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“Top‐dying” of Norway spruce, Picea abies (L.) Karst., with special reference to Rhizosphaera kalkhoffii Bubák IV.
Author(s) -
Diamandis S.
Publication year - 1979
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.1439-0329.1979.tb00665.x
Subject(s) - outbreak , karst , picea abies , physical geography , geography , demography , environmental science , climatology , biology , ecology , archaeology , geology , virology , sociology
The height increment pattern of healthy and diseased Norway spruce over the period 1961–75 was studied to test the association of some climatic factors with height increment reduction and eventually foliar browning. Air temperature during December‐March inclusive, high velocity wind (22‐>34 knots) duration during December‐March incl. and rainfall during May‐August incl. over the same period 1961–75 were examined. It was shown that the last outbreak of “top‐dying” in Scotland started in 1971. A correlation analysis and a stepwise multiple regression analysis were conducted to find possible relationships between annual height increments and climate. Results suggested that the coincidence of extreme values of the three considered climatic factors during the period 1971–75 may be responsible for the sharp decline of height increments in 1971 and severe outbreak of the disease.