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Considerations on the cause of conifer damage in plantations attributed to the Scleroderris canker
Author(s) -
Pomerleau René
Publication year - 1971
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1971.tb00294.x
Subject(s) - canker , biology , fungus , range (aeronautics) , red pine , pinus <genus> , geography , horticulture , botany , engineering , aerospace engineering
From observations, made in Quebec, in red pine, jack pine and white pine plantations, evidence is provided showing that extensive damage, noticed in 1967, was directly caused by summer frosts during the most critical growth period, as had been demonstrated 20 years before in another plantation in the same area. Similar losses recorded and studied in Canada and in the Northeastern United States, since 1935 appear, in most cases, to be the result of the same unfavourable conditions and not due to the primary attack of Scleroderris lagerbergii Gremmen that should be considered a saprophyte or a secondary parasite on any dead or dying pine branches and stem lesions. Although a disease, attributed to the same fungus in Europe, on pines planted outside their natural range, exhibited different symptoms, its etiology is also questioned.