Abstract
This research was conducted to evaluate the insecticidal efficacy of powder of plant materials Piper guineense against fish beetles, Dermestes maculatus. Eight treatments were used in dosages of;0.02g, 0.04g, 0.06g, 0.08g, 0.05g, 1.0g, 1.5g and 2.0g in the research and larval and adult mortalities were monitored in two separate experiments after 24 hours, 48 hours and 72 hours. Piper guineense powder at 2.0g gave mortalities of 83.33% and 76.67% for larva and adult respectively. The percentage of emergence of larva and adult were 15% and 10.7%respectively when the smoked catfish (Clarias gariepinus) was treated with P. guineense powder. Also the percentage of fish loss in Piper guineense powder at 2.0g was 0.88% in adult and larva 1.48%. This research has revealed that the locally available botanicals insecticides could offer effective protection against post-harvest insect pest of fish and therefore could be incorporated into post-harvest fish management strategies.
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