Skip to Main Content
Survival of the oak wilt fungus in logs fumigated with sulfuryl fluoride and methyl bromideAuthor(s): Anna Yang; Kendhl Seabright; Jennifer Juzwik; Scott W. Myers; Adam Taylor
Source: Forest Products Journal. 69(10): 87-95.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: View PDF (418.0 KB)
DescriptionMethyl bromide (MB) fumigation of oak (Quercus sp.) logs destined for export is required to mitigate risks associated with movement of the oak wilt fungus, Bretziella fagacearum. Alternative fumigants with efficacy against B. fagacearum are needed because of MB's ozone-depleting properties. Fumigation with sulfuryl fluoride (SF) is considered a promising substitute. Logs (1.8 m long) were obtained from Quercus trees (18.3 to 29.2 cm diameter at breast height) that were naturally infested (NI) or artificially inoculated (AI) with B. fagacearum to compare pathogen colonization and survival following fumigation with SF and MB. The logs were fumigated with SF for 72 hours with 240, 280, and 320 g/m3 or 96 hours with 128 and 240 g/m3. MB fumigations were conducted using the current treatment schedule for oak logs destined for export (240 g/m3 for 72 h). Frequencies of successful pathogen isolation before treatment were higher for AI logs than for NI logs based on isolation rates from sapwood chips. Treatments greatly reduced frequencies of viable pathogen presence, but no treatment was successful in eradicating the pathogen. Experiments were conducted on blocks (10.2 by 10.2 by 11.4 cm3) obtained from Quercus trees to investigate simulated penetration and diffusion of SF and MB into oak logs. Slow, variable fumigant diffusion never reached concentration ×time products lethal to B. fagacearum. Based on these results, reliance on SF alone as a quarantine measure may require higher concentration 3 time products to achieve quarantine level control of the oak wilt fungus in logs.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationYang, Anna; Seabright, Kendhl; Juzwik, Jennifer; Myers, Scott W.; Taylor, Adam. 2019. Survival of the oak wilt fungus in logs fumigated with sulfuryl fluoride and methyl bromide. Forest Products Journal. 69(10): 87-95.
- Acquisition of Ophiostoma quercus and Ceratocystis fagacearum by nitidulids from O. quercus-colonized oak wilt mats
- Draft genome sequence of the fungus associated with oak-wilt mortality in South Korea, Raffaelea quercus-mongolicae KACC44405
- A review of oak wilt management: a summary of treatment options and their efficacy
XML: View XML