The state of tree species of Pushkin
- 1 — Student G.V. Plekhanov Saint Petersburg State Mining Institute
- 2 — Associate Professor G.V. Plekhanov Saint Petersburg State Mining Institute
Abstract
The results of the autumn survey of the sanitary condition of green spaces in Pushkin are given. We studied pathogens of the main tree species on the main roads of the city: near the administration building (spruce), on Sofia Boulevard (European larch), Parkovaya Street (small-leaved lime), Moskovskaya Street (common ash) and Orangereynaya Street (European spruce, prickly spruce, lop birch, smooth elm, brittle willow, maple, small-leaved lime and common ash). No trunk pests or infections were found. All trees were found to be exposed to anthropogenic effects with age, causing stagheadedness, dryness, obvious signs of rot, and the appearance of galls. Trees growing near the carriageway have pronounced abnormality of crown development (lopsidedness) due to close location of asphalt pavement borders, there are mechanical damages formed in conditions of intensive vehicular traffic. The causative agents of the diseases are Swissia trutovica, false and sulfur-yellow. Measures to improve the condition of urban green spaces have been proposed: exclusion of car parking near trees, prohibition of snow dumping in the zone of tree growth, watering plantings in the dry season, treatment of mechanical damage, loosening the soil around trees with signs of crown desiccation, the introduction of organic fertilizers, removal of trees with sloping trunks and signs of trunk rot.
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