不同药剂对三亚地区豇豆上普通大蓟马的毒力

Toxicity of different pesticides to cowpea thrips Megalurothrips usitatus(Bagnall)in Sanya area

采用叶管药膜法在室内测定了7种药剂对三亚6个镇的豇豆上普通大蓟马的毒力。结果表明,相同药剂对不同的镇区的普通大蓟马种群表现出不同的毒力,乙基多杀菌素、多杀菌素、甲氨基阿维菌素苯甲酸盐对蓟马田间种群表现出很高的毒力水平,建议轮换使用这些药剂;而吡虫啉和噻虫嗪的室内毒力表现较低水平,不建议使用。

Toxicities of seven insecticides to Megalurothrips usitatus（Bagnall）on cowpea fields from Sanya,Hain-an Province were tested by TIBS method. The results indicated that the same pesticide had different toxicities to the six thrip populations. Spinetoram,spinosad and emamectin benzoate had higher toxicities than thiamethoxam and imidacloprid,which were recommended to be used alternatively in M. usitatus control.