套袋梨园中国梨木虱发生特点及防治技术研究

对套袋梨园中国梨木虱的发生特点及防治技术进行了详尽研究。结果表明，该虫人袋的始、盛、末期分别在5月中旬、6月上中旬和8月中旬至9月中旬；套袋的与不套袋的相比，人袋上果时间提前10～19d；虫量平均增加13倍；由为害叶片变成为害套袋果实的主要害虫之一；增加了间接为害途径，且为害症状有显著变化。提出了防治适期和物理、农业、化学的防治措施。

Research on the Occurrence Character and Control Technology of Psylla Chinensis in Bagging Pear Orchard

A detailed research on occurrence character and control technology of PsyUa chinensis in bagging pear orchard was carried out. The result showed that the beginning, blooming and last stage for the P. chinensis into bags were separately at the middle of May, early June and from middle August to middle September;Campared to the aoked fruits, the intrusion time was 10- 19 d earlier;the population was 13 times higher;the Psylla chinensis become one of the most important fruits pest from a leaf pest. the P. chinensis increased indirect damages to the pear fruit, and the symptoms were changed observably. Suitable prevention time and controlling measure were proposed on physics, agriculture, chemistry.