梨小食心虫 Grapholitha molesta(Busck)是一种钻蛀性果树害虫,我们采用的一切害虫管理手段,只有在入梢、蛀果前完成,方能奏效,因此卵和初孵幼虫期是防治的关键时期。在现行的防治方法中,无论人工释放寄生蜂,还是以卵果率0.5—1%为指标的化学防治,都以卵的消长为其重要依据。为此,我们于1979～1982年,对卵及蛀果的田间消长进行了调查研究,并在指导生产中取得了较好的效果。现将有关资料整理于后。 Grapholitha molesta (Busck) is a borer pest, and all the pest management tools we use are effective only when entering the shoots and borers, so the eggs and the newly hatched larval stage are the key to control period. In the current methods of prevention and treatment, either artificial release of parasitic wasps or chemical control based on egg percentage of 0.5-1%, all take the growth and decline of eggs as the important basis. To this end, in 1979 ~ 1982, we conducted a survey on the growth and decline of eggs and borer crops, and achieved good results in guiding the production. The information is now sorted out.