Canadian Forest Service Publications
Outbreak of Scleroderris canker, European race, in Central Newfoundland: escape from quarantine. 2009. Warren, G.R.; Laflamme, G. SDU Faculty of Forestry J. Special Issue Serial A: 33-38.
Issued by: Laurentian Forestry Centre
Catalog ID: 31079
Availability: PDF (request by e-mail)
Scleroderris canker, European race, was first detected on Austrian pine in St. John's, Newfoundland in 1979. To prevent spread of this exotic disease, a quarantine zone was established in 1980 to all areas north of the Witless Bay Line. Later, red pine mortality near Torbay (1981), Upper Island Cove and along Salmonier Line (1996) resulted in extending the quarantine zone in 1998 to all areas east of Route #202 at the isthmus of the Avalon Peninsula. Infection on these pines was tracked back to planting stock produced at the Back River Nursery on Salmonier Line. These seedlings were planted on the Avalon and Bonavista Peninsulas from 1937 to 1952. Until 2007, the slow rate of spread and natural quarantine boundary limited this disease for over 60 years to the Avalon Peninsula. In 2007, the European race of Scleroderris canker was detected in an isolated red pine plantation in central Newfoundland at Berry Hill Pond, 400 km outside of the quarantine zone. Field observations showed that conducive conditions for the pathogen were always present in the area, explaining rapid development of the epidemic compared to slow progression in plantation on the Avalon Peninsula. Failure to publicize and enforce the quarantine and apply preventative control measures has now resulted in threats to native red pine stands and plantations established throughout central Nfld. Pruning red pines in that region will prevent any new outbreak. We cannot rely on quarantine measures alone to prevent spread of this disease.