Abstract
The spruce bark beetle, Ips typographus (L.), is one of the most serious pests for Eurasain spruce. Norway spruce, Picea abies (L.) Karst, is the usual host tree. Under normal conditions, the beetles breed in the subcortical tissue of very weak trees or trees broken or overthrown by wind. Thus, such breeding accelerates the natural decay of such trees. Healthy trees are killed only when the beetle population is high and many beetles attack simultaneously. During the last 10 years there has been a rapid growth in the population of I. typographus in Scandinavia. The bark beetles have become a real threat to spruce trees in south-east Norway and west-central Sweden. Several factors have caused this situation to occur. Since 1969 rainfall has been lower than average over large areas of Scandinavia.
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© 1981 Plenum Press, New York
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Lie, R., Bakke, A. (1981). Practical Results from the Mass Trapping of IPS Typographus in Scandinavia. In: Mitchell, E.R. (eds) Management of Insect Pests with Semiochemicals. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3216-9_15
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DOI: https://doi.org/10.1007/978-1-4613-3216-9_15
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