假眼小绿叶蝉及天敌蜘蛛生态位的研究

调查测定了茶园假眼小绿叶蝉与其天敌蜘蛛的生态位。结果表明,在广东英德地区,草间小黑蛛是假眼小绿叶蝉主要的优势天敌种,其次是斜纹猫蛛、机敏蝇豹、警戒蝇豹和黑色蚁蛛;化防园与自然园生态位比较结果表明,假眼小绿叶蝉的生态位宽度值没有大的差异,但化防园蜘蛛的种类比自然园少,假眼小绿叶蝉与蜘蛛的生态位重叠也相当小,不能有效发挥天敌的控制作用。

Studies on the Ecological Niche of Emposca vitis(G(o)the)and Spiders in Tea Gardens

Niche of Emposca vitis (Gthe) and spiders in different tea gardens in Yingde Guangdong was systematically investigated. Results showed that Erigonidium graminicolum (Sundevall) is the main predominance natural enemies, the next is Oxypes Sertatus L.Koch, Jotus difficilis Boes et Str., Jotus munitus Boes et Str.and Myrmarachne innermichelis. Comparing on the niche width of Emposca vitis (Gthe) between chemical control tea gardens and bio-control tea gardens, there is no difference to be found, but the kinds of spiders is less in chemical control tea gardens than bio-control tea gardens, also niche overlap of Emposca vitis (Gthe) and spiders is smaller, which cause the natural enemies can not control Emposca vitis (Gthe).