人纹污灯蛾的虫态及其天敌绒茧蜂研究

人纹污灯蛾在太湖流域桑园内一年发生3代,代次分明,以蛹越冬;人纹污灯蛾幼虫期发生量很大,但基本上为天敌绒茧蜂所控制;第1代幼虫被绒茧蜂寄生率58%～60%,第2代为47%～49%,第3代为28%～29%,致发生量均在防治临界点以下.幼虫食性杂,喜阴暗潮湿,怕阳光.眠期不喜伏于桑叶上,3龄眠起后不再上桑树为害等习性,故人纹污灯蛾是桑园中第一只不需防治的桑叶虫害.

The Studies on the Metamorphosis of Spilarectia subcarnea Walker and its Natural Enemy Apanteles bosrl Bhalenger

Spilarectia subcarnea Walker was occurrence of three generations per year in the mulberry field of Taihu Lake V.alley. It overwintered with its pupae, and the intervals between generations are evident. The larva of which is ultimately controlled by its natural enemy Apanteles boerl Bhalenger that is a kind of larvae parasitic wasp. The parasitism ratio of the first generation was as high as 58%-60%, While the parasitism ratios of second and third generations were 47%-49% and 28%-29% respectively. curing level. The occurring quantity of the larva was below than the economical preventing and Besides, the larva of the .ilarectia subcarnea Walker had a miscellaneous feeding habit, and was fond of shade and aquosity but afraid of light. It did not like stay on the mulberry leaves in molting period, and no longer climbed up to mulberry trees after twice molting and exuviating. Therefore, it was prosposed that Spilarectia subcarnea Walker was a leaf pest that was not needed to prevent and cure in the mulberry field.