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Distribution of pine shoot beetle attacks within the crown of Scots pine

Långström, Bo (1980). Distribution of pine shoot beetle attacks within the crown of Scots pine. Uppsala: UNSPECIFIED, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 154

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The seasonal and spatial distribution of pine shoot beetle attacks was studied at Simonstorp in southern Sweden. Scots pine of 15-46 years age and 4-14 m height were felled during the period 1972-1974. Samples of attacked shoots were also collected from standing pines of about 2-3 m height. In 1974, attacks were also counted and labelled individually on preselected pines throughout the growing season. The results indicate a seasonal change in the age distribution of attacked shoots. The average diameter of damaged shoots was about 4.5 mm, ranging from 2 to 6 mm. The spatial distribution of attacks coincided with the distribution of suitable sized shoots, but the attack pattern was modified by the density of attacks per tree. Multiple attacks were frequently observed which indicated a relative shortage of suitable shoots, especially in upper whorls. More than 50 % of all current shoots were affected in upper whorls, whereas a far smaller proportion of the shoots was damaged in lower whorls

Authors/Creators:Långström, Bo
Title:Distribution of pine shoot beetle attacks within the crown of Scots pine
Series Name/Journal:Studia forestalia Suecica
Year of publishing :1980
Number of Pages:25
Place of Publication:Uppsala
Publisher:College of Forestry, Swedish University of Agricultural Sciences
ISBN for printed version:91-38-05588-0
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant and forest protection
Keywords:Scolytidae, Tomicus spp. , Pinus sylvestris L., attack pattern, intensity of attacks
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ID Code:5479
Faculty:S - Faculty of Forest Sciences
Deposited By: Skogsbiblioteket Umeå
Deposited On:29 Oct 2010 00:00
Metadata Last Modified:07 Dec 2015 10:59

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