摘要
对套袋梨果主要害虫———中国梨木虱入袋消长规律与为害特点进行了系统的调查。结果表明 ,其入袋消长的始、盛、末期分别在 5月中旬、6月上中旬、8月中旬至 9月中旬 ;入袋后对果面为害造成的斑点出现始盛期分别在 5月下旬和 6月下旬至 7月上中旬。套袋与不套袋相比 ,该虫入袋上果的时间提前 1 0～ 1 9d ;虫量平均增加 1 3倍 ;由为害叶变成为害梨果的主要害虫之一。该虫对套袋梨果的为害途径除直接为害外又增加了间接为害 。
A detailed study on the damaged characters and dyn am ic rules of Psylla chinensis of bagged Ya pear was carried out . The result showed that the beginni ng, the middle and the ptelophase periods for the P. chinensis into bags were separately at the middle of May, early June and from middle August to middle S eptember;the damage spots on the fruits separately appears at the late of May, late June and early June. Campared to the aoked fruits, the intrusion time was 1 0～19 days earlier;the population is 13 times higher;the P chine nsis become one of the most important fruits pest from a leaf pest. Ap art from direct damages to the fruit, the P chinensis can also cause indire ct damages to the pear fruit, and the symtons were changed observably.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2003年第3期89-92,共4页
Journal of Hebei Agricultural University
