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为明确植物源杀虫剂在椰心叶甲防控中的作用,采用叶片浸渍法和浸虫法测定了烟碱、苦参碱、鱼藤酮和印楝素对椰心叶甲的室内毒力。结果表明:供试4种植物源杀虫剂对椰心叶甲蛹和成虫的毒力没有明显差异,对卵的毒力测定中,烟碱、苦参碱和鱼藤酮对椰心叶甲卵的毒力明显高于印楝素,LC50值分别为8.46、8.59、9.45、14.79 mg/L。对幼虫的毒力测定中,烟碱表现出较强的生物活性,对1～5龄幼虫的LC50值分别为7.18、7.74、7.98、9.31、9.59 mg/L。
In order to clarify the role of plant-derived insecticides in the prevention and control of Coconut palmleaf, the indoor toxicity of nicotine, matrine, rotenone and azadirachtin to Coconut palmilanko was determined by leaf dipping method and soaking method. The results showed that there was no significant difference in the virulence of the four plant-derived insecticides against the pupae and adults of C. catechu. The toxicities of nicotine, matrine and rotenone to coccolith’s eggs were significantly higher than those of the Indian Toosendanin, LC50 values were 8.46,8.59,9.45,14.79 mg / L. Nicotine showed strong biological activity against larvae, and LC50 values of 7.18, 7.74, 7.98, 9.31 and 9.59 mg / L for 1st to 5th instar larvae, respectively.