Leaf hairs influence searching efficiency and predation rate of the predatory mite Phytoseiulus persimilis (Acari: Phytoseiidae)
Leaf hairs influence searching efficiency and predation rate of the predatory mite Phytoseiulus persimilis (Acari: Phytoseiidae)
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DOI：
10.1023/a:1006098410165
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发表时间：
1999-02-01
影响因子：
2.2
通讯作者：
Dicke, M
中科院分区：
文献类型：
--
作者：
Krips, OE;Kleijn, PW;Dicke, M
研究了叶毛对杨梅雌成虫搜寻效率的影响。为了达到这个目的，我们以观赏作物非洲菊为研究对象，测定了捕食者在三种不同品种上的搜索效率，这三种品种的叶片下表面的叶毛密度差别很大。在叶毛密度最低的品种上，螨的行走速度最高。行走活动，定义为行走时间的百分比，不依赖于叶片毛密度的品种。在两种猎物密度测试中，第一次捕食的时间随着叶毛密度的增加而增加。成雌persimilis的捕食率受毛状体密度的影响，特别是在猎物密度较低时。在叶毛密度为1.3和2.5个叶叶螨卵cm（-2）时，捕食率与叶毛密度呈负相关。在8.0卵cm（-2）时，叶毛密度对捕食率无显著影响。在低猎物密度条件下，这些不利的影响对小麦黑穗病螨的搜索效率和捕食成功率的影响表明，叶毛可能阻碍了小麦黑穗病螨对非洲菊的生物防治。应用学报23:119-131 (C) 1999。
The effect of leaf hairs on searching efficiency of adult female Phytoseiulus persimilis was investigated. For this purpose we used the ornamental crop Gerbera jamesonii and determined the predator's searching efficiency on three cultivars that differ largely in the density of leaf hairs on the undersurface of the leaves. Walking speed of the mites was highest on the cultivar with the lowest leaf hair density. Walking activity, defined as the percentage of time spent walking, was not dependent on leaf hair density of the cultivars. At both prey densities tested, time until first predation increased with leaf hair density. The predation rate of adult female P. persimilis is affected by trichome density, particularly when prey density is low. At prey densities of 1.3 and 2.5 Tetranychus urticae eggs cm(-2), predation rate was inversely related to leaf hair density. At a prey density of 8.0 eggs cm(-2) no significant effect of leaf hair density on predation rate was found. These negative effects on searching efficiency and predation success at low prey density of P. persimilis suggest that biological control of T. urticae on gerbera may be hampered by leaf hairs. Exp Appl Acarol 23: 119-131 (C) 1999 Kluwer Academic Publishers.