农作物重大害虫发生规律研究与“九五”趋势分析

考查我国农作物重大害虫历史发生状况，研究粘虫Mythimna separata Walker、稻飞虱Nilaparvata lugens Sstal稻纵卷叶螟Cnaphalocrocis medinalis Guenee、二化螟Chilo sup pressalis Walker、三化螟Tryporyza incertulas Walker、麦蚜Schizaphis graminum Rondani、玉米螟Ostrinia furnacalis Guenee、棉铃虫Helicoverpar armigera (Hubner)等害虫的长期发生规律，初步发现粘虫、二化螟、稻飞虱、稻纵卷叶螟、玉米螟等长期变化有约16年周 期现象，稻飞虱、三化螟有12年左右周期性规律，二化螟、稻纵卷叶螟、麦蚜、棉铃虫等发生周期约11年。根据害虫规律性作出“九五”期间发展趋势预测。

A STUDY ON REGULAR OCCURRENCE PATFERNS OF IMPORTANTINSCET PESTS OF CROPS AND ANALYSIS OF THEIROCCURRING TRENDS IN 1996---2000

Having studied on long-term regular occurrence patterns of main insect pests oncrops such as Mythimna separata Walker, Nilaparvata lugens StOl, Cnaphalocrocis medihalls Guenee, Chilo suppressalis Walker, Tryporyza incertulas Walker, Schizaphisgraminum Rondani, Ostrinia furnacalis Guenee and Helicoverpar arrnigera Hiibner etc.,it was discovered that the periodicity of pest occurrence for M. separata, C. suppressalis,N. lugens, C. medinalis and O. furnacalis was 16 years approximately. A periodicity of about 12 years also occurred in N. lugens, T. incertulas. An approximately 11 years periodicity for C. suppressalis, C. medinalis, S. graminum and H. armigera was found.A forecast of the trend of the pests for 1996-2000 years is presented.