Pii: S0022-474x(98)00043-5
نویسنده
چکیده
Four diatomaceous earth formulations and one calcium carbonate formulation were evaluated in combination with high temperature as a control method for the adult stage of the red ̄our beetle, Tribolium castaneum (Herbst). At 348C, exposure to the insecticidal dusts for 15 or 30 min did not increase mortality relative to beetles not exposed to the dusts. However, at 508C, exposure increased mortality by 8±100%. Exposure to the Protect-It formulation caused greater beetle mortality than exposure to any of the other materials. The calcium carbonate formulation exhibited no insecticidal activity. Withholding food from the beetles after exposure to heat plus diatomaceous earth increased mortality 2±4 times beyond the level for beetles that were not denied food. A combination treatment of heat with an eective diatomaceous earth formulation may be useful for managing this pest in cerealgrain processing facilities. Published by Elsevier Science Ltd.
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Pii: S0022-474x(99)00023-5
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