鳞翅目幼虫诱导性取食偏好

Induced feeding preference of Lepidopteron caterpillars

鳞翅目幼虫诱导性取食偏好是对此前取食过的食物类型的偏好性或者食物接受度逐渐增强的现象。诱导性取食偏好通常会造成幼虫味觉系统、嗅觉系统和触觉系统的改变。本文讨论了可能导致诱导性偏好过程的几个生理学机制,包括对拒食剂的习惯化,对异生素处理能力增强,特异性正面反应的获得,敏感化和联系性学习;以及取食偏好性的生态意义。诱导性取食偏好是一种适应性反应,使幼虫倾向于在最有利于生长的植物种类上取食。对重要农作物造成显著经济损失、拒食剂应用障碍和化学防治成本上升。因此需要获得推动其取食的基本机制。该现象还可能与寄主选择行为的进化性改变、食谱宽度的变异和寄主种系的进化有关联,然而诱导性取食偏好的物质基础仅在烟草天蛾和菜粉蝶幼虫定性,这两种昆虫已经进化成寡食性的种类,不能从系统发育树的角度弄清食性转变的过程。以后需要在棉铃虫、斜纹夜蛾、海灰翅夜蛾等典型的多食性农业害虫方面进行深入的研究。

Induced feeding preference of Lepidopteron caterpillars is a phenomenon that the type of before feeding food for preferences or gradually enhanced.It could change the Larvae gustatory system,olfactory system,even tactile system.This paper discusses induced feeding preference of some physiological mechanisms process which result this phenomenon in include that antifeedant habituation,the ability of xenobiotic enhancement,the specific positive response acquirement,sensitivity and discontinuity leaning,and feeding preference of ecological significance.Induced feeding preference is a adaptive repence,lead larvae to optimum host live.It can lead significan economic losses for the important crops,hinder the application about antifeedant and rise the cost in chemical prevention.After it is been need to acquire the feeding fundamental mechanism.The phenomenon connected with evolutionary change of the host choice,the variation dietary breadth and host phylad evolutionary.However,it material basis only has been analysis for Manduca sexta and Pieris rapae larvae.The two pests is ologophagy species,we can not make sure the process of feeding change.Need lucubrate about polyphagous agriculture pest Spodoptera littoralis,Spodoptera litura,Helicoverpa armigera etc is great significance important.