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|Section3= }} Hydroxydanaidal is an insect pheromone synthesized by some species of moth from pyrrolizidine alkaloids found in their diet. == Use by insects == The caterpillars of several kinds of arctiid moth ingest pyrrolizidine alkaloids - substances which plants produce to deter herbivores - and use them as protection against insectivores. The larva converts the alkaloid into an ''N''-oxide for storage; on metamorphosis, the alkaloid is retained and used by the adult. This was discovered after the observation that ''Utetheisa ornatrix'' moths caught in spider-webs were cut loose by the spider. Many insects that carry pyrrolizidine alkaloids are brightly-colored to signal their toxicity. Male tiger moths convert the alkaloid through various intermediate stages into the pheromone hydroxydanaidal; female moth prefer males with more pheromone, since the alkaloid will be transferred by the male into her eggs and will protect them from predation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hydroxydanaidal」の詳細全文を読む スポンサード リンク
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