European Journal of Wood and Wood Products

, Volume 69, Issue 4, pp 573–578 | Cite as

Radio frequency heating pasteurization of pine wood nematode (Bursaphelenchus xylophilus) infected wood

  • Ciprian Lazarescu
  • Angela Dale
  • Adnan Uzunovic
  • Colette Breuil
  • Stavros AvramidisEmail author
Originals Originalarbeiten


The research was aimed to establish whether dielectric heating at radio frequencies (RF)—an alternative method to ozone-depleting methyl bromide fumigation and to convective heating—could bring green lodgepole pine boards infested with pinewood nematodes (PWN) to pasteurization requirements. Artificially infected specimens were treated using a laboratory RF oven and post-treatment nematode survival levels were assessed. Both tested combinations of 56°C/30 min and 60°C/15 min were effective in eradicating PWN. A power density of 50 kW/m3 maintained for 75 minutes fully pasteurized all the tested boards and proved to be the right combination if no temperature sensors are used. The data gathered supports the idea that pasteurization by RF heating is a reliable and swift alternative treatment to fumigation and convective heat treatment.


Methyl Bromide Fiber Saturation Point Pine Wilt Disease Dielectric Loss Factor Pine Wood Nematode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Phytosanitäre Behandlung von mit Kiefernholznematoden (Bursaphelenchus xylophilus) befallenem Holz mittels Hochfrequenzerhitzung


In dieser Studie wurde untersucht, ob mit Hochfrequenzerhitzung (HF), einem alternativen Verfahren zur ozonschädlichen Methylbromid-Begasung und zu konvektiver Hitzebehandlung, die Anforderungen an die Pasteurisierung von mit Kiefernholznematoden (PWN) befallenem frischem Kiefernschnittholz erfüllt werden können. Künstlich infizierte Proben wurden unter Verwendung einer Hochfrequenzeinrichtung behandelt und anschließend wurde die Überlebensrate der Nematoden bestimmt. Sowohl eine Behandlung bei 56 °C/30 min als auch bei 60 °C/15 min erwies sich als zur Abtötung von PWN effektiv. Bei einer Energiedichte von 50 kW/m3 über eine Dauer von 75 Minuten wurden alle Proben vollständig pasteurisiert. Dies erwies sich als richtige Kombination falls keine Temperatursensoren benutzt werden. Die erfassten Daten bestätigen die Annahme, dass Pasteurisierung durch Hochfrequenzerhitzung eine zuverlässige und rasche Behandlungsalternative zur Begasung und traditionellen Hitzebehandlung darstellt.



This work is financially supported by a Strategic Grant from the Natural Sciences and Engineering Research Council of Canada. As part of the work was done through support of staff at FPInovations we also wish to thank Canadian Forest Service that financially supported this work under the Contribution Agreement existing between the Government of Canada and FPInnovations, Division Forintek. The input regarding the experimental design and technical information about the RF-heating by Dr. Terry Enegren is greatly appreciated


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Ciprian Lazarescu
    • 1
  • Angela Dale
    • 2
  • Adnan Uzunovic
    • 2
  • Colette Breuil
    • 1
  • Stavros Avramidis
    • 1
    Email author
  1. 1.Department of Wood ScienceThe University of British ColumbiaVancouverCanada
  2. 2.Forintek DivisionFP InnovationsVancouverCanada

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