The occurrence of stem and leaf diseases caused by pathogenic fungi was assessed on a shrot rotation willow plantation in Zabierzów Bocheński near Niepołomice. Willow bushes of different age (five, four, two – year) 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 willow rust (Melamspora spp.) and leaf spotting (Drepanopeziza 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 control of sanitary conditions of willows grown as bioenergetic plants.
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