Some cenotic features of Scots pine blister rust and red ring rot in pine forests

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Tatarintsev, A I, Melnichenko, N P
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2021
• Subjects: Krasnoyarsk Krai
• Online Access: http://dx.doi.org/10.1088/1755-1315/848/1/012164; https://iopscience.iop.org/article/10.1088/1755-1315/848/1/012164; https://iopscience.iop.org/article/10.1088/1755-1315/848/1/012164/pdf

Abstract Scots pine blister rust and red ring rot are common diseases on Scots pine throughout its entire range. Many specialists have studied these diseases in various aspects. Nevertheless, the cenotic patterns of incidence in pine forests, primarily for Scots pine blister rust, have been studied to a lesser extent. The study is aimed to establish the peculiarities of incidence of Scots pine blister rust and red ring rot in pine forests at the dendrocenosis-level in the context of forest conditions and the biology of pathogens. We studied the pine forests of the Dzerzhinskoe forestry located in the Krasnoyarsk Krai. Research methods included detailed forest pathological examination, macroscopic diagnostics of diseases, determination of indicators proving disease manifestation, and analysis of the series of diameter-related distribution of trees. Scots pine blister rust was proved to be of high injuriousness for trees and entire forest stand in case of hotspot emergency. Red ring rot does not play such a significant role in the plant community since trees with signs of rot retain their activity for a long time as part of the cenopopulation. Diameter-related distribution of the affected trees mainly corresponds to the general stand structure. Nevertheless, in red ring rot hotspots, there is a certain predominance of large specimens in the affected part of the stand, which is associated with a reduced immunity in such trees. Scots pine blister rust in herb-rich pine forests often damages trees with diameters below average. Scots pine blister rust pathogen completes different stages of its life cycle on different plants infecting intermediate host from various species of herbaceous growing in the ground cover of herb-rich pine forests.