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Effects of neem ( Azadirachta indica ) kernel water extracts on cassava mealybug, Phenacoccus manihoti (Hom., Pseudococcidae)
Author(s) -
Mourier M.
Publication year - 1997
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1997.tb01398.x
Subject(s) - mealybug , biology , azadirachta , instar , horticulture , botany , meliaceae , toxicology , pest analysis , larva
The 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.