Oviposition Stimulants for the Lesser Mulberry Pyralid, Glyphodes pyloalis (WALKER), in Mulberry Leaves : Rediscovery of Phytoalexin Components as Insect Kairomones(Organic Chemistry)

概要

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The oviposition simulant for the lesser mulberry pyralid, Glyphodes pyloalis WALKER, was isolated form an acetone extract of mulberry (Morus alba L.) leaves, and its structure was identified as 2-(3',5'-dihydroxy-4'-prenylphenyl)-6-hydroxybenzofuran, viz. moracin C (1), a known phytoalexin from fungus-infected mulberry shoot. Moracin N (2) and ω-hydroxy moracin N (3) were also identified in the extract, but no ovipositional activity was demonstrated in these compounds. Synthetic moracin M, 2-(3',5'-dihydroxyphenyl)-6-hydroxybenzofuran (4), as the basic skeleton of moracins, indicated weak activity as an oviposition stimulant. The increase in susceptibility of already-infested mulberry leaf is discussed in relation to the production of phytoalexins. All these compounds except ω-hydroxy moracin N (3) are known as phytoalexins in the mulberry tree.
社団法人日本農芸化学会の論文
1991-05-23