Control of food and stock pests with sulfuryl fluoride
Abstract
The work is devoted to the search for substitutes for methyl bromide, which was limited in use by the requirements of the Montreal Protocol. The article presents the results of fumigation parameters with sulfuryl fluoride against insect pests. Purpose: Determination of the effectiveness of sulfuryl fluoride against the main insect pests of food and storage at post-embryonic stages under different temperature conditions. Methods. Objects of research. Insect pests Sitophilus granarius L. Acanthosсelides obtectus Say, Oryzaephilus surinamensis L., Ephestia kuehniella Zell. at post-embryonic stages of development.The research material – sulfuryl fluoride.Methods: analytical review of the research topics of domestic and foreign scientists, the current regulatory framework in the field of fumigation; analysis of biologicalcharacteristics of insect pests; experimental – variation of different fumigation parameters (concentration, exposure duration, c (concentration) × t (time) products (CT-products), temperature; mathematical and statistical – with the help of computer mathematical functions built into the Microsoft Excel 2003 program.The results. Sulfuryl fluoride was found to be effective against all pests we tested. 100 percent mortality of the Acanthosсelides obtectus at the postembryonic stages of development was obtained at different temperatures with CT-products from 34.87 to 103.23 g-hr. 100% effectiveness of the Ephestia kuehniella at postembryonic stages of development was obtained at CT-products of 12.84 to 84.61 g-hr., depending on the temperature. 100 percent mortality of the Sitophilus granarius at postembryonic stages of development was obtained at CT-products of 16.41 to 70.26 g-hr., depending on the temperature. 100% effectiveness of sulfuryl fluoride against the Oryzaephilus surinamensis at postembryonic stages of development ranged from 9.57 to 56.06 g-hr., depending on temperature.Conclusions. Postembryonic stages of the studied insect pests were significantly less tolerant to fumigant than the egg stage. Depending on the temperature and pest species, the tolerant of postembryonic stages to fumigant ranged from 7.6 to 22.61 times lower than that of the egg stage.The results obtained indicate the need for further research, in particular, in the direction of establishing optimal periods for repeated fumigations and their effectiveness depending on the species of the pest and the temperature.
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