Lethal doses of ozone for control of all stages of internal and external feeders in stored products

Pest Management Science
Lise S HansenKarl-Martin V Jensen

Abstract

Gaseous ozone (O(3)) has potential for control of insects in stored grain. Previous studies have focused on freely exposed insects. Immatures of internal pests (e.g. Sitophilus spp. and most stages of Rhyzopertha dominica F.) are protected within kernels and probably require higher doses and/or longer treatment times for full control. A laboratory study determined the doses of ozone necessary for full control of freely exposed and internal stages of eleven stored-product pest species. Test insects were three species of Sitophilus, R. dominica, Tribolium confusum Jacquelin du Val, T. castaneum Herbst, Plodia interpunctella Hübner, Sitotroga cerealella Olivier, Oryzaephilus surinamensis L., Ephestia kuehniella Zeller and Stegobium paniceum L. Insects were exposed to continuous flows of ozone in doses of 10-135 ppm and exposure times of 5-8 days. Dose-mortality bioassays were conducted on three species of Sitophilus and P. interpunctella. Freely exposed stages (with a few exceptions) were controlled with 35 ppm of ozone for 6 days. Full mortality of internal stages within kernels required exposure to 135 ppm for 8 days. This study confirms that higher doses and/or longer treatment times are necessary for control of internal stages...Continue Reading

References

Jul 21, 2001·Journal of Stored Products Research·S A. KellsC P. Woloshuk
Sep 10, 2009·Annual Review of Entomology·Thomas W Phillips, James E Throne
Mar 17, 2011·Journal of Economic Entomology·E L BonjourR L Beeby

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Citations

Oct 23, 2019·Insects·Darija LemicIvana Pajač Živković
Nov 28, 2017·Journal of Economic Entomology·Rizana M MahroofJewel Wrighton
Jun 12, 2021·Food Research International·Ranjna SirohiAshok Pandey

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