Abstract
Parasitism ofLygus lineolaris (Palisot de Beauvois) eggs by three species ofMymaridae, Anaphes iole Girault,Erythmelus miridiphagus Dozier andPolynema pratensiphagum Walley and one species ofScelionidae, Telenomus sp., was investigated at Ste-Anne-de-Bellevue, Québec. The maximum level of field parasitism ofL. lineolaris eggs by individual species was 15.4, 53.8, 70.0 and 16,7%, respectively.
Parasitoids were retrieved from eggs ofL. lineolaris inserted in stems and branches ofAmaranthus retroflexus L.,Chenopodium album L.,Coronilla varia L.,Rumex obtusifolius L. andSolanum tuberosum L.
Amaranthus retroflexus andS. tuberosum sustained a large population ofL. lineolaris and egg parasitism was high enough to consider it as a potential control factor.
Résumé
Le parasitisme des œufs deLygus lineolaris par trois espèces deMymaridae, Anaphes iole, Erythmelus miridiphagus etPolynema pratensiphagum et une espèce deScelionidae, Telenomus sp. a été observé à Ste-Anne-de-Bellevue, Québec. Le niveau maximal de parasitisme observé au champ pour chaque espèce a été respectivement de 15,4, 53,8, 70,0 et 16,7%.
Les parasitoïdes étaient obtenus d'œufs deL. lineolaris insérés dans des tiges et des branches d'Amaranthus retroflexus, Chenopodium album, Coronilla varia, Rumex obtusifolius etSolanum tuberosum.
A. retroflexus etS. tuberosum portaient une population élevée deL. lineolaris et le parasitisme des œufs était suffisamment élevé pour que l'on puisse considérer qu'il constitue un facteur important de limitation des populations de la punaise.
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Sohati, P.H., Boivin, G. & Stewart, R.K. Parasitism ofLygus lineolaris eggs onCoronilla varia, solanum tuberosum, and three host weeds in southeastern Québec. Entomophaga 37, 515–523 (1992). https://doi.org/10.1007/BF02372321
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DOI: https://doi.org/10.1007/BF02372321