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Field efficacy of brief exposure of adults of six storage pests to nitrogen-controlled atmospheres

Author

Listed:
  • Radek Aulicky

    (Crop Research Institute, Prague, Czech Republic)

  • Vlastimil Kolar

    (Podravka-Lagris, Dolní Lhota u Luhačovic, Czech Republic)

  • Jan Plachy

    (DDD servis s.r.o. Praha, Prague, Czech Republic)

  • Vaclav Stejskal

    (Crop Research Institute, Prague, Czech Republic)

Abstract

The efficacy of a brief exposure (1, 7, and 10 days) to a nitrogen-controlled atmosphere (N-CA) for major storagepests in a field validation study in the Czech Republic is reported. The main goal was to estimate how quickly themobile adult stages of six species of storage beetles (Oryzaephilus surinamensis, Cryptolestes ferrugineus, Triboliumconfusum, Tribolium castaneum, Sitophilus granarius, and Sitophilus oryzae) are killed after introduction of theinfested commodity to prevent their further spread to the surrounding storage bins. The trials were conducted in ametal bin containing 25 t of seeds using the system of continual top-down nitrogen filling to replace the oxygen. Thecomposition of N-CA in the silo was measured continually. The target N-CA concentration (i.e., ≤ 1% O2 and 99% N2)was reached at the bottom of the silo after 12 h of the purging phase of nitrogen silo filling. A one-day exposure toN-CA corresponds to top-down filling, which initially gives higher concentrations of N2 in the upper than in the lowerpart of the silo: low efficacy was reached at the silo bottom (0-33.3%), while higher efficacy (16.7-100%) was reachedat the top of the silo bin. The mortality variation at both locations was species dependent: the most sensitive was O.surinamensis, and the least sensitive were S. granarius and S. oryzae. Seven days of N-CA exposure led to 100% mortalityof all tested species except for S. granarius (96.7% mortality at the bottom), while 10 days of N-CA exposure ledto 100% mortality of all adults located at both the bottom and the top of the silo. This experiment showed that oneday of exposure to N-CA caused significant mortality to reduce the spread of insects from the top of the silo but notfrom the silo bottom, and 10 days of exposure completely prevent the adult mobile pest stages of all tested speciesfrom spreading from the treated silo and causing cross-infestation in the storage facility.

Suggested Citation

  • Radek Aulicky & Vlastimil Kolar & Jan Plachy & Vaclav Stejskal, 2017. "Field efficacy of brief exposure of adults of six storage pests to nitrogen-controlled atmospheres," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 53(3), pages 169-176.
  • Handle: RePEc:caa:jnlpps:v:53:y:2017:i:3:id:136-2016-pps
    DOI: 10.17221/136/2016-PPS
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    References listed on IDEAS

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    1. Zuzana Kučerová & Karel Kýhos & Radek Aulický & Václav Stejskal, 2013. "Low-pressure treatment to control food-infesting pests (Tribolium castaneum, Sitophilus granarius) using a vacuum packing machine," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 31(1), pages 94-98.
    2. Radek AULICKY & Vaclav STEJSKAL, 2015. "Efficacy and limitations of phosphine "spot-fumigation" against five Coleoptera species of stored product pests in wheat in a grain store - short note," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 51(1), pages 33-38.
    3. Radek Aulicky & Vaclav Stejskal & Zuzana KuCerova & Pascale Trematerra, 2016. "Trapping of internal and external feeding stored grain beetle pests with two types of pitfall traps: a two-year field study," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 52(1), pages 45-53.
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