冀东地区梨小食心虫发生规律研究

Study on Occurrence of Oriental Fruit Moth in Eastern Hebei

利用性诱剂诱集的方法,调查了冀东地区梨园和桃园梨小食心虫成虫的发生规律;并人为制造越冬场所,调查了梨小食心虫在梨树和桃树上的越冬虫态及数量。结果表明：在冀东地区梨小食心虫每年发生有5~6个高峰期,以蛹越冬。该害虫在梨树整个生长季节均有发生,其中4月下旬~9月上旬大量发生,世代有增加的趋势;对梨果实的为害程度有随着果实成熟度的提高而加重的趋势,虫果率为10.8%~45.6%。在桃园前期发生量大,后期有逐渐减少的趋势,尤以6~7月发生较多;梨小食心虫有转梢为害的习性,对桃梢的为害程度随时间的推进而逐渐严重,桃梢为害率达11.78%~85.2%,桃虫果率高达69%,为害十分严重。

The occurrence of oriental fruit moth in Eastern Hebei was studied by using sex attractant trapping.The results showed that the oriental fruit moth had 5-6 peaks.The insect survived through winter in pupa.The insect occurred in the whole growth season of pear,which largely occurred from the last of ten days of April to the first ten days of September.The damage of oriental fruit moth to pear became more severe with fruit ripening,and the percentage of insect-infected fruits was 10.8%-45.6%.The insect largely occurred at early growth stage of peach,and then decreased.The damage of oriental fruit moth to peach shoot was serious gradually,the percentage of insect-infected shoots was 11.78%-85.2% and that of insect-infected fruits was 69%.