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玛草蛉Mallada sp.是新入侵危险性害虫螺旋粉虱Aleurodicus dispersus Russell的捕食性天敌。本文在室内开展了玛草蛉幼虫对螺旋粉虱若虫的捕食功能和搜寻效应研究。结果表明:玛草蛉2龄和3龄幼虫对螺旋粉虱若虫的捕食反应均属HollingⅡ型,拟合方程分别为Na=0.8836N/1+0.8836×0.0407N和Na=1.3721N/1+1.3721×10.0134N,理论日最大捕食量分别为24.5700和74.6269。玛草蛉2、3龄幼虫的搜寻效应均随螺旋粉虱若虫的密度增加而降低。
Malvaceae Mallada sp. Is a predatory natural enemy of the newly invasive perennial Aleurodicus dispersus Russell. In this paper, we conducted indoor research on the predation function and search effect of the larvae of Artemisia majus on the nymphs. The results showed that the predation responses of 2nd instar and 3rd instar larvae to N. niloticus were both Holling Ⅱ, and their fitting equations were Na = 0.8836N / 1 + 0.8836 × 0.0407N and Na = 1.3721N / 1 + 1.3721 × 10.0134N, the theoretical maximum daily food intake was 24.5700 and 74.6269 respectively. The search effects of the 2nd and 3rd instar larvae of M. matsudana decreased with the increase of the density of N. tabulaeformis.