摘要： 十年研究结果表明;山楂叶螨(Tetranychus viennensis Zacher)在河北省苹果、梨、桃园内的种群自3月底出蛰后逐渐增多,6月份增长迅猛,很快达到高峰.高峰出现的时间及其种群密度与越冬量、温湿度和树势等多种因素密切相关.因此在果树同一物侯期内,同一年的不同果园或同一果园的不同年份种群密度不同.山楂叶螨消长规律和关于三种果树危害的研究结果为其防治指标的研究和制定新的防治措施提供了理论依据.

关键词: 山楂叶螨, 种群消长, 苹果, 梨, 桃

Abstract: The result of the research which lasted ten years indicated the rule of the growth and decline of Tetranychus viennensis Zacher in apple, pear and peach orchards in Hebei Province. The insect population increases gradually after waking at the end of March, and in June reahces peak quickly and then declines rapidly. There is only one peak all the year. The time of appearing peak and the density of the insect population are related with a lot of factors, such as the winter survival of the insect, temperature and humidity , and tree vigor, etc. Therefore, the insect population density is different at the same phenological period. The research result will provide theoretical basis to study the control index of Tetranychus viennensis Zacher and draw up new control methods.

Key words: Tetranychus viennensis Zacher, Insect population density, Apple tree, Pear tree, Peach tree