Occurrence of fungal diseases on willow (Salix sp.) plantations of different age

摘要

The occurrence of stem and leaf diseases caused by pathogenic fungi was assessed on a shrot rotation willow plantation in Kraków. Willow bushes of different age (two, four - years) were cultivated on the plantation. The research was conducted in 2006-2007. Stem cancer caused by Cryptodiaporthe salicella as a willow shoot disease occurred with the higest frequency, while the most important leaf diseases were leaf spotting {Drepanopeziza spp.) and willow rust (Melampsora spp.). The oldest bushes of willow were most severely damaged by shoot and leaf diseases. Monitoring of willow diseases is a necessary strategy for the monitoring of sanitary conditions of willows grown as bioenergetic plants.