canker (botany)

A general term for a localized disease of woody plants, in which bark formation is prevented; typically caused by bacteria or fungi.

Canker and anthracnose are general terms for a large number of different plant diseases, characterised by broadly similar symptoms including the appearance of small areas of dead tissue, which grow slowly, often over a period of years. Different cankers and anthracnoses are caused by a wide range of organisms, including fungi, bacteria, mycoplasmas and viruses.

Some cankers:

Apple canker, caused by the fungi Nectria galligena Ash bacterial canker, caused by the bacterium Pseudomonas syringae Butternut canker, caused by the fungus Sirococcus clavigigenti-juglandacearum Citrus canker, caused by the bacterium Xanthomonas axonopodis Cypress canker, caused by the fungi Seridium cardinale Dogwood anthracnose, caused by the fungus Discula destructiva Grape canker, caused by the fungus Eutypa lata Honey locust canker, caused by the fungus Thyronectria austro-americana Mulberry canker, caused by the fungus Gibberella baccata Oak canker, caused by the fungus Diplodia quercina Pine pitch canker, caused by the fungus Fusarium pini Plane anthracnose, caused by the fungus Apiognomonia veneta Poplar canker, caused by the bacterium Xanthomonas populi Rapeseed stem canker, caused by the blackleg fungus Leptosphaeria maculans Rose cankers, caused by the fungi Leptosphaeria coniothyrium and Cryptosporella umbrina Scleroderris canker, caused by the fungus Gremmeniella abietina Willow anthracnose, caused by the fungus Marssonina salicicola