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一、贺县稻苞虫种类分布的比例据去年6—9月份观察,稻苞虫的一字纹、小苞虫和隐纹等三种弄蝶在贺县发生的比例为:一字纹占19.5%,小苞虫占56%,隐纹占24.6%;成灾世代的上一代弄蝶所占的比例:在6月隐纹最盛,这时占总数的50.9%;7月小苞虫最盛,占总数的52.2%,8月一字纹最盛,占总数的45.9%。田间成灾时幼虫的比例:隐纹6月发生最盛,占总
First, the hebei rice shell insects species distribution ratio According to last year, 6-9 months of observation, the rice shell insects of the word pattern, small insects and hidden lines and other three kinds of butterflies in He County, the proportion of occurrence: a pattern accounted for 19.5%, Scabies accounted for 56%, hidden lines accounted for 24.6%; the generation of the previous generations of Morpho occurred in the proportion of the proportion: the most impotence in June, then accounted for 50.9% of the total; Accounting for 52.2% of the total. In August, the number of characters was the highest, accounting for 45.9% of the total. Proportion of larvae in field disaster: Implosion peaked in June, accounting for the total