鳞柄白毒鹅膏菌和毒芹的复合毒素粗提物对杨干象的毒效

[目的]探讨鳞柄白毒鹅膏菌和毒芹的毒素粗提物的复合物对杨干象的毒杀效果,为微生物杀虫剂的开发与利用提供理论依据。[方法]采用堵孔法测定不同浓度鳞柄白毒鹅膏菌、毒芹的毒素粗提物及二者的复合物对杨干象的毒杀效果。[结果]鳞柄白毒鹅膏菌和毒芹的毒素粗提物及二者的复合物均对杨干象具有毒杀作用。施药24 h后,鳞柄白毒鹅膏菌和毒芹的毒素粗提物对杨干象都有显著毒杀效果,最高浓度时杀虫率分别达81.10%和84.43%,后者的毒杀效果明显优于前者。鳞柄白毒鹅膏菌和毒芹的毒素粗提物的复合物在48 h内可达到100%的杀虫率,该复合物对杨干象在12、24、48、72 h的半致死浓度(LC50)分别是74.669、56.123、45.343、39.115mg/m L。[结论]鳞柄白毒鹅膏菌和毒芹的毒素粗提物的复合物作为一种复合微生物杀虫剂,对杨干象有显著的防治效果。

Toxic Effects of Composite Tox in Crude Extracts of Amanita virosa and Cicuta virosa L.on Cryptorhynchus lapathi L

Objective] To discuss the toxic effects of composite toxin crude extracts of Amanita virso a and Ci cuta virosa L.on Cryptorhynchus lapathi L., and to provide new theoretical foundation for the development and utilization of microbial pesticide .[ Method] We detected the toxic effects of toxin crude extracts of A.virosa and C.viros and the composite of the two on C.lapathi.[Result ] Crude extracts of A.virosa and C. viros and the composite of the two had toxic effects on C.lapathi.After administration for 24 h, crude extracts of A.virosa and C.iv ros had sig-nificant toxic effects on C.lapathi.The killing rates reached 81.10%and 84.43%, respectively, at the highest concentration.The toxic effects of the latter was superior to that of the former.Composite of the two reached 100%killing rate within 48 h.Semi-lethal concentrations (LC50) at 12, 24, 48 and 72 h were 74.669, 56.123, 45.343 and 39.115 mg/mL, respectively.[Conclusion] Composite of the crude extracts of A.iv rosa and C.viros has significant control effects on C.lapathi as a kind of compound microbial pesticide.