草地螟是近年来才引起注意的害虫,国内有关该虫的资料不多,详细的发生规律也正在研究中,因此目前还不可能订出一套完整的预测预报办法。兹根据几年来的初步观察,提出几点意见。为了指导防治和积累资料,以作今后预测工作的参考,建议各地预测预报机构可先进行成虫和幼虫的调查,至于卵和田间越冬幼虫的调查工作,似可暂缓进行。草地螟在内蒙、山西、河北、吉林、青海等省区,每年主要发生两代,部分地区可能发生3代。一般以第1代虫口密度为最高,第2和第3代往往发生不多,为害不显著。陕西武功地区,据西北农科所观察,可能发生3—4代。在每年主要发生两代的地区,第1代成虫始见于5月中下旬,6月为羽化盛期;第 Grasshopper is a pest that attracted attention in recent years. There is not much information about the pest in China and detailed rules of occurrence are under study. Therefore, it is impossible to formulate a complete set of forecasting methods at present. Based on a few years of preliminary observation, I have made a few comments. In order to guide the prevention and control of the accumulation of data for future reference, it is recommended that the prediction and forecasting agencies in all regions carry out surveys on adults and larvae. The investigation of overwintering larvae in eggs and fields seems to be suspended. Meadow borers in Inner Mongolia, Shanxi, Hebei, Jilin, Qinghai and other provinces and autonomous regions, the main occurrence of two generations each year, in some areas may occur three generations. Generally the first generation of insect population density as the highest, the second and third generation tend to occur much, damage is not significant. Shaanxi Wugong area, according to Northwest Agricultural Observatory, 3-4 generations may occur. In the area where two generations occur each year, the first generation of adults first appeared in mid-late May and June was the feathering period.