柑桔全爪螨为害梨树时春夏季种群密度极低但随后却突然爆发 ,形成一年之中只有秋季一个高峰期之发生规律 ,这与其在柑桔上一年之中两个发生高峰期的发生特点形成鲜明对照。为阐明柑桔全爪螨在梨树上的这种季节消长规律之成因 ,本文采用对比研究方法分别研究了该螨在梨叶和柑桔叶一年之中的产卵率 ,成活率以及卵的孵化率等生态学习性。结果表明产卵率在梨叶与柑桔叶之间全年均无显著差异 ;然而其在梨叶上的成活率以及卵的孵化率在八月之前明显低于其在柑桔叶上之值 ,且差异显著或极显著 ,但八月之后以上各项指标在梨叶和柑桔叶上均无显著差异。 Citrus red mite mite harmful pear population when spring and summer population density is very low, but then suddenly broke out, the formation of a year, only one peak in the fall of the law, as in citrus in the year before the peak of two The characteristics of the formation of a sharp contrast. In order to elucidate the causes of this seasonal pattern of the growth of Citrus primate mites on pear trees, comparative studies were conducted in this paper to study the oviposition rate, survival rate, Hatching rate and other ecological habits. The results showed that there was no significant difference in spawning rate between pear leaves and citrus leaves throughout the year; however, its survival rate on pear leaves and hatching rate of eggs before August were significantly lower than those on citrus leaves , And the difference was significant or very significant, but after August, there was no significant difference in the above indexes between pear leaves and citrus leaves.