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Symptoms
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Canker-like swellings on twigs, branches and stems, mostly elongated, of various size and later opening longitudinally; bordered by callus; infested crown parts with shrubby and dense branching (witches brooms), in the cankers orange colored, disc-shaped fruiting-bodies (apothecia) about 1 mm in size.
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Impact
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On moist sites with high air humidity (depressions), epidemics favoured by light deficiency, stand density and high precipitation. Furthermore there is a relation to certain provenances of larches. The disease causes a slow dieback of twigs and branches and more rarely of the stem.
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Control
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Curative Measures are not possible;
preventive measures:
hygienic:
remove carefully infective plant material
thinning of dense stands
afforestation only with well adapted provenances
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| Hosts |
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Larch;
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| Affected plant parts
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Shoot/Twig/Branch;
Stem;
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