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Instar-specific defensive secretions of stink bugs (Heteroptera: Pentatomidae)

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Defensive secretions (allomones) from first-instar nymphs of stink bugs in the subfamily Pentatominae contain (E)-4-oxo-2-decenal as a major constituent, whereas this compound is absent from later instars. In contrast, first instars ofEdessa meditabunda (Edessinae) produce allomones like those of later instars. The C6 and C8 (E)-4-oxo-2-alkenals are common, characteristic exocrine compounds of nymphal and adult Heteroptera, but (E)-4-oxo-2-decenal is previously unknown as a major natural product for which a biological role has yet to be established.

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Borges, M., Aldrich, J.R. Instar-specific defensive secretions of stink bugs (Heteroptera: Pentatomidae). Experientia 48, 893–896 (1992).

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