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稻纵卷叶螟Cnaphalocrcis medinalis(Guenee)在我省原仅局部偶发为害,不足为患。七十年代以后,发生面积不断扩大,大发生频次增加,发生程度日趋严重,已成为我省稻作主要害虫之一,1981～83年全省平均每年发生面积达240万亩,占水稻总面积的20％左右,如不及时防治,每年因该虫损失稻谷可达0.7～1.4亿斤。为了更好地研究稻纵卷叶螟在我省的发生规律,开展经济有效的防治,根据联合攻关的精神,于1981年4月正式成立贵州省稻纵卷叶螟联合测报组(简称联测组)。三年来的协作研究,基本明确了该虫在我省的分布状况和地区性
Cnaphalocrcis medinalis (Guenee) in the province was only a local sporadic damage, not enough. Since the seventies, the area of occurrence has been expanding, the frequency of occurrence has increased, the degree of occurrence has become more and more serious. It has become one of the major pests of rice production in our province. From 1981 to 1983, the average annual area of the province reached 2.4 million mu, accounting for the total rice area Of the 20% or so, if not timely control, the annual loss of paddy due to the insects up to 0.7 to 1.4 billion kg. In order to better study the occurrence of rice leaf roller in our province to carry out economic and effective prevention and control, according to the spirit of joint research, in April 1981 formally established the Guizhou Province rice leaf roller combination test report (referred to as the test group). Three years of collaborative research, the basic clear that the pest distribution and regional in our province