据各病虫区域站监测,今年华北、西北和东北等地越冬代草地螟成虫发生面积小、密度低,结合各区域气候和寄主生长的适合度,预计今年一代草地螟幼虫总体为偏轻发生,6月下旬至7月上旬为发生盛期,其中新疆和田和阿勒泰、内蒙古中部和东部的局部地区可达中等发生;农田及其周边发生面积约300万亩。一、越冬代成虫发生面积小、密度低 According to the monitoring of the pest and disease regional stations, the occurrences of overwintering generations of grass borer adults in northern China, northwestern and northeastern China occurred this year with small areas and low densities. Based on the suitability of climatic and host growth in each area, it is estimated that the larvae of this generation will generally be overweight From late June to early July, in which some areas of Hetian and Altay in Xinjiang and central and eastern Inner Mongolia reached moderate levels; about 3 million mu occurred in and around the farmland. First, the occurrence of overwintering adult small area, low density