Abstract
AbstractThe effect of neem kernel water extract (NKWE) in different concentrations on cassava mealybug, Phenacoccus manihoti, was investigated. A choice‐test showed that neem treated cassava leaves were less attractive to first instar mealybugs than untreated leaves. Mealybugs that started feeding on treated leaves died in their second instar. A greenhouse experiment showed that three applications of NKWE at weekly intervals protected cassava against established early instar mealybugs. There were no significant differences between concentrations of 1, 10 and 25%. All concentrations were phytotoxic to a varying degree.
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