【摘要】 苏云金杆菌H-14(Bacillus thuringiensis H-14,简称Bt H-14)杀灭蚊幼具有很高的效果。用18×10~3/ml Bt H-14(含芽孢数)处理致倦库蚊和白纹伊蚊效果可达100％。不同龄期和不同蚊种幼虫对Bt H-14敏感度不同。导致幼虫的死亡原因为晶体毒素使中肠细胞的细胞器发生病理改变,影响能量代谢和酶活性而死亡。少数晚期4龄幼虫吞食Bt H-14后可继续化蛹,但后代的繁殖均受到一定的影响。更多还原

【Abstract】 Treated with 18×103/ml solution of Bacillus Thuringiensis H-14 (Bt. H-14),the larvae of Culex Pipiens Quinquefasciatus and Aedes Albopictus were 100 percent killed. Sensitivity to this drug varies with different stages of both kinds of mosquitoes. The main cause of larva death was pathological changes, effects on metabolism of energy and enzyme activity in organellae of midgut cells caused by Bt. H-14’s crystal toxin. A few 4th instar larvae pupated after intake of Bt.H-14, however, their fertile ability was affected.更多还原