Old and fresh Gremmeniella abietina damage on Scots pine in eastern Lapland in 1992.

Abstract

Damage on Scots pine ( L.) caused by (Lagerb.) Morelet was assessed in the summer of 1992 in 67 stands in eastern Lapland. The area and severity of damage were smaller and lighter than had earlier been estimated and occurred especially in stands in the first-thinning stage or in middle-age. Significant new infection of 1991 occurred in stands previously heavily infected by near Kemihaara river, lake Naruska, the Naruska river, the Tuntsa river and lake Vilma. Fresh damage occurred mainly in the lower or middle parts of the Scots pine canopies. Pinus sylvestrisGremmeniella abietinaG. abietina