Genetic diversity is a prerequisite for conservation of the adaptablity of future forests to the changing environment. Therefore we need to further develop, plan and implement measures for enetic protection of forests, and incorporate them in forest management and detailed silvicultural planning.
F.30 Professional assessment of the situation
COBISS.SI-ID: 5402022An overview of approved basic material (seed objects) in Slovenia was presented and its improvement per species, provenance region and elevation zonation proposed at the workshop for all different stakeholders groups in forestry in Slovenia.
F.30 Professional assessment of the situation
COBISS.SI-ID: 5517990Pests and diseases together with harmful abiotic factors present a serious problem for the production of healthy and vital forest tree seedlings. In order to examine the most important and most frequently occurring harmful abiotic and biotic factors, we analyzed the annual reports of health surveys from 18 forest nurseries in the period 1997-2018. The results revealed that the observed injuries were caused by pathogenic fungi in 68 % of cases, insects in 29 % of cases and abiotic factors in 1.1 % cases. Injuries occurred on 45 different tree and shrub genera, with Quercus sp. and Pinus sp. being the most frequently damaged (24.1 % and 17.5 %, respectively). Damage was frequently observed on leaves or needles (64.0 %). The most commonly reported diseases were powdery mildews (Erysiphe sp.). The greatest variability in the number of pests and diseases appeared on pines (Pinus sp.). Damage to planting stock usually occurred at low intensity (up to 10 %) but varied considerably during the period. The production of quality and healthy planting stock requires a holistic approach to seedling care.
F.30 Professional assessment of the situation
COBISS.SI-ID: 5574566