HOST PLANT DISCRIMINATION WITHIN CRUCIFERAE: FEEDING RESPONSES OF FOUR LEAF BEETLES (COLEOPTERA: CHRYSOMELIDAE) TO GLUCOSINOLATES, CUCURBITACINS AND CARDENOLIDES
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Antibiotic and nonpreference mechanisms are related in cucumber through the action of the bi gene and the absence of cucurbitacins. Cucurbitacins attract cucumber beetles and cause feeding whereas they have an antibiotic effect on two-spotted mites.