Sanitary and forest pathology of Pitsunda pine (Pinus brutia var. pityusa (Steven) Silba) in Dzhankhot forest

Pitsunda pine (Pinus brutia var. pityusa (Steven) Silba) is a relict endemic of the Black Sea coast. Currently, one of the pressing issues of preserving natural populations of Pitsunda pine is the study of the resistance of stands to a complex of biotic, abiotic and anthropogenic factors. The aim of the study was to assess the sanitary and forest pathological condition of stands in the Dzhankhot Bor botanical natural monument (Krasnodar territory). Field work was carried out in the vicinity of the Dzhankhot settlement in the Krasnodar territory. To assess the condition of the forest stand, 6 temporary trial plots were laid in a pine forest with smoke tree in the undergrowth, in an oak-hornbeam pine forest and an oak-bush pine forest, where 1178 Pitsunda pine trees were recorded. The results of the study showed that the best sanitary condition of Pitsunda pine is found in pine forests with smoke tree in the undergrowth, where the number of drying and dead trees does not exceed 2%, and these are trees that are not included in the first tier. In the oak-hornbeam pine forest, the condition of the pine is worsening, the number of weakened trees is 54%. The condition of the trees in the needle pine forest is satisfactory – 46.5% of the trees belong to the first category of condition (no signs of weakening) and 41.7% to the second (weakened), the number of dead trees does not exceed 5%. Of the xylophilous beetles, the mass species include bark beetles of the genus Tomicus, in the pine forest with smoke tree in the undergrowth, a population of the pistachio borer (Capnodis cariosa Pallas) was noted. To preserve the populations of Pitsunda pine on the Black Sea coast of Russia, further research is required to monitor the sanitary and forest pathological condition of the stands.

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