Host plant iridoid-based chemical defense of an aphid,Acyrthosiphon nipponicus,against ladybird beetles |
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| Authors: | Ritsuo Nishida Hiroshi Fukami |
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| Affiliation: | (1) Pesticide Research Institute faculty of Agriculture, Kyoto University, Sakyo-ku, 606 Kyoto, Japan |
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| Abstract: | A Rubiaceae-feeding aphid,Acyrthosiphon nipponicus, is seldom attacked by the ladybird beetle,Harmonia axyridis. A potent deterrent against the beetle was isolated from the aphid and identified as paederoside, an iridoid glycoside originating in the aphid's host,Paederia scandens. The iridoid content was as high as 2% of the intact body weight, and a large portion was found in the cornicle secretion. |
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| Keywords: | Defense deterrent sequestration iridoid glycoside paederoside Acyrthosiphon nipponicus Homoptera aphid Aphididae Harmonia axyridis Coleoptera Coccinellidae Paederia scandens |
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