ANALYSIS OF THE ORIGIN AND DEVELOPMENT OF THE RED PINE SAWFLY GRADATION IN THE PINE STANDS OF THE NATIONAL PARK “NAROCHANSKY”

UDC 630*4:632.79

  • Blintsov Alexandеr Ivanovich – PhD (Biology), Associate Professor, Assistant Professor, the Department of Forest Protection and Wood Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus. Е-mail: blintsov@belstu.by

  • Lyushtyk Valery Semenovich – Deputy Director General for Scientific Work. State Environmental Institution “Narochansky National Park” (11, Leninskaya str., 222395, Minsk region, Myadelsky district, Naroch settlement, Republic of Belarus). Е-mail: nauka@narochpark.by

  • Kozel Aleksandr Vladimirovich – PhD (Agriculture), Assistant Professor, the Department of Forest Protection and Wood Science. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). Е-mail: kozel@belstu.by

DOI: https://doi.org/10.52065/2519-402X-2022-252-1-58-64

Key words: red pine sawfly, outbreak of mass reproduction, primary foci, egg laying, cocoons in the litter, pheromone traps.

For citation: Blintsov A. I., Lyushtyk V. S., Kozel A. V. Analysis of the origin and development of the red pine sawfly gradation in the pine stands of the National Park “Narochansky”. Proceedings of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resources, 2022, no. 1 (252), pp. 58–64 (In Russian). DOI: https://doi.org/10.52065/2519-402X-2022-252-1-58-64.

Abstract

The results of forest pathology monitoring conducted in the GPU NP “Narochansky” in 2018 are presented. On their basis, as well as on the basis of the analysis of the pest's development stages, data on the threat of overeating needles in 2019 were obtained. It is noted that the primary foci in the classical reserves of this phytophages were practically not recorded. The analysis of forestry and taxation characteristics of stands – reservations of the red pine sawfly by the percentage of threat of crown defoliation was carried out. It has been established that the red pine sawfly during its development and formation of foci prefers pure pine stands of natural origin mossy forest type with a fullness of 0.7 and with an age of 40–100 years. The state of the sawfly population and the possibility of mass reproduction foci formation after the aviation protection of stands are evaluated. The assessment of the population state by cocoons in the litter, by the analysis of wintering eggs and by records in pheromone traps allowed us to make recommendations for the organization of the pest surveillance and the forecast of a possible threat of mass reproduction outbreaks. Results are included in the NP “Narochansky” geographical data bases.

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