6种植物精油对联苯菊酯触杀活性的影响

Effect of Six Essential Oils on the Contact Toxicity of Bifenthrin

采用点滴法测定了香樟、土荆芥、黄花蒿、波斯菊、留兰香、蓝冰柏等6种植物精油与98%联苯菊酯杀虫剂联用对灰茶尺蠖2龄幼虫的触杀活性。结果表明,除波斯菊精油外,其他精油随着浓度的增加,灰茶尺蠖幼虫的死亡率逐渐增高;98%联苯菊酯杀虫剂的半数致死浓度LC50为195.763μg/mL。精油与杀虫剂联用,香樟精油和留兰香精油提高了联苯菊酯对灰茶尺蠖幼虫的触杀活性,土荆芥精油和黄花蒿精油未影响联苯菊酯的触杀活性,而波斯菊和蓝冰柏精油降低了联苯菊酯的触杀活性。研究结果为植物精油在害虫防治中的应用提供了理论依据。

The combination of 6 plant essential oils,which were extracted from Cinnamomum camphora,Chenopodi⁃um ambrosioides L.,Artemisia annua L.,Cosmos bipinnata,Mentha spicata Linn,Cupressus glabra‘Blue Ice’,and 98%bifenthrin to the 2nd instar larvae of E.grisescens were investigated by micro-drop method.The results showed that the mortality rate of E.grisescens larvae increased with the increase of concentration except the essential oil from C.bipinnata,and the LC50 of 98%bifenthrin was 195.763μg/mL.When the essential oil was mixed with insecticides,the essential oil from C.camphora and M.spicata significantly improved the contact effect of bifenthrin;C.ambrosioi⁃des and A.annua essential oil had no effect on the contact of bifenthrin.However,the essential oil from C.bipinnata and C.glabr‘Blue Ice’decreased the contact effect of bifenthrin,which will provide a theoretical foundation for ap⁃plication of plant essential oil in pest management.