Eur. J. Entomol. 109 (1): 135-137, 2012 | DOI: 10.14411/eje.2012.017

Do resistant plants provide an enemy-free space to aphids?

Bruno FRÉCHETTE1,2, Charles VINCENT*,2, Philippe GIORDANENGO3, Yvan PELLETIER4, Éric LUCAS1
1 Université du Québec L Montréal, Département des sciences biologiques, C.P. 8888, Succ. Centre-Ville, Montréal, Qc, H3C 3P8, Canada
2 Centre de Recherche et de Développement en Horticulture, Agriculture et Agro-alimentaire Canada, 430 Boul. Gouin, Saint-Jean-sur-Richelieu, Qc, J3B 3E6, Canada
3 Université de Picardie Jules Verne, Biologie des Plantes et Contrôle des Insectes Ravageurs, 33 rue St Leu, 80039 Amiens cedex 1 , France
4 Potato Research Centre, Agriculture and Agri-Food Canada, P.O. Box 20280, Fredericton, New Brunswick, E3B 4Z7, Canada

An experiment was conducted to compare the predation efficiency of the coccinellids Harmonia axyridis and Coleomegilla maculata on potato plants, Solanum tuberosum, and on a wild aphid-resistant species, Solanum tarijense. Harmonia axyridis females reduced aphid populations more than C. maculata females. Aphid predation by the predators was reduced on S. tarijense compared to S. tuberosum. Coleomegilla maculata spent less time on S. tarijense than on S. tuberosum. Harmonia axyridis spent the same amount of time on both plant species. The plant species did not affect IGP between larvae. Compared to S. tuberosum, the resistant plant offers M. persicae an enemy-free space against both coccinellid predators.

Keywords: Resistant plants, aphids, Coccinellidae, Harmonia axyridis, Coleomegilla maculata, enemy-free space, wild Solanum species, Solanum tarijense

Received: May 6, 2011; Accepted: October 13, 2011; Published: January 3, 2012

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