【摘要】 采用浸渍法和分光光度法进行了豇豆荚螟对阿维菌素的敏感性分析。结果表明,不同种群豇豆荚螟对阿维菌素的敏感性存在明显差异。从两院豇豆荚螟种群对阿维菌素的LC50抗性比值可以看出,定安和东方豇豆荚螟种群对阿维菌素的抗药性分别提高3.5701倍和2.8650倍;羧酸酯酶活性测定结果表明,用阿维菌素18、9、4.5、3、0.225mg/kg处理豇豆荚螟后,各处理豇豆荚螟的羧酸酯酶活性均明显增强。上述结果表明,豇豆荚螟种群对阿维菌素的敏感性降低主要是由于羧酸酯酶活性显著增强所致。更多还原

【Abstract】 The susceptibility of Maruca testutalis Geyer to abamectin was studied by leaf immersion method and spectrophotometry. The results showed that Maruca testutalis in different areas had different susceptibility to abamectin; the resistance of Maruca testutalis increased 3.5701-fold in Dingan and 2.8650-fold Dongfang based on the results of the LC50 of Maruca testutalis in Liangyuan LC50,the bioassay of carboxylesterase indicated that carboxylesterase activity in Maruca testutalis significantly increased after treated by abamectin 18,9,4.5,3,0.225 mg/kg. The results above all showed that the susceptibility of Maruca testutalis to abamectin declined mainly because of carboxylesterase activity in Maruca testutalis significant increase.更多还原