一、实验目的草地螟是我区及山西、黑龙江、吉林、辽宁等地发生的一种杂食性、暴发性害虫,主要以一代幼虫为害甜菜、大豆、大麻等农作物以及灰菜、苜蓿等野生植物,造成严重减产。为了正确估计为害损失率,给制定防治指标提供依据,我们于1985年6月11日～7月9日对草地螟幼虫食量进行了测定。 First, the purpose of the experiment Grasshopper is my area and Shanxi, Heilongjiang, Jilin, Liaoning and other places occurred in a omnivorous and fulminant pests, mainly a generation of larvae beet, soybean, cannabis and other crops and gray cabbage, alfalfa and other wild plants , Causing serious cuts. In order to correctly estimate the damage loss rate, to provide a basis for the establishment of control indicators, we measured the larvae ’s food intake on June 11, 1985 to July 9, 1985.