Abstract

Two species of chrysomelid leaf beetles found in Brazil, Diabrotica speciosa and Cerotoma arcuata, are strongly attracted to the root of Ceratosanthes hilariana (Cucurbitaceae). Root extracts stimulate a compulsive feeding response. The major feeding stimulants isolated from these extracts were cucurbitacin B and its 23, 24-dihydro derivative.

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