Monitoring the state of St. Petersburg tree plantations: modern and traditional approaches

It is proposed to use the Tree Talker monitoring system in combination with traditional methods of phytopathological and entomological monitoring to ensure timely detection of changes in the state of plantations in St. Petersburg and identify key factors of environmental stress. Diverse departmental affiliation and a wide species composition of the city's plantations, as well as the presence of numerous environmental factors that negatively affect the condition of trees, the appearance of invasive pathogens and pests create poorly predictable situations. The emergence of invasive pests and pathogens, such as the causative agent of the Dutch elm disease, the Ascomycete fungi Ophiostoma novo-ulmi and its spreaders – the sapwood bark beetles, another Ascomycete, the Hymenoscyphus fraxineus fungus, and the Emerald ash borer Agrilus planipennis in including due to late detection of these pathogens and pests. In the context of the disunity of the management system of urban plantings due to different departmental affiliation, mosaic location, species diversity and specificity of the species composition of woody plants, as well as requirements for prompt decision-making, the use of Tree Talker technologies becomes very promising. These technologies allow for the prompt receipt, transmission and analysis of data on the daily and seasonal dynamics of physiological parameters, the resistance of trees to wind loads, taking into account the species, age and size. Integration of the obtained data allows us to evaluate the effectiveness of plantings in general in terms of creating a microclimate, the dynamics of vertical deviations, and the effectiveness of sanitary and recreational activities. As a result, obtaining operational information allows us to timely detect unfavorable changes both in individual trees and in the structure of plantings and to analyze the causes of these changes, especially in relation to the emergence of biological threats to the plantation – the spread of dangerous pathogens and the reproduction of pests.

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