Validation of hydrogen cyanide fumigation in flourmills to control the confused flour beetle

Radek Aulicky, Vaclav Stejskal, Milan Dlouhy and Jana Liskova
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Radek Aulicky: Department of Stored Pest Control and Food Safety, Division of Crop Management System, Crop Research Institute, Prague, Czech Republic
Vaclav Stejskal: Department of Stored Pest Control and Food Safety, Division of Crop Management System, Crop Research Institute, Prague, Czech Republic
Milan Dlouhy: Lucebni zavody Draslovka a.s. Kolín, Czech Republic
Jana Liskova: Lucebni zavody Draslovka a.s. Kolín, Czech Republic

Czech Journal of Food Sciences, 2015, vol. 33, issue 2, 174-179

Abstract: In the milling industry, the Tribolium confusum is hard to exterminate pest. We measured the concentration time product (Ct-P) achieved during the hydrogen cyanide (HCN) fumigation and examined whether the Ct-P levels in the explored Czech pilot mill were sufficient to control the field strain of T. confusum. Using an originally constructed, gastight fumigation chamber, it was estimated that the Ct-P required for the complete killing of the field strain of T. confusum was 4× higher (4.35 g/h/m3) than the levels required to kill the laboratory strain (1.25 g/h/m3). The Ct-P levels (ranging from 79 g/h/m3 to 100 g/h/m3) reached during the mill fumigations with HCN were less than half of the labelled HCN rate (240 g/h/m3). Nevertheless, the current HCN dosage is still sufficient since the Ct-P reached during the mill fumigations was at least 99× higher than that required for the exterminating to the lab strain and 18× higher than that required for the field strain extermination. These results were confirmed in mill validation testing, where 100% mortality of T. confusum adults was achieved.

Keywords: mills; food safety; pest control; insecticides; fumigant (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:33:y:2015:i:2:id:303-2014-cjfs

DOI: 10.17221/303/2014-CJFS

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Czech Journal of Food Sciences is currently edited by Ing. Zdeňka Náglová, Ph.D.

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