Abstract
The insecticidal efficacy of the diatomaceous earth formulation DiatoSec® (Ediafilt Diatomite Mining and Processing Ltd., Hungary) against the granary weevil, Sitophilus granarius (Coleoptera: Curculionidae), was evaluated on maize and barley grain in laboratory tests. The diatomaceous earth formulation was applied at three doses of 1, 2 and 4 g kg-1of both grain types. Mortality of S. granarius adults was estimated after 24 and 48 h and 7, 14 and 21 d of exposure on treated grain. After the 21 d counts, all the exposed adults were removed and progeny production on treated grains was assessed 45 days later.
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