Acoustical diagnosis of shaft-wood phyto-pathogenic damage of Sequoiadendron giganteum (Lindl.) Buccholz

Using a supersonic shaft-wood tomography, the evaluation of a shaft-wood phyto-pathogenic damage level of Sequoiadendron giganteum (Lindl.) Buccholz was evaluated. The digital bivariate reflections of the shaft tissue damage were obtained, and the characteristics of comparative parameters of the wood-decay degree were given. The results allowed to identify the role of some edaphic factors and their effect to vital conditions of S. giganteum and the level of destructive processes by shaft tissue damaging. It was found out that both soil consolidation and waterlogging equally attribute for a phyto-pathogenic damage of the plants. Shaft-wood damage caused by soil consolidation is located mainly underneath of the shaft. In the conditions of an enlarged waterlogging, tissue degradation occurs less intensively, and the destructive processes are more active spread in a vertical section of the shaft. The use of a supersonic tomography method provides wide possibilities to diagnose shaft-wood phyto-pathogenic damages.