Trichomes and spider-mite webbing protect predatory mite eggs from intraguild predation
Trichomes and spider-mite webbing protect predatory mite eggs from intraguild predation
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毛状体和蜘蛛螨网保护捕食性螨虫卵免受行会内的捕食
DOI：
10.1007/s004420000462
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发表时间：
2000
期刊：
影响因子：
2.7
通讯作者：
G. English
中科院分区：
文献类型：
--
作者：
A. Roda;J. Nyrop;M. Dicke;G. English
捕食性节肢动物通常在叶被短柔毛或带有虫孔的植物上比在叶无毛的植物上更丰富。我们探讨了这一假设，对于一些捕食螨，这是因为毛提供保护，从intraguild捕食。在实验室实验中，我们测试了苹果叶毛是否保护Typhlodromus pyrieggs免受西方花蓟马Frankliniella oceanentalis的捕食。为了进一步研究毛的影响，我们在无毛叶中加入了棉纤维。我们还确定了二斑叶螨产生的结网是否能保护Persimileseggs免受F.蓟马在T.在田间采集的青春期“欧文鲍尔”苹果叶片上产卵的梨卵显著少于无毛的“克里滕登”苹果叶片。植绥螨卵产卵在棉花纤维被捕食后，显着低于那些无毛豆盘。增加棉花纤维密度从5到20纤维只有轻微进一步减少捕食蓟马对T。我的蛋Thrips fed on significant fewerP.在Te.荨麻疹网比鸡蛋产卵的表面上，不同的只是在没有碲。荨麻疹我们的结论是，一个复杂的叶地形降低了intraguild捕食在这个系统中的强度。
Predaceous arthropods are frequently more abundant on plants with leaves that are pubescent or bear domatia than on plants with glabrous leaves. We explored the hypothesis that for some predatory mites this is because pubescence affords protection from intraguild predation. In laboratory experiments, we tested whether apple leaf pubescence protectedTyphlodromus pyrieggs from predation by western flower thrips,Frankliniella occidentalis.To investigate the effect of pubescence further, we added cotton fibers to trichome-free leaves. We also determined whether webbing produced byTetranychus urticaeprotectedPhytoseiulus persimiliseggs from predation byF. occidentalis.Predation by thrips onT. pyrieggs oviposited on field-collected pubescent "Erwin Bauer" apple leaves was significantly less than on glabrous "Crittenden" apple leaves. Phytoseiid eggs oviposited in the cotton fibers were preyed upon significantly less than those on the trichome-free bean disk. Increasing the cotton fiber density from 5 to 20 fibers only slightly further reduced predation by thrips onT. pyrieggs. Thrips fed upon significantly fewerP. persimiliseggs oviposited inTe. urticaewebbing than eggs oviposited on a surface that differed only in the absence ofTe. urticaeweb. We conclude that a complex leaf topography reduces intensity of intraguild predation in this system.