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草地螟是我国北方农作物和牧草的重要害虫。它的发生,具有突然性,常来势猛、虫量大,为害严重。近些年的研究表明,这是由于草地螟进行远距离迁飞的结果。现已查明,山西雁北地区,内蒙乌盟和河北张家口地区部分县为我国草地螟的主要越冬虫源基地。在此基地内每年春季都有数量不等的成虫迁出,到达我国北方繁殖为害。自解放以来,草地螟的发生,已呈现出两个高峰期,第一次为1955年到1959年;第二次为1979年到1983年。目前处于
Meadow borer is an important pest of crops and forage in northern China. Its occurrence, with sudden, often fierce, large amount of insects, serious damage. Recent studies have shown that this is the result of the long-distance flight of the meadow moth. It has been identified that Shanxi Yanbei area, Inner Mongolia and Uygur Autonomous Region and Zhangjiakou, Hebei part of the county for the main stem borer of China overwintering source base. In this base, there are a large number of adults migrating out from spring to spring and reaching the north of our country for reproduction. Since the liberation, the occurrence of Meadow Borer has shown two peaks, the first from 1955 to 1959; the second from 1979 to 1983. Currently at