Differentiation in the ability to utilize Pterostyrax hispida (Ebenales: Styracaceae) among four local populations of the phytophagous ladybird beetle Henosepilachna yasutomii (Coleopter

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• 作者：Naoyuki Fujiyama ; Kazuma Matsumoto ; Norio Kobayashi ; Yuri Ohta and Haruo Katakura
• 关键词：Adult feeding acceptance ; Adult feeding preference ; Host plant selection ; Insect– ; plant relationships ; Larval performance
• 刊名：Population Ecology
• 出版年：2005
• 出版时间：August 2005
• 年：2005
• 卷：47
• 期：2
• 页码：91-98
• 全文大小：298 KB

文摘

The oligophagous ladybird beetle Henosepilachna yasutomii Katakura (Coleoptera: Coccinellidae) shows inter-population differences in its host-use. In this beetle, populations using the deciduous tree Pterostyrax hispida Sieb. et Zucc. (Styracaceae) were recently rediscovered in the Kanto districts of central Honshu, Japan. In the present study, the ability to utilize P. hispida and other host plants was compared among four populations of H. yasutomii occurring on P. hispida and Scopolia japonica Maxim. (Solanaceae), Chelidonium japonicum Thunb. (Papaveraceae), and Solanum tuberosum L. (Solanaceae). As regards the feeding habits of adult beetles, only the populations occurring on P. hispida accepted this plants leaves, which differed distinctly from the feeding habits of the other populations, although the differences among the four populations were not readily apparent with respect to the leaf amounts consumed. The larvae from the populations occurring on P. hispida showed significantly higher survivorship on this plant than did the larvae from the other populations. Considering the host use patterns and the life cycles of beetles under natural conditions, the large abundance of P. hispida leaves throughout the season may have played an important role in selection for the ability to utilize P. hispida observed in the H. yasutomii populations occurring on this woody host.