1957年河北、河南、山东等省内涝蝗区,飞蝗发生面积约计1,500余万亩,是解放后几年来比较严重的一年。密度一般每方丈在10头以上,稠的几百头。由于以往对内涝蝗区飞蝗发生的规律摸得不深不透,并认为飞蝗在内涝蝗区不会经常大发生,不作长期打算,放松了技术传授等一系列的准备工作,以致蝗虫大发生后,治蝗工作被动。虽经党政大力组织领导群 In 1957, waterlogging locust areas in Hebei, Henan and Shandong provinces and migratory locusts occurred in an area of ​​about 1,500 mu, which is a serious year after the liberation. Density generally more than 10 per abbot, thick hundreds. Due to the past, the locust plague locust occurs in the law is not deep and impervious, and that locusts in the waterlogging locust area will not often occur, do not make long-term plans, to relax the technology transfer and a series of preparatory work, so locust large After the occurrence of locust control work passive. Although the party and government vigorously organize the leadership group