Pest Management Science (2012) 68, 1311-1316

Lise S. Hansen, Peer Hansen and Karl-Martin V. Jensen (2012)
Lethal doses of ozone for control of all stages of internal and external feeders in stored products
Pest Management Science 68 (9), 1311-1316
Abstract: BACKGROUND: Gaseous ozone (O₃) 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.
RESULTS: 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.
CONCLUSION: This study confirms that higher doses and/or longer treatment times are necessary for control of internal stages of stored-product pests.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Karl-Martin Vagn Jensen

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tribolium castaneum	Stored grain
	Tribolium confusum	Stored grain
	Plodia interpunctella	Stored grain
	Sitophilus (genus)	Stored grain
	Oryzaephilus surinamensis	Stored grain
	Rhyzopertha dominica	Stored grain
	Stegobium paniceum	Stored grain
	Sitotroga cerealella	Stored grain
	Ephestia kuehniella	Stored grain