取食加拿大一枝黄花的白条银纹夜蛾生物学特性及食性研究

Biological Characteristics and Feeding Habit of Argyrogramma albostriata Feeding on Solidago Canadensis

中国首次发现白条银纹夜蛾(Argyrogramma albostriata Bremeret Grey)幼虫大量取食加拿大一枝黄花(Solidago canadensis),本研究重点为确定该虫寄主范围。野外采集该虫幼虫,试验室饲养、观察与鉴定,确定其生活史;调查发现地以及合肥其他加拿大一枝黄花分布区的植物,并饲喂其6科13种代表植物,进行寄主专一性研究。人工饲喂该虫加拿大一枝黄花,该虫可单独依赖其正常完成生活史,新一代幼虫也能继续取食;调查及食性研究表明,合肥地区该虫的寄主植物全为菊科植物,分别为:马兰(Kalimeris indica)、小飞蓬(Conyza canadesis)、一年蓬(Erigeron annuus)、钻叶紫菀(Aster subulatus)、加拿大一枝黄花;以上5种植物同时存在时,该虫优先取食加拿大一枝黄花。加拿大一枝黄花已成为该虫寄主的稳定组成部分;该虫在本地原寄主均为杂草,其食性条件有利于加拿大一枝黄花的防治。

Larvae of Argyrogramma albostriata Bremeret Grey feeding on Solidago canadensis were found in China,this research was to determine the host range of insect.Insect larvae collected in the field were fed,observed,identified and ascertained the life history in the laboratory.The author investigated the plants in sites where insects were found and other areal area of S.canadensis in Hefei.Host range tests with 13 representative plant species from 6 families.Artificially feeding them S.canadensis,they could complete their life history only on S.canadensis,new generation of larvae also could feed on it.Surveys and feeding habits studies showed that their host plants were all in compositae：such as Kalimeris indica,Conyza canadesis,Erigeron annuus,Aster subulatus and S.canadensis.When above 5 species of plant existed simultaneously,S.c anadensis were eaten preferentially.S.canadensis had become the constant part of host range ofA rgyrogramma albostriata Bremeret Grey.Their primary host was weeds,it’s advantageous to the prevention and control of S.canadensis.