Research Article

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

  1. Lise S Hansen1,*,
  2. Peer Hansen2,
  3. Karl-Martin V Jensen1

Article first published online: 5 MAY 2012

DOI: 10.1002/ps.3304

Issue

Pest Management Science

Pest Management Science

Volume 68, Issue 9, pages 1311–1316, September 2012

Additional Information

How to Cite

Hansen, L. S., Hansen, P. and Jensen, K.-M. V. (2012), Lethal doses of ozone for control of all stages of internal and external feeders in stored products. Pest. Manag. Sci., 68: 1311–1316. doi: 10.1002/ps.3304

Author Information

  1. 1

    Department of Agroecology, Aarhus University, Slagelse, Denmark

  2. 2

    Crop-Protector KS, Copenhagen, Denmark

*Department of Agroecology, Aarhus University, Research Centre Flakkebjerg, DK-4200 Slagelse, Denmark.

Publication History

  1. Issue published online: 7 AUG 2012
  2. Article first published online: 5 MAY 2012
  3. Accepted manuscript online: 15 FEB 2012 06:52AM EST
  4. Manuscript Accepted: 15 FEB 2012
  5. Manuscript Revised: 29 NOV 2011
  6. Manuscript Received: 23 SEP 2011

Funded by

  • Danish Ministry of Food
  • Agriculture and Fisheries
  • Aarhus University and Crop-Protector KS

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Keywords:

  • ozonation;
  • lethal doses;
  • stored-product pests;
  • grain stores;
  • internal feeders;
  • pest control

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. Copyright © 2012 Society of Chemical Industry

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