Abstract
ABSTRACT The insect Myllocerus viridanus in mulberry cultivation (Morus alba) causes significant harm to sericulture industry throughout the year which hampers leaf quality, silkworm rearing, and cocoon production. In this study, the treatment with neem oil (Azadirachta indica) in five different concentrations (1 to 5ml/L) along with mild soap solution (Khadi) to assess the mortality of M. viridanus at laboratory conditions. The lethal concentrations (LC30 – 3.096;LC50 – 3.471; LC90 - 4.589) were determined by spraying of the neem oil solution to adults of M. viridanus. The results showed that neem oil effectively suppressed M. viridanus and that the mortality of M. viridanus increased gradually (34 %, 44 %, 60 %, 78 %, and 100%) over the control as the concentration of neem oil increased.
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