假眼小绿叶蝉的天敌蜘蛛种类及其物种多样性研究

INVESTIGATION AND SPECIES DIVERSITY OF SPIDERS AS NATURAL ENEMIES OF EMPOASCA VITIS G■THE IN TEA FIELD

本文报道了假眼小绿叶蝉的天敌蜘蛛种类，共计２０科８０种，三个生境的物种丰富度指数ＤＭＡ的取值范围在１６．８３３４－１８．２６５７之间，多样性指数Ｈ的范围１．９６２７－２．００５０；均匀度指数Ｊ为０．４８３４－０．５０２６，根据不同生境物种的相似性系数Ｃ进行系统聚类，３个生境在相似系数０．７９３５的水平时全部聚合在一起，化学农药作用的影响。物种多样性明显减少。

80 species of spiders as natural enemies of Empoasca vitis Gothe beloning t0 20 familieswere collected from tea field. The diversity measurements of spiders in different habitats showed thatvalues of species richness indexes DMA, range from 16. 8334 to 18. 2657, species diverity indexesH'from 1 .9627 to 2.0050, and evenness indexes Jswe from 0.4834 to 0. 5026. Based on similaritycoefficients C three habitats can be clusteret at the level of 0. 7935 with the systematic clustering.Species diversity will be significantly decreasedby excessive pesticide spray.