Stem Canker of Rose
By Randy Drinkard - Posted on 16 July 2009
Several fungi are capable of causing stem canker and dieback of roses.
Cankers begin as spots ranging in color from yellow to purple, depending on the causal fungus. The developing cankers become sunken, forming wrinkled or cracked lesions that are tan to black. Canker margins are brown to reddish purple. Numerous small, black, wart-like specks embedded within the canker area are fruiting bodies of the causal fungus. Cankers often enlarge until the stem is girdled. Once the stem is girdled, the foliage above the canker wilts and dies. Cankers that form at the graft union usually result in plant death.
UGA Center for Urban Agriculture
Votes:28
Comments: 0