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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

Abstract

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.

Keywords

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

Zusammenfassung

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.

Notes

Acknowledgements

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

References

  1. Avramidis S, Liu F, Neilson BJ (1994) Radio-frequency/vacuum drying of softwoods: drying of thick western redcedar with constant electrode voltage. For Prod J 44(1):41–47 Google Scholar
  2. Baker AC (1939) The basis for treatment of products where fruit flies are involved as a condition for entry into the United States. US Department of Agriculture Circular No 551 Google Scholar
  3. Bergdahl DR (1988) Impact of pinewood nematode in North America: present and future. J Nematol 20:260–265 PubMedGoogle Scholar
  4. Dwinell LD (1997) The pine wood nematode: regulation and mitigation. Annu Rev Phytopathol 35:153–166 PubMedCrossRefGoogle Scholar
  5. Food and Agriculture Organization (FAO) of the United Nations (2002) Guidelines for regulating wood packaging material in international trade. Inter Standards for Phytosanitary Measures No 13 (ISPM 15). FAO of the United Nations, Rome, 14 p Google Scholar
  6. Hoover K, Uzunovic A, Gething B, Dale A, Leung K, Ostiguy N, Janowiak JJ (2010) Lethal temperature for pinewood nematode, Bursaphelenchus xylophilus, in infested wood using microwave energy. J Nematol (submitted for publication) Google Scholar
  7. Lazarescu C, Plattner A, Hart F, Breuil C, Avramidis S (2009) Pasteurization of Hemlock by radio frequency heating: a preliminary study. For Prod J 59(4):79–83 Google Scholar
  8. Mamiya Y (1983) Pathology of the pine wilt disease caused by Bursaphelenchus xylophilus. Annu Rev Phytopathol 21:201–220 CrossRefGoogle Scholar
  9. Mota MM, Braasch H, Bravo MA, Penas AC, Burgermeister W, Metge K, Sousa E (1999) First report of Bursaphelenchus xylophilus in Portugal and in Europe. Nematology 1:727–734 CrossRefGoogle Scholar
  10. Nelson SO (1978) Frequency and moisture dependence of the dielectric properties of high-moisture corn. J Microw Power 13(2):213–218 Google Scholar
  11. Takasu F (2009) Individual-based modeling of the spread of pine wilt disease: vector beetle dispersal and the Allee effect. Popul Ecol 51(3):399–409 CrossRefGoogle Scholar
  12. Torovnikov GI (1993) Dielectric properties of wood and wood-based materials. Springer, Berlin, 196 p Google Scholar
  13. Tzean SS, Tang JS (1985) The occurrence of the pine wood nematode, Bursaphelenchus xylophilus, in Taiwan. In: Proc ROC symp electron microsc, 6th, pp 38–39 Google Scholar
  14. Wingfield MJ, Blanchette RA, Nicholls TH, Robbins K (1982) The pine wood nematode: a comparison of the situation in the United States and Japan. Can J For Res 12(1):71–75 CrossRefGoogle Scholar
  15. Yang B, Qouli W (1989) Distribution of the pinewood nematode in China and susceptibility of some Chinese and exotic pines to the nematode. Can J For Res 19:1527–1530 CrossRefGoogle Scholar
  16. Yi C, Park J, Chang K (1989) Occurrence of pine wood nematode, Bursaphelenchus xylophilus (Steiner et. Buhrer) Nickle, and its vector, Monochamus alternatus Hope, in Korea. In: Proc IUFRO reg workshop for insect pests and tree dis NE Asia. For Prod Res Inst, Tsukuba, Jpn, pp 183–193 Google Scholar

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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