EFFICACY OF A NEW AMORPHOUS SILICA DUST, (DRYACIDE), AGAINST Tribolium Confusum DUV. (COLEOPTERA: CURCULIONIDAE) INFESTING STOREDWHEAT GRAINS

Document Type : Original Article

Authors

Girls College, Riyadh, Saudi Arabia

Abstract

Amphorphous silica dust (Oryacide) was used to control adults of Tribolium
confusum at concentrations of 200, 400, 800, and 1000 IJ 9 silica dust I 9 wheat. Adult
of tribolium confusum were placed in the three classes 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 IJ gIg w. seed germination was not affected by
treatment by silica dust.
Journal of Plant Protection and Pathology
Volume 29, Issue 7
July 2004
Pages 4185-4195

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