Presence of Root Rot Reduces Stability of Norway Spruce (Picea abies): Results of Static Pulling Tests in Latvia (original) (raw)
Related papers
2005
Thor, M. 2005. Heterobasidion root rot in Norway spruce: Modelling incidence, control efficacy and economic consequences in Swedish forestry. Doctor’s dissertation. ISSN 1652-6880, ISBN 91-576-7004-8. In spite of its biological and economic impact on Swedish forestry, root rot caused by Heterobasidion annosum (Fr.) Bref. sensu lato has received no or little attention in forest planning. This thesis summarizes and discusses two experiments involving prophylactic treatment of stumps, and three investigations on the modelling and simulation of root rot in coniferous stands with special emphasis on Norway spruce (Picea abies [L.] Karst.). In 14 previously unthinned stands of Norway spruce, the efficacy of mechanized stump treatments with disodium octaborate tetrahydrate (DOT), Phlebiopsis gigantea (Fr.) Jul. and urea was compared with no treatment of stumps cut in the summer and winter, and with manual treatment. Stump treatment reduced the stump area colonised by H. annosum s. l. by 88...
Forests
Wood properties have an influence on the safety around the tree itself as well as on actual possibilities of using wood. The article focuses on the wood properties of the Norway spruce (Picea abies (L.) Karst.) in reference to the time since the tree has decayed. The study was conducted among mature tree stands of spruce in Białowieża Forest, where over the last 10 years there has been a weakening of spruce tree stands due to water deficiency which has contributed to the gradation of the European spruce bark beetle (Ips typographus). The study focused on spruce wood of living and healthy specimens as well as the wood of standing trees which has decayed between one and five years before the sample was collected. The findings indicate a gradual decrease in wood properties as time passed since the physiological decay of the tree. Significant differences in the decrease of mechanical wood properties have been observed in trees which had been decayed for 3 years and they should be consid...
South-east European forestry
Background and Purpose: Forest damage by wind is an important cause of economic loss in commercial forestry in the Republic of Croatia, as well as in many other European countries. Thus, windthrow resistance of trees represents a significant issue. Spruce forest cultures have shown the lowest resistance to windthrow so far. Nevertheless, there is not much insight into the relationship between trees and stand resistance to wind in the region. The objectives of this paper are to: (i) provide first evidence of the relation between tree characteristics prior to storm event in completely destroyed stands in comparison to slightly damaged stands, (ii) to evaluate the need to consider tree resistance to winds during thinnings, (iii) to evaluate if there is a need for windthrow stability assessment prior to replacement interventions. Materials and Methods: The paper investigates three individual cases of spruce forest cultures on three localities in the hilly part of Central Croatia in the ...
The proceedings are organized under seven headings: Genomics and plant-pathogen interactions; Systematics, taxonomy and phylogeography; Ecology; Population genetics; Etiology and epidemiology; Disease management and control; New reports, diagnostics and research on the application of new diagnostic methods. Following the custom of the IUFRO WP 07.02.01, most presentations dealt with the root rot caused by Heterobasidion annosum, the main agent of root rot in Europe. Molecular studies on the H. annosum species complex, its pathogenicity, the host resistance response, the production of secondary metabolites by various host species, and the use of biochemical markers in selection and breeding for resistance, were the subject of extensive discussion. Participants also directed their attention to other, related topics, such as the new species of Heterobasidion that have been found in Europe, and their relationship with other fungal pathogens. and they discussed climate change. __________...