Évaluation des effets de quatre bio-insecticides (Azadirachtine, Sincocin, Spinosad, Bacillus thuringiensis) sur Aphis gossypii et ses complexes parasitaires.

Abstract

Phytosanitary protection uses chemical control, which remains the most adequate means in the fight against crop enemies, the pepper plants infested by the aphid Aphis gossypiis are treated with four bio-insecticide products Azadirachtin (neem azal), Sincocin (Sincocin AG), Spinosad (TRACER 240 SC), Bacillus thuringiensis (B410) with an approved dose for each product. The treatments lasted 6 days, against pests (Aphids) and four natural enemies of these pests which are Ladybirds, Syrphids, Parasitoids at the adult stage and midge larvae. The three bio-insecticidal products (Azadirachtin, Sincocine, Spinosad) faced a mortality of individuals from the first days, on the other hand, the bio-insecticide Bacillus thuringiensis did not give good results, Ladybugs and Syrphes (the natural enemies ) are weakly sensitive to all three products, on the other hand, parasitoids and midge are very sensitive.