Bio-efficacy of medicinal leaf powders against drug store beetle, Stegobium paniceum Linn. (Coleoptera: Anobiidae) infesting coriander seeds

Bio-efficacy of leaf powders of medicinal plants viz., Andrographis paniculata Wall., Azadiracta indicia A. Juss., Eucalyptus globules Labill. and Vitex negundo L. was evaluated for their efficacy against adult drugstore beetle, Stegobium paniceum Linn. on coriander seeds under laboratory conditions at Annamalai University, India. Observations were recorded at 12 h interval up to 84 h after treatment. Two percent concentration of all leaf powders showed mortality effect on test insect. Azadiracta indica leaf powder 2 % concentration inflicted cent per cent mortality at 84 hours after treatment. This was followed by A. paniculata 2 %, A. indica 1%, V. negundo 2%, E. globules 2%, A. paniculata 1 %,E. globules 1% and V. negundo 1%.