Effect of Spinosad Towards Insect Pests of Stored Products, Lasioderma serricorne F. and Tribolium confusum DuVal.

Lasioderma serricorne, is mainly a pest of tobacco, but could damage other stored products as well, and the flour beetle; Tribolium confusum, occurs generally in processed food grains between other commodities. Nine concentrations of spinosad, 50,100, 250, 400,550,700,850,1000 and 1200 ppm were used for bioassay. Concerning L.serricorne, LC₅₀, was 609.34 mg(ai/L) after 24h and diminished to 272.5 mg(ai/L) after 72h of exposure and for T. confusum, LC₅₀, was 343.05mg(ai/L) after 24 h and decreased to 182.92 mg(ai/L), after 72 h, of exposure.