2016 Fiscal Year Final Research Report
Mechanisms of outbreak and range expansion of the coconut beetle
| Project/Area Number |
26850031
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plant protection science
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Research Collaborator |
Takasu Keiji
Tuda Midori
Furuya Naruto
Imamura Yuya
Kim Sangwan
Tashiro Kosuke
Iiyama Kazuhiro
Nakamura Satoshi
Ichiki Ryoko
Tavares Matias
Gusmao Marcal
Amaral Acacio
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 侵入種 / invasive species / 系統 / clade / 生物的防除 / biological control / 共生者 / symbiont |
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| Outline of Final Research Achievements |
The coconut beetle is a serious pest of coconut palm which contains two clades, the Asian and the Pacific. We investigated the damage potential on coconut palm and range expansion of the two clades in East Timor, where both clades are present. Our results indicated that range expansion and outbreaks have occurred for the Asian clade alone. The Asian clade attacked trees taller than 10 m, whereas the Pacific clade seldom attacked these trees. The preference for the taller trees, which are more abundant, can facilitate range expansion and outbreaks of the Asian clade. Beetles of the different clades mate each other but produced eggs seldom hatch. We found that a novel clade of alphaproteobacterial endosymbionts induces this phenomenon.
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| Free Research Field |
昆虫生態学
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