Repellency of Ethanolic Extract of Some Indigenous Plants Against Tribolium confusum (du val))(Coleoptera: Tenebrionidae)

Abstract

Repellency of ethanolic extracts of five plants extract viz. Eucalyptus gluaca, Melia azedarach, Mentha arvensis, Olea europaea leaves and pericarp of Punica granatum was tested against adult and larvae of the confused flour beetle Tribolium confusum using a choice test with treated filter paper. The plant extracts were applied at four concentrations which (2.5%, 5%, 7.5% and 10%) for each adult and larvae. All the plant extracts were found to be effective repellents and showed more than 20 % average repellency. The M.arvensis extract had potent repellent activity against T. confusum adults with 100 % repellency values with 2.5% concentration at 1h of exposure time for adult stage, while for larval stage it was observed that E. glauaca induce 100% repellency with concentration 7.5% at 2h after exposure. These naturally occurring plant extracts could be useful to protect the grains from the damages caused by of T.confusum. Keywords: Repellency, Tribolium confusum, plants extract, Indigenous Plants.