The health status of 6−16−year−old poplars (mostly Populus robusta) in the sanitary protection
zones around Legnica and Głogów copper mills (SW Poland) is described. The health of the
poplars was assessed as a frequency of trees with symptoms of stem canker and occurrence of virus
diseases on leaves. Fungi were isolated from 24 samples of canker wood (20×20×20 cm each) in
five afforested complexes and then identified on the basis of colony morphology and sporulation
on PDA and SNA after 40 days of incubation. Cankers occurred on <5−95% of poplar trees. Poplar
mosaic virus was observed sporadically in collections of P. robusta, P. balsamifera and P. gerlica.
The canker wood was colonized by 20 species of facultative pathogens. Acremonium pteridii,
Exophiala sp. and Gibberella baccata were the most common and frequent (in 4−5 complexes).
Aureobasidium pullulans, Epicoccum nigrum and Fusarium solani occurred in 3−4 complexes. Alternaria
alternata, Cadophora fastigiata, Didymella molleriana, Fusicolla aquaeductuum, Gibberella avenacea,
Graphium sp., Leptosphaeria maculans, Nectria inventa, Phoma herbarum, P. minutella, Sarocladium
strictum, Trichosporon ovoides and Valsa sordida were less frequent and often occurred only locally.
The fungi recorded may serve as indicators of the vitality and health status of trees in industrial
zones. The best approach to eliminate the risk of colonization by pathogens is to maintain trees
in a state of vigorous growth. Management practices that promote good growth include fertiliza−
tion, watering during drought, avoidance of unnecessary wounding of trunk and roots, and using
correct pruning procedures