Czech J. Food Sci., 2015, 33(2):174-179 | DOI: 10.17221/303/2014-CJFS

Validation of hydrogen cyanide fumigation in flourmills to control the confused flour beetleFood Technology and Economy, Engineering and Physical Properties

Radek AULICKY1, Vaclav STEJSKAL1, Milan DLOUHY2, Jana LISKOVA2
1 Department of Stored Pest Control and Food Safety, Division of Crop Management System, Crop Research Institute, Prague, Czech Republic
2 Lucebni zavody Draslovka a.s. Kolín, Czech Republic

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

Published: April 30, 2015  Show citation

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AULICKY R, STEJSKAL V, DLOUHY M, LISKOVA J. Validation of hydrogen cyanide fumigation in flourmills to control the confused flour beetle. Czech J. Food Sci. 2015;33(2):174-179. doi: 10.17221/303/2014-CJFS.
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