The species composition of tree and shrub plantations and their forest pathological state

The stability of forest ecosystems and their resilience in the event stressful situations is determined by species composition tree shrub plantations. Forest represent a biological system consisting community interconnected living organisms dominated woody vegetation, with direct influence abiotic factors complex. research purpose to determine pathological state. 13 trees (3 coniferous species, 10 deciduous species) 6 shrubs grow on territory Volzhsky forestry. In stand, proportion varies from 0.1% 29.4%, 8.3%. Among lanceolate ash dominates (29.4%), among conifers, Siberian larch (12.7%), shrubs, common lilac (8.3%). conducted studies allowed identify 28 harmful (18 - pests pathogens fungal, viral non-infectious diseases). pests, ecological group leaves needles was most represented 37.9% 11.1% diseases trunks branches 19.7%. affected damaged small-leaved elm, so 94% were 59% diseases.