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期 刊 ：植物保护学报 2007年

关键词：中华草蛉；西花蓟马；捕食功能反应；搜寻效应；

Keywords:Chrysopa sinica, Frankliniella occidentalis, functional response, searching rate,

摘 要 ：中华草蛉是蓟马的重要天敌,为探明其对西花蓟马的控制效能,在室内开展了中华草蛉幼虫对西花蓟马若虫的捕食功能反应与搜寻效应研究。结果表明,在供试温度下,该捕食功能反应符合Holling II型方程。在相同温度下,中华草蛉幼虫的捕食量随着猎物密度的增加而增大,搜寻效应随着猎物密度的增加而降低。在18~26℃范围内,随着温度的升高,中华草蛉幼虫对西花蓟马若虫的捕食量增加,而在26~34℃范围则有相反的趋势。26℃时捕食数量最大,捕食上限达163.9头。在相同猎物密度条件下,捕食作用率与中华草蛉幼虫密度的关系为E=0.3284 P^-0.4467,分摊竞争强度与中华草蛉幼虫密度的关系为I=0.8203 lgP+0.0038。

Abstract:Chrysopa sinica is major natural enemy of thrips. Functional response and searching rate of C.sinica larvae on Frankliniella occidentalis nymphs were studied in laboratory in order to learn the control efficiency of the C.sinica on F.occidentalis. The functional response could be described with Holling II equation within the range of test temperature. At same temperature, the predation capacity of C.sinica larvae on F.occidentalis nymphs increased with the increasing density of F.occidentalis nymphs, while searching rate decreased. Predation capacity of C.sinica larvae increased with the increase of temperature at 18-26℃, however decreased at 26-34℃. At 26℃, predation number was the highest, which was 163.9. At same prey density, the relationship between predation ratio (E) and density of C.sinica larvae (P) was described by equation of E=0.3284 P^-0.4467, and the relationship between intensity of scrambling competition (I) and the density of C.sinica larvae (P) is I=0.8203 lgP+0.0038.

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