关键词: 梨冠网蝽; 生物学特性; 种群消长规律

Abstract: 【Objective】 The aim of this project is to study the main biological characteristics and occurrence regularity of Stephanotis nashi in Shihezi in the hope of providing basis for scientific prevention and control.【Method】Fixed-point and systematical investigation was carried out to determine the biological characteristics and occurrence regularity by indoor feeding of the insects, observation and photography of their morphological features. 【Result】Four generations of S. nashi could be found in Shihezi area: overwinter adults emerged in mid-April on pear trees when leaves began to germinate, and the first generation of nymphs appeared in late May. And when they were living in large groups, they would consume a lot of food, so the fourth and fifth nymphs alternated leaves to feeding. After June the generations overlapped, the hazard summit period was from the end of July to August. In late October, adults began to look for winter sites for overwintering (second and third generation field population fastigium).【Conclusion】The occurrence regularity of S. nashi in Shihezi was clarified: four generations in one year's time. The periods to control overwinter adults and the first generation nymphs were crucial to the controlling work.

Key words: Stephanitis naski; biological characteristics; occurrence regularity