【摘要】 本文采用海绵水盘法研究了山楂叶螨TetranychusviennensisZacher的滞育与温度、光照和寄主营养等环境因子的关系。结果表明 2 1℃下 ,临界光周期为 12h 32min ,光敏感螨态为幼螨至第二若螨之间的连续两个螨态 ,单独一个发育阶段对短光照不敏感或仅有微弱的感应。在相同寄主 (梨树 )叶片上 ,病叶和老叶诱导的滞育率比嫩叶高 ,分别为 6 9 7%、 5 5 3%和 2 0 %。相同叶片 ,短光照 (12 5h d)条件下随螨密度的增大滞育率升高。相同短光照下 ,低温促进滞育 ,在 15℃、 18℃和 2 1℃下滞育率分别为 10 0 %、 93 1%和 6 6 7% ;高温 (2 4℃ )抑制滞育 ,滞育率仅为 13 3% ;温度为 2 7℃时不滞育。更多还原

【Abstract】 The effects of environmental factors such as photoperiod temperature and food quality on the incidence of diapause in the hawthorn spider mite, Tetranychus viennensis Zacher were investigated. The results show that the critical photoperiod for inducton of diapause was 12 hours and 32 minutes. The stages from larva to the protonymph, or from protonymph to the deutonymph, were more sensitive to photoperiod than other stages, however, among these a single developmental stage could not induce diapause. Feeding on the same host plants, the diapause incidence on old, diseased and young leaves were 69 7%, 55 3% and 20% respectively. Short photophase and low temperature (15℃, 18℃, 21℃) enhanced the incidence of diapause (100%, 93 1% and 66 7% respectively). Higher temperature (24℃) inhibited diapause,and diapause did not occur at 27℃.更多还原