《昆虫知识》1976年第三期上报道的尖翅小卷蛾Bactra lancealana(Hubner)在本地一年发生十代。我们对照该文及当年的气象资料进行分析研究,认为当年也不可能发生十代,而是发生七代。 经1979—1981年连续在3点6处系统调查,又进一步证实该虫在本地一年发生七代。理由如下: Bactra lancealana (Hubner), a member of Insect Knowledge, reported in the third issue of 1976, occurs ten times a year in the country. According to the analysis of the article and the meteorological data of the year, we think that it is impossible for the ten generation to occur in that year, but rather for seven generations. After a series of systematic investigations at 3: 6 in 1979-1981, it was further confirmed that the pest occurred in the local area for seven generations a year. The reasons are as follows: