李实蜂在河北地区发生特点的研究

１９９８、１９９９年在易县解村要场、西陵林场、中独乐村，对 蜂的发生特点进行了调查和研究。结果表明，李实蜂在河北易县４月初为羽化高蜂，和李树盛花期相吻合；第１代幼虫于５月下旬脱果。不同品种、树膛内外，李实蜂的为害程度有极显著差异；而不同方向不同高度的为害程度则无明显差异；幼虫的空间分布型为随机分布。根据研究结果和李实蜂发生太，提出在全省李树新品种推广区加强监测和治理的原则建议。

A STUDY ON OCCURENCE OF Hoplocompa sp.IN HEBEI

This paper is about the survey and study results of Hoplocampa sp The study was carried out in Xiecun forest farm, Xiling forest farm and Zhongdule village in 1998 and 1999 Some results in the following aspects were achieved The emergence peak stage of Hpplocampa sp is at the first decade of April in Yixian county,in accordance with full bloom preiod of Prunus saliceina The first generation larvae comes off the fruits by the end of May There is significant difference in damage between plum varieties, inwards spaces and outwards spaces of the tree crown However,no significant difference is found between various heights and directions of the crown The bigger the number of the fruits, the bigger the number of the damaged fruits and the rate of damage The space distribution model of the Hoplocampa larvae is random Based on the results of the survey and the current status of the occurrence ,the enhancement of monitering the insect occurence of the insect in new cultivation districts and the principles of control are suggested