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Title: Stellate hairs on leaves of a deciduous shrub Viburnum erosum var. punctatum (Adoxaceae) effectively protect Brevipalpus obovatus (Acari: Tenuipalpidae) eggs from the predator Phytoseius nipponicus (Acari: Phytoseiidae).
Authors: Sudo, Masaaki
Osakabe, Masahiro  kyouindb  KAKEN_id
Author's alias: 須藤, 正彬
刑部, 正博
Keywords: False spider mites
Predator avoidance
Leaf-surface microstructures
Issue Date: Jul-2013
Publisher: Springer Netherlands
Journal title: Experimental & applied acarology
Volume: 60
Issue: 3
Start page: 299
End page: 311
Abstract: The eggs of the herbivorous false spider mite Brevipalpus obovatus Donnadieu have a longer incubation period than those of spider mites and are not protected by webs. Brevipalpus obovatus often lays its eggs in the gaps among the hairs on host leaves. We examined the effects of stellate hairs of Viburnum erosum var. punctatum (VEP) leaves on the survival of B. obovatus eggs. Adult B. obovatus and Phytoseius nipponicus Ehara, a generalist predator, were introduced to VEP leaf disks; each B. obovatus egg was inspected daily until hatching. More eggs (63 vs. 42 %) survived on the abaxial surfaces of VEP leaves, where the stellate hairs are more complicated, than on the adaxial surfaces. Predation hazard decreased rapidly with increasing egg age and a substantial portion of the eggs hatched. Phytoseius nipponicus preyed on eggs regardless of egg age when mixed-age eggs were provided. Manipulative experiments with bent stellate hairs showed that the normal hairs reduced the predation risk of B. obovatus eggs by P. nipponicus. Therefore, the predation hazard was considered to decrease since the stellate hairs hindered the search for B. obovatus eggs by the phytoseiid mite.
Rights: The final publication is available at Springer via http://dx.doi.org/10.1007/s10493-012-9648-4
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/189850
DOI(Published Version): 10.1007/s10493-012-9648-4
PubMed ID: 23400449
Appears in Collections:Journal Articles

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