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1997年在兰考县调查了泡桐林内小绿叶蝉Empoascaflavescens(Fabricius)的分布、种群动态及昼夜活动节律。小绿叶蝉集中分布于林冠上部,其分布与林冠高度呈正相关,以黄色诱虫器为例,其相关性分别表现为y=1012.7x-2726.7(R2=0.9971)(黄筒)和y=66.127x1.8462(R2=0.9866)(黄板);种群数量在年生活周期中有3个明显的高峰,即6月上旬、7月下旬、9月上旬。昼夜活动节律在不同月份存在一定的差异,夏季气温高时成虫多在早晨(8∶00)和傍晚(18∶00～20∶00)温度相对较低时活动;秋季则集中在中午(14∶00)温度较高时活动,其它时间为取食和隐匿休息时间。
In 1997, the distribution, population dynamics and circadian rhythms of Empoascaflavescens (Fabricius) in Paulownia forest were investigated in Lankao County. Small green leafhoppers concentrated distribution in the upper part of the canopy, the distribution was positively correlated with the canopy height, yellow trap, for example, the correlation was respectively y = 1012.7x-2726.7 (R2 = 0.9971) (yellow tube) and y = 66.127 x1.8462 (R2 = 0.9866) (yellow plate). There are three distinct peaks in the annual life cycle of the population, that is, early June, late July and early September. There were some differences in circadian rhythms in different months. In summer, adults were more active when the temperature was relatively lower in the morning (8:00) and evening (18:00 ~ 20:00), while in autumn they were concentrated in the afternoon 00) activities at higher temperatures, other times to take and hide the rest time.