Abstract
The predation on egg populations ofSitona hispidus (Fabricius) [Col.: Curculionidae] in a stand of alfalfa was evaluated in 1982 and 1983. By using pitfall traps, catches of reproductive adults ofS. hispidulus were correlated with catches of carabid species, and potential egg predators were identified for further evaluation. Results indicated that predators removed 28 % of eggs under field conditions.Amara aenea DeGeer was found to be particularly efficient on eggs ofS. hispidulus under caged-field conditions.
Résumé
L'effet sur les populations deSitona hispidulus (F.) [Col.: Curculionidae] causé par la prédation des œufs a été évalué dans des champs de luzerne en 1982 et 1983. L'abondance des adultes reproducteurs deS. hispidulus est en corrélation avec l'abondance des espèces de carabides capturées au moyen de pièges-fosse. Des prèdateurs potentiels des œufs ont aussi été identifiés pour une évaluation ultérieure. Les résultats indiquent que 359 des 1280 œufs (28 %) ont été enlevés par les prédateurs. Une espèce de carabide,Amara aenea DeGeer, s'est avérée un prédateur particulièrement efficace dans les expériences sous cage, sur le terrain.
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Quinn, M.A., Hower, A.A. Predation of eggs ofSitona hispidulus [Col.: Curculionidae] in alfalfa. Entomophaga 32, 3–8 (1987). https://doi.org/10.1007/BF02390925
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DOI: https://doi.org/10.1007/BF02390925