Screening of crude plant extracts as feeding deterrents of the wireworm, Melanotus communis |
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Authors: | Michael Villani and Fred Gould |
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Affiliation: | (1) Department of Entomology, North Carolina State University, 27607 Raleigh, NC, USA |
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Abstract: | Extracts from 78 plant species (24 families) were screened for antifeedant activity against the corn wireworm, Melanotus communis Gyll. (Coleoptera: Elateridae). Five extracts from four families significantly reduced wireworm feeding damage in a series of choice feeding tests. Two extracts, Asclepias tuberosa and Hedera helix, exhibited exceptional levels of feeding deterrency. An x-ray technique indicated that wireworms burrowed indiscriminately between soil containing either of these extracts and surrounding untreated soil, but were found more frequently in the untreated areas.
Résumé L'aptitude à empêcher la prise de nourriture de Melanotus communis Gyll. a été recherchée dans les extraits de 78 plantes appartenant à 24 familles. Cinq extraits de 4 familles ont réduit significativement les dégâts alimentaires lorsqu'il y avait choix alimentaire. Deux extraits — Asclepias tuberosa et Hedera helix — présentaient des niveaux exception-nellement élevés de dissuasion de l'alimentation. Une technique aux rayons X a montré que les taupins fouillaient indistinctement le sol contenant de ces extraits ou le sol avoisinant non traité, mais on les recontrait plus fréquemment dans le sol non traité. |
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Keywords: | feeding deterrent corn wireworm Melanotus communis milkweed Asclepias tuberosa |
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