马成虫有较好的毒杀效果。甲维盐、虫螨腈·甲氨基阿维菌素苯甲酸盐属于生物源农药,且毒性较高,是高级花卉、无公害花卉生产中防治斯密二鬃蓟马的较理想药剂。

[Objective]The aim was to screen out effective agents to control Dichromothrips smithi（Zimmermann） .[Method]We tested the toxicity of eight insecticides to adults of Dichromothrips smithi （Zimmermann） in lab by using leaf dipping method.[Result]The LC50 of five insecticides in 24 h after treatment from high to low was in order of thiamethoxam＆#183;lambda-cyhalothrin（5.505 3 mg/L）,bifenthrin（7.945 4 mg/L）,nitenpyram（42.747 1 mg/L）,imidacloprid （69.593 3 mg/L） and metaflumizone（578.344 1 mg/L）.However,the LC50 of three insecticides in 12 h after treatment from high to low was in order of emamectin benzoate（0.019 0 mg/L）,chlorfenapyr·emamectinbenzoate（0.071 6 mg/L） and chlorpyrifos（0.256 5 mg/L）.[Conclusion]It was suggested that toxicities of emamectin benzoate,chlorpyrifos and chlorfenapyr emamectin to adults of Dichromothrips smithi（Zimmermann） were powerful.Emamectin benzoate and chlorfenapyr＆#183;emamectin benzoate belong to biological pesticide and have high toxicity.They are ideal reagents to control Dichromothrips smithi （Zimmermann） .