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安庆地区水稻螟害,除部份大山区以二化螟为主外,絕大多數稻区均以三化螟为主,其全年发蛾量約占各种螟虫的80—90%以上。以往,因三化螟(主要是第三代)为害,每年損失的稻谷最少有四、五千万斤。最近几年,由于各级党政的高度重視和正确領导,經过广大干部羣众的努力,逐步开展了大面积药剂治螟运动,取得了很大成績。特別是1964年,三化螟特大发生,不仅发生量大,而且发生期早,全区治螟面积共达一百五十万亩以上,占应治面积的70%左右。經过防
In addition, most of the rice areas are dominated by the three rice borers, except for some large mountainous areas. The annual moth population accounts for more than 80-90% of the various stem borers. In the past, as a result of the damage caused by the rice stem borer (mainly the third generation), the annual loss of rice has at least four or five ten million jin. In recent years, thanks to the great importance and correct leadership of party and government at all levels, the masses of cadres and the masses have gradually carried out a large-scale campaign to combat the disease and achieved great success. Especially in 1964, the stem borer occurred in large scale, not only occurred in large quantities, but also occurred early. The area covered a total area of over 1.5 million mu and accounted for about 70% of the area to be treated. After the defense