Comparative Effects Of Deltamethrin And Neem Kernel Solution Treatments On Diamondback Moth And Cotesia Plutellae (Hym., Braconidae) Parasitoid Populations In The Cotonou Peri-Urban Area In Benin

A comparison between deltamethrin and Neem kernel solution treatments on Plutella xylostella (L.) populations was made in the Cotonou peri-urban area. Diamondback moth populations were 10 times larger in deltamethrin plots, than in Neem plots after treatment. The number of marketable cabbages from Neem-treated plots was 1.5 times greater than the number from deltamethrin-treated plots. There was no apparent effect of either treatments on Cotesia plutellae (Kurdjumov) populations, the only parasitoid of the pest that was present in the area. (Résumé d'auteur