Study of aphid species (Hemiptera:Aphididae) dependent on potato cultivation and inventory of their natural enemies in northern Algeria (Staoueli)


I. Slimani* and S. Fekkoun

Our study aims to identify the aphid species capable of colonizing the potato crop. The trapping techniques used are yellow basins and hand picking. This study shows a specific richness of 16 species belonging to two sub-families, namely the Aphidinae and the Pemphiginae. The results of the hand harvest showed that the species Aphis nasturtii is the most represented species with a relative abundance of 31.03%. Trapping of winged aphids showed that the species Aphis gossypii is the best represented with a relative abundance of 34.23%. The study of the evolution of aphid species according to the phenological stages of the potato has brought out four species, namely Aphis fabae, Aphis frangulae, Aulacorthum solani and Macrosiphum euphorbiae which seem to be the most subservient and which mark their presence from the start of the establishment of the culture. The inventory of natural enemies of aphids shows the presence of four predatory species and eight parasitoid species. The predators are Coccinella septempunctata, which is found to be the most abundant with a relative abundance of 48.57%, Hippodamia variegata, Scymnus subvillosus and Chrysoperla carnea. For the parasitoids, the species Aphidius sp is the most represented with a relative abundance of 24.76%.

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