Abstract] A comparison between deltamethrin and Neem kernel solution treatments on Plutella xylostella "L[# popu! lations was made in the Cotonou peri!urban area[ Diamondback moth populations were 09 times larger in deltamethrin plots\ than in Neem plots after treatment[ The number of marketable cabbages from Neem!treated plots was 0[4 times greater than the number from deltamethrin!treated plots[ There was no apparent e}ect of either treatments on Cotesia plutellae "Kurdjumov# populations\ the only parasitoid of the pest that was present in the area[
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