Verticillium wilt on norway maple (Acer platanoides L.) in the east of Ukraine
Journal Title: Наукові праці Лісівничої академії наук України - Year 2016, Vol 14, Issue
Abstract
Massive Norway maple decline was registered in forest and ornamental stands of the East of Ukraine. The pathogen was identified as Verticillium dahliae. It infects different maple species and some other forest trees. The main symptoms of disease are wilt, foliage and xylem discoloration, defoliation, long green streaks in sapwood, dieback. Crown damage decreases with stem diameter. It is the highest in the forest (78.5 %), the lowest in the street (21.5 %) and intermediate in the park (44.9 %). In the streets foliage damage was 59.4% and 30.5% in the maple trees with and without mechanical wounds in the lower part of stem, which were caused during weeding. Such wounds were absent in the forest. Weather conditions of 2016 (early beginning of sap flow, fluctuation of temperature, high maximal air temperature and low precipitation) were favorable for wilt development. Preventive measures of wilt spread can be used only in nurseries. Removal of affected maple from mixed oak stand may be unfavorable for oak growth.
Authors and Affiliations
Valentyna Meshkova, Kateryna Davydenko
Keywords
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