东亚飞蝗(Locusta migratoria manilensis Meyen)发生基地多在我国东部黄、淮河下游的沿海、滨湖及河泛地区,均为海拔较低的易涝之地。关于西北地区飞蝗的报告很少。1968—1971年飞蝗在陕西省关中东部三门峡库区曾猖獗发生,食害玉米、高粱及小麦。据省上统计,1970年秋残蝗食害麦田达8,000亩,其中毁苗重播的近 Locusta migratoria manilensis Meyen occurs mostly in coastal areas of Yellow River and Huai River in the east of China, and lakeside and river flooding areas, all of which are low waterlogging land. There are few reports of migratory locusts in the northwest region. 1968-1971 migratory locust occurred in the Sanmenxia reservoir area in the eastern part of Guanzhong, Shaanxi Province, where it consumed corn, sorghum and wheat. According to the statistics of the province, in autumn 1970, locusts consumed 8,000 acres of harvested wheat fields, of which the destroyed seedlings were replayed