Faisal HAFEEZ, Misbah ASHRAF, Waqas WAKIL, Muhammad FAROOQ

Persistence and insecticidal efficacy of a diatomaceous earth formulation, Inert-PMS, in stored wheat grain against Cryptolestes ferrugineus (Stephens), Liposcelis paeta Pearman, Rhyzopertha dominica (F.) and Tribolium castaneum (Herbst)

Öz Experiment was conducted to determine the persistence and insecticidal efficacy of a new enhanced diatomaceous earth, Inert-PMS, in wheat against four stored grain insect pests [Cryptolestes ferrugineus (Stephens), Liposcelis paeta Pearman, Rhyzopertha dominica (F.) and Tribolium castaneum (Herbst)] under the laboratory conditions at 50, 75 and 100 mg/kg, for intervals of 24 h, 4 and 7 d at 28ºC and 65% RH. For persistence, Inert-PMS was applied to stored grain for 0, 30, 60, 90 and 120 d. The results demonstrated that adult mortality was directly proportional to the dose and exposure interval. While the efficacy remained constant up to 60 d, it fell after 90 and 120 d of storage. L. paeta and C. ferrugineus were the most susceptible to Inert-PMS (100% mortality) followed by R. dominica (81%) and T. castaneum (72%) at 75 mg/kg after 4 d. Inert-PMS also suppressed the reproduction at lower dose rates. Inert-PMS is an eco-friendly formulation that not only interferes with the growth and development of stored grain insects but is also cheap and free from ill effects.

Anahtar Kelimeler:

Cryptolestes ferrugineus, Liposcelis paeta, Rhyzopertha dominica, Tribolium castaneum, Inert-PMS, new enhanced diatomaceous earth

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