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Cenangium – Dieback of pines-Cenangium ferruginosum
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Symptoms / species
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Impact / measures
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Pictures
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Occurrence map
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 | | Dieback of shoots, twigs, and parts of the crown; needles turn yellow to reddish-brown; Cenangium may affect pines of all ages; in late stages needles bleached but remaining attached to the the dead twigs for a long time; small, blackish, flat fruiting bodies exposing dull yellow discs (only when moist!), emerging usually in masses from the dead bark.
| | | Affected tree species | Pine; | | Affected parts | Stem; Shoot/Twig/Branch; |
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| Cenangium ferruginosum is often associated with dieback of crown parts of Pinus sylvestris and Pinus nigra, but the predisposing factors are not totally clear: drought stress and frost seem to be triggering factors.
Curative measures
Solitary trees in urban areas should be sufficiently supplied with water. In forest stands of pines a careful thinning can increase vitality of healthy or only slightly infested trees and prevent secondary invaders (hygienic aspect).
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| Cenangium ferruginosum: dry fruiting bodies (apothecia) | | Cenangium ferruginosum: Apothecia in moist conditions: dull yellow surface (foto Th. Kirisits, University of Agriculture, Vienna) |
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