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Effect Of Five Diatomaceous Earth Formulations Against Tribolium Castaneum (Coleoptera: Tenebrionidae), Oryzaephilus Surinamensis (Coleoptera: Silvanidae) And Rhyzopertha Dominica (Coleoptera: Bostrychidae), Adel Khashaveh
Adel Khashaveh
Laboratory bioassays were conducted to determine the effect of food source on the survival of Tribolium castaneum Herbst, Oryzaephilus surinamensis L. and Rhyzopertha dominica F., after exposure to five diatomaceous earth (DE) formulations: Protect-It®, Insecto®, Perma-GuardTM, Dryacide® and SilicoSec®. Adults of these species were exposed to DEs at the rate of 0.5 mg/cm2 for 1 day on filter paper inside plastic Petri dishes. After exposure, the initial mortality was counted and live individuals of the three species were held for a week in glass vials containing 50 mg wheat flour, rice and whole wheat, respectively. In the second experiment, after …