Tannenkrebs is a trivial name for the rust fungus Melampsorella caryophyllacearum on fir trees. Infected trees form witch brooms, which are clearly visible as growth anomalies on branches and twigs. When the infection spreads to the main trunk, a lumpy trunk-forming thickening develops, which grows from year to year, which is called "tree crayfish", while the tree itself is referred to as "Rädertanne". "Cancer" in phytopathology is not synonymous with uncontrolled tissue growth.
In This Article
Attributes
Similar Species
Tips for Finding
Clean and Preserve
Common Questions
General Info About Fir broom rust
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