Cucurbitacins as kairomones for diabroticite beetles.

  title={Cucurbitacins as kairomones for diabroticite beetles.},
  author={Robert L. Metcalf and Robert A. Metcalf and Ann M. Rhodes},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={77 7},
The characteristic bitter substances of the Cucurbitaceae act as kairomones for a large group of diabroticite beetles (Chrysomelidae, Galerucinae, Luperini), promoting host selection and compulsive feeding behavior. These beetles (e.g., Diabrotica undecimpunctata howardi) respond to as little as 1 ng of cucurbitacin (Cuc) B on thin-layer plates by arrest and compulsive feeding. Six species of diabroticite beetles were about 10 times more responsive to Cuc B than to Cuc E and less responsive to… CONTINUE READING


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