The effect of shading in tea garden on population dynamics of small green leafhopper (SGL ) was investigated for their eggs , nymphae and adults with plant-flapping and microscopic examination . The results showed that the effect of shading in tea garden was not significant in the population of SGL adults (F=0.836 ,P>0.05) but significant on their nymph (F=8.04 ,P<0.01) and egg density (F=7.183 ,P<0.05) .The shading in tea garden might delay the impairing of small green leafhopper migration without changing on their occurrence regulation .The population dynamics of small green leafhopper had two peaks annually .The population of SGL adults was significantly positive correlation to its populations in the nymphae and eggs .%采用田间拍盘和采梢镜检的方法，研究遮荫对茶园小绿叶蝉成虫、若虫的数量及茶梢内叶蝉着卵量的影响。结果表明，遮荫对茶园小绿叶蝉成虫的影响不显著（ F＝0.836， P＞0.05），对若虫的影响极显著（ F＝8.04， P＜0.01），对叶蝉茶梢内着卵量的影响显著（ F＝7.183， P＜0.05）。田间种植遮荫树可以推迟小绿叶蝉危害的时间，没有改变叶蝉整体的发生规律，遮荫与对照茶园叶蝉的发生都分别有2个高峰期，成虫的发生动态与对应的若虫、茶梢内叶蝉着卵量都呈显著的正相关。
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