斜纹夜蛾幼虫不同体位间体色变化规律的初步研究

Primary study of the regulation of Spodoptera Litura larva’s body color change

本试验通过比较采自不同地区、不同寄主上斜纹夜蛾幼虫的体色,并通过室内用不同饲料的饲养,观察记录各幼虫个体不同发育日龄体色变化的过程,研究分析了斜纹夜蛾幼虫个体间以及同一个体不同体位间体色分化的多样性规律。结果表明,斜纹夜蛾幼虫体色在个体间和同一个体不同发育时期以及同一个体不同体位间均具有一定的变异性,且变异主要发生在不同龄期间,不同食料因素也有一定的影响。但各不同体位的色泽在个体间的变异存在着一定程度的稳定性和变异性差异,其中以虫体两侧斜纹以及总体次色和副色的稳定性最好,即在不同个体或不同虫期间均保持着基本一致的色泽不变;而主体,头、胸及腹部主色,背线、亚背线和气门线主色在不同个体或不同虫期间存在着较大的变异性。上述结果,为田间正确识别斜纹夜蛾幼虫种类提供了重要形态学依据。

By comparing this experiment were collected from different regions,different host plants Larval body color,and through the interior with a different feed feeding,observed and recorded at different developmental age of the individual larval body color changing process,research and analysis of the Spodoptera litura larval body color differentiation between individuals diversity of laws.The results showed that larvae of Spodoptera litura body color with variability,and mainly occurs in different age periods,different food factors also have a certain impact.