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鲁西地区的农田蝗区,涉及数县,除微山湖和东平湖外,其余均属低洼农田。蝗虫发生的主要特点是面积零散,龄期杂乱,为害时间长,防治困难。本文所指的农田蝗区,着重为肥城、东平、平阴等县。常年降雨量500-600毫米,拔海高度2-4.4公尺的低洼地区,全年降雨量约40-70%集中在7月中旬至8月中旬,即从7月份进入汛期至9月份解除汛期。根据1950-1963年十余年的资料观察,汛期严重的时候,也是秋蝗发生和为害的紧急关头。每年自5月上旬开始,发
Luxian area farmland locust area, involving several counties, except Weishan Lake and Dongping Lake, the rest are low-lying farmland. The main features of locusts are scattered area, age clutter, damage for a long time, prevention and treatment difficulties. This refers to the farmland locust area, focusing on Feicheng, Dongping, Pingyin counties. Perennial rainfall of 500-600 mm, pull the height of 2-4.4 meters low-lying areas, the annual rainfall of about 40-70% concentrated in mid-July to mid-August, from July into the flood season to September to lift the flood season . According to data from 1950 to 1963, more than ten years of observation, when the flood season is serious, it is also an urgent juncture for the occurrence and damage of autumn locusts. Starting from the beginning of May every year, hair