Diabroticite Beetle Responses to Cucurbitacin Kairomones in Cucurbita Hybrids1

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<jats:title>Abstract</jats:title> <jats:p>Two hybrid cucurbits were produced that combined the genetic production of cucurbitacins as found in the wild bitter gourds, <jats:italic>Cucurbita andreana</jats:italic> Naud and <jats:italic>C. texana</jats:italic> Gray, with the high fruit yields characteristic of the domesticated cultivars of <jats:italic>C. maxima</jats:italic> Duchesne and <jats:italic>C. pepo</jats:italic> L. Both the C. <jats:italic>andreana</jats:italic> × <jats:italic>C. maxima</jats:italic> and <jats:italic>C. texana</jats:italic> × <jats:italic>C. pepo</jats:italic> hybrids produced relatively high yields of fruit with high cucurbitacin content. Both hybrids showed promise as attractants for population estimation of corn rootworm beetles (<jats:italic>Diabrotica undecimpunctata howardi</jats:italic> Barber and <jats:italic>D. virgifera</jats:italic> LeConte) or for use in poisoned baits using methomyl or trichlorfon with the bitter cut fruits or fruit homogenates.</jats:p>

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