林玉英　金涛　王谨　金启安　温海波　彭正强

摘 要 测定不同发育阶段椰心叶甲的药剂敏感性差异。结果表明，低龄幼虫和成虫对高效氯氰菊酯和阿维菌素的敏感性高于高龄幼虫、蛹和卵。幼虫和成虫对啶虫脒的敏感性高于蛹和卵。卵的药剂敏感性最低。低龄幼虫期为最佳防治适期。椰心叶甲对3种杀虫剂的敏感性大小为高效氯氰菊酯>阿维菌素>啶虫脒。随着幼虫的发育，其体重由小变大，对高效氯氰菊酯和啶虫脒的敏感性降低，而幼虫对阿维菌素的敏感性与体重相关不显著。

关键词 椰心叶甲；发育阶段；药剂敏感性

中图分类号 TQ450.2 文献标识码 A

Abstract The differences of insecticide sensitivities of various developmental stages of Brontispa longissima （Gestro）were studied. The result showed that the insecticide sensitivities of low instar larvae and adults to beta-cypermethrin and avermectin were higher than those of higher instar larvae， pupae and eggs. The insecticide sensitivities of larvae and adults to acetamiprid were higher than those of pupae and eggs. The insecticide sensitivities of eggs were the lowest. The low instar larvae stages were the optimum control period. The susceptibility of B. longissima to 3 kinds of insecticides was the highest to beta-cypermethrin， followed by avermectin and acetamiprid. The insecticide sensitivities to beta-cypermethrin and acetamiprid decreased， as the weight increased from small to large with the development of lavae， however the insecticide sensitivities of larvae to avermectin were not significantly related to weight.

Key words Brontispa longissima （Gestro）；Developmental stage；Insecticide sensitivity

doi 10.3969/j.issn.1000-2561.2015.11.025

椰心葉甲[Brontispa longissima（Gestro）]， 属鞘翅目（Coleoptera）铁甲科（Hispidae）， 危害以椰子为主的棕榈科植物，是一种重大危险性外来有害生物。其成虫和幼虫均取食棕榈科植株未展开的心叶表皮组织，形成与叶脉平行的狭长褐色条斑，心叶展开后呈大型褐色坏死条斑[1]，严重时导致植株大面积死亡，以杀虫剂为主的化学防治仍是当前主要的应急防控措施之一。金涛等[2]报道了东南亚地区的椰心叶甲大部分已对高效氯氰菊酯和阿维菌素产生了抗药性。

杀虫剂的毒力与害虫本身（特别是不同虫态中的卵和蛹）的生物学特性有密切关系。黄建国等[3]报道了不同仓库害虫的成、幼虫对磷化氢气体较为敏感，而卵和蛹则最不敏感。杀虫剂以特定的途径进入靶标体内，通过干扰和破坏其正常的生长发育控制害虫，害虫的不同发育阶段，将会带来生理生化的差异，在药剂防治过程中表现为敏感性的差异[4]。郝蕙……