Abstract
The results of an experimental study of the vertical distribution of Sitophilus oryzae L. adults in a 10-m high wheat grain bulk during storage are described. At the beginning of the experiment, the model grain bulk was infested with beetles at a uniform density of 5 ind. per 1 kg of grain. After 151 and 224 days of storage, live beetles were found only in the surface grain layer down to 0.1 m deep where their densities were 693 and 3943 ind./kg, respectively. At the same time, the densities of dead beetles in the grain bulk decreased considerably with depth.
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Original Russian Text © G.A. Zakladnoy, 2018, published in Entomologicheskoe Obozrenie, 2018, Vol. 97, No. 1, pp. 12—15.
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Zakladnoy, G.A. Vertical Distribution of Adult Rice Weevils, Sitophilus oryzae L. (Coleoptera, Dryophthoridae), in a Stored Grain Bulk. Entmol. Rev. 98, 8–9 (2018). https://doi.org/10.1134/S0013873818010025
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DOI: https://doi.org/10.1134/S0013873818010025