Evaluation of the vital state of <i>Magnolia grandiflora</i> L. in the Arboretum of the Nikitsky Botanical Gardens using the method of ultrasound tomography

As a result of instrumental diagnostics of the state of trunk wood, the level of phytopathogenic damage of the most old-age specimens of Magnolia grandiflora L. in the Arboretum of the Nikitsky Botanical Gardens is estimated. Digital two-dimensional images of the trunk wood were obtained, and the relative indicators of the degree of its destruction were characterized. The results of the research allowed us to identify some patterns in the nature of the distribution of destructions in the trunk wood of M. grandiflora . It was found that of the six studied specimens of M. grandiflora , the greatest destruction of trunk wood was found in two 130-year-old trees growing in The Upper Arboretum Park. There was no correlation between the presence and degree of destruction of M. grandiflora trunk wood and the age of the trees examined. The use of the ultrasound tomography method expands the possibilities of diagnostics of phytopathogenic lesion of the trunk wood. The combination of visual assessment and instrumental diagnostics of trunk wood allows us to obtain more complete information about the vital state of trees.