Diversité spécifique de l’aphidofaune (Homoptera, Aphididae) et de ses ennemis naturels dans deux (02) stations: El-Outaya et Ain Naga (Biskra) sur piment et poivron (Solanacées) sous abris - plastique

Abstract

In the present work, we studied the diversity of the aphid fauna and their natural enemies in two sites in the region of Biskra. In addition to the inventory, we fellow the fluctuation of Aphis gossypii, which installed on the plants of pepper and paprika (Solanacées) grew in greenhouse at the site of El-Outaya. It appears from this study a richness of winged aphids composed of 26 species in El-Outaya and 19 other in Ain Naga. They belong to three (03) in families, the Aphidinae, the Chaitophorinae and the Pterocommatinae. Quantitative analysis of our results prove that the species Aphis gossypii, Rhopalosiphum maidis, Rhopalosiphum padi and Myzus persicae are the most species predominate in both sites. The activity of the winged is very intense in April at El-Outaya, on the other hand at Ain Naga there were two periods of flight, the first in February and the second in April. Inside the greenhouses the evolution of A. gossypii peaked in April. Four predators were identified: two ladybugs, they are Coccinella algerica (Kovar, 1977) and Hippodamia (Adonia) variegate (Goeze, 1777), a Syrphidae: Episyphus baltautus (DeGeer 1776), a Chrysopidae:Chrysoperla carnea (Stephens 1836) and a parasite: Lisiphlebus ambigius.