Исследовалось влияние смоляного рака (возбудители - Cronartium flaccidum (Alb. et Schw.) Wint. и Peridermium pini (Willd) Lev. et. Kleb.) на морфологию побегов и семенную продуктивность макростробилов деревьев сосны обыкновенной. У больных деревьев наблюдается уменьшение биометрических показателей побегов и хвои, снижение семенной продуктивности макростробилов.
The researches carried out in Krasnoyarsk Priangarie are shown that the resin top disease of Scots pine trees caused by fungi (the host-alternating fungus Cronartium flaccidum (Alb. et Schw.) Wint. and Peridermium pini (Willd) Lev. et. Kleb.) occurred in average 34,8% of trees. Affected trees are characterized by decreasing of shoots and needle biometric parameters and seed productivity of macrostrobiles. The decreasing growth of shoots was (10.8-17.7% in different plots) and needle (8.7- 21.4% in different plots) in affected trees. At the same time the damage of needle increased up to 42.9%. The seed productivity of macrostrobiles of affected trees was reduced up to 34.2%. However, seed germinating power was not differ in healthy and affected trees. The sizes and seed productivity of macrostrobiles intimately correlated with vegetative organs parameters (up to 0.83) in both categories of trees. Seed output was negatively correlated with shoot diameter, needle width and seed scale numbers. The complex character of observed disturbances gives evidence productivity decreasing in affected trees.