DETERMINATION OF LARCH SPECIES IN THE JEWISH AUTONOMOUS REGION AND ASSESSMENT OF ITS PHYTOSANITARY STATE

Abstract

At present, it is especially acute to study valuable forest species at the genetic level in order to ensure their safety, species identification and the origin of wood control. Larch (Larix) is one of the ecologically and economically important conifers in our country. Preservation and study of the forest plant species genetic diversity anywhere, including the Jewish Autonomous Region (EAO), is one of the fundamental challenges of modern botany, ecology, genetics and dendrology. In the article, the author analyzes samples of larch stand needles collected in the Jewish Autonomous Region. Using the necessary loci, selected by means of the genetic method, the author analyzed features of the Larix gmelinii and Larix sibirica species [4] No less urgent is the problem of plant damage by phytopathogens. A phytopathogen is a causative agent of plant disease that releases biologically active substances that have a detrimental effect on metabolism, affecting the root system, disrupting the function of chloroplasts, growth processes, and the supply of nutrients. Violation of metabolism in plant cells and organs, resulted in their productivity decrease or complete death, leads to the disruption of populations’ integrity and causes enormous harm to both agricultural crops and forest-forming species. This work shows the results of analysis of the larch plantations phytosanitary state and the percentage of healthy and affected plantations in the regions. The comprehensive laboratory analysis has shown that the laboratory methods successfully complement each other. It is possible to give a complete and correct description of taxonomic and biological characteristics of a phytopathogen using simultaneously several laboratory techniques for its identification. Ultimately, it should be of help in the development of methods for combating pathogens.