Efficacy of a new amorphous silica dust, (Dryacide), against Tribolium confusum Duv. (Coleoptera: Curculionidae) infesting stored wheat grains [electronic resource].

Includes references.

Amphorphous silica dust (Dryacide) was used to control adults of Tribolium confusum at concentrations of 200, 400, 800, and 1 000 µ g silica dust / g wheat. Adult of tribolium confusum were placed in the three dasses of wheat grains and incubated at 20 .C and 28 1 .C and 65 ± 5 % R.H. mortality counts were estimated after 48 and 168 hrs. Toxicity increased with concentration and temperature increase. Adults exposed to the dust for 7 days gave progeny in some treated replicates. Silica dust gave high percentages of mortality after long-term storage at the four periods (1,8. 16 and 24 weeks ) at 500 and 1000 V µ g w. seed germination was not affected by treatment by silica dust.

Summary in Arabic.

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