<i>Vernonia amygdalina</i> and <i>Ocimum gratissimum</i> as grain protectants against Maize Weevil (<i>Sitophilus zeamais</i> Motschulsky)(Coleoptera: Curculionidae)
Abstract:Aqueous leaf extracts of two naturally growing plants inNigeria viz: Vernonia amygdalina and Ocimum gratissimum were admixed with maize grains infested with maize weevil, Sitophilus zeamais Motsch. in the laboratory at 30±3 0 C and 75±2% relative humidity. The plant extracts showed efficiency against the test insect with respect to adult mortality, larval and progeny emergence and percentage grain damage. Adult mortality was highest (88.9%) in maize grains treated with 3% (v/w) of the leaf extracts 3 days post… Show more
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