食料对烟草甲药剂敏感性及共生菌和解毒酶活性的影响

Effects of Diets on Susceptivity to Insecticides, Yeast-like Symbionts and Activity of Detoxifying Enzymes in Cigarette Beetles

摘要: 从食料-昆虫-药剂三者的关系出发，研究了由甘草、麦粒和烤烟3种食料饲养的烟草甲幼虫对药剂敏感性及其体内共生菌数量和酶活性的变化。结果表明，取食不同食料的烟草甲幼虫对供试杀虫剂的敏感性有较明显的差异，以麦粒饲养的烟草甲幼虫耐药性最强，烟草和甘草饲养的较弱。麦粒饲养的烟草甲幼虫中肠处的共生菌数量明显多于其它2种食料饲养的。同时，食料也不同程度地影响了烟草甲幼虫体内的解毒酶活性。

Abstract: From the diet-insect- insecticide's relation, the influence of diets on the larvas of cigarette beetles was investigated. The diets included liquorice, kernel and flue-cured tobacco. The results showed that the diets could apparently change the susceptivity of larvas of cigarette beetles to insecticides, and the larvas fed with kernel featured the strongest resistance, and the larvas fed with liquorice showed the weakest resistance. The diets also had a evident effect on abundance of yeast-like symbionts (YLS) in the body of 5th instar larvas. The larvas fed with kernel had more YLS than the others. Besides, the diets also affected the activity of detoxifying enzymes ( CarE and GSTs) of larvas.