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据我省8个市、地,21个县、区,38个社、场,共115份调查资料分析,今年一代玉米螟将是中等偏重发生年,部分地区将大发生,其依据如下:1.越冬基数今年玉米螟越冬虫量,大部分地区略低于大发生的1979年,部分地区越冬虫量较大.沈阳、鞍山越冬虫量较高,百秆活虫量(下同)分别为109.42头及102.5头,其次是铁岭地
According to the survey data of 115 cities in 8 cities, prefectures, 21 districts, 38 communities and fields in our province, the generation of corn borer will be moderately severe in this year and will occur in some areas. The basis is as follows: 1 Overwintering base The amount of overwintering insect population of the corn borer in this year was slightly lower than that of the large-scale occurrence in most areas in 1979 and the number of overwintering pests in some areas was relatively large. The overwintering pests in Shenyang and Anshan were higher and the quantities of living insects per 100 stems were 109.42 heads and 102.5 heads, followed by Tieling