Évaluation des effets de quatre bio-insecticides (Azadiractine, Bacillus thuringiensis, Spinosad et Sincocine) sur Aphis gossypii (Homoptéra : Aphididés) et de ses ennemis naturels

Abstract

Plant protection user chemical control, which remains the most appropriate mean in the fight against natural enemies, plants peppers infested with a Aphis gossypii are treted with four bio-insecticdes, Azadirachtine, B401, Spinosad and Sincocine with one dose homologue .The observation are realised on 7 dayes, pests ( the aphids) and four natural enemies of these pests which are beetles, hoverflies, parasitoïde, and midges in the adult level. The results revealed that three bio-insecticides (Azadirachtine ,Sincocine and spinosad) cause mortality,naturel enemies (labybirds and horverflies) are weakly sensitive to thres products ; however,parasitoide and midges are very sensitive Also the B401 have not any effect during the results.