D-Catechin: An Oviposition Stimulant of Azuki Bean Weevil <i>Callosobruchus chinensis</i> in the Host Azuki Bean

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  • D-カテキン-小豆に含まれるアズキゾウムシの産卵刺激物質
  • D-カテキン--小豆に含まれるアズキゾウムシの産卵刺激物質〔英文〕
  • D カテキン アズキ ニ フクマレル アズキゾウムシ ノ サンラン シゲキ ブ

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An oviposition stimulant of the azuki bean weevil Callosobruchus chinensis was isolated from aqueous extracts of its host, the azuki bean Vigna angularis. The kairomone was identified as D-catechin, (2S, 3S)-3, 5, 7, 3′, 4′-pentahydroxyflavan. It was active at 0.2-2ng per glass bead and was located only in the seed coat. A bean (average weight 136mg) contained 17.6μg of the compound. The fact that the purified D-catechin fraction was somewhat more active than commercially available D-catechin suggested the presence of other components of the kairomone or its synergist.

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