sdu faculty of forestry journal special edition 2009 - Orman Fakültesi

SDÜ ORMAN FAKÜLTESİ DERGİSİ
Figure 2: In1998, the quarantine zone for Scleroderris canker, European race, was
extended to all areas east of Route #202, a natural barrier for the Avalon Peninsula.
Following this extension of the disease, the quarantine zone was extended in
1998 to all areas east of Route #202, a natural barrier for the Avalon Peninsula
(Figure 2). Unfortunately, no public information or pamphlet was given or
produced
After these new findings, the senior author did a search of historical data on the
Back River Nursery, to have information on the provenance of seed or seedlings in
this nursery and the location of plantations established with seedlings produced in
this nursery. A report on Reforestation in Newfoundland, from 1937 to 1952,
summarized the establishment and activities of the Back River Nursery (Doyle,
1967). It gives details of planting stocks produced, and identified 16 plantations
established on the Avalon, Burin and Bonavista Peninsulas between 1938 and
1951. This report indicated also that all stocks at the Back River Nursery were
produced from seeds: white spruce (Picea glauca (Moench) Voss), white pine
(Pinus strobus L.) and balsam fir (Abies balsamea (L.) P.Mill.) were of local origin
while Norway spruce (Picea abies (L.) Karst.), red pine, Scots pine and jack pine
came from Ontario, Canada. It is important to note that Scleroderris canker cannot
be transmitted by seed. Another report provided a detailed historical account of the
Back River Nursery (Baker and Miller-Pitt, 1998). In 1939 the Newfoundland
Forestry Division received a gift of 30,000 seedlings of red, white, jack and Scots
pines from the Province of Ontario, Canada.
With this information on hand, a survey of localized plantations was done in 1998.
The 16 plantations established with Back River Nursery stock, revealed that most
plantations were in very poor condition, but Scleroderris canker EU race was present in
a number of them. The majority of red pine had died but the disease was still present
and viable in the surviving Scots and jack pines which show resistance to the disease
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