|
|
|
Apiognomonia-Beech Anthracnose - Apiognomonia errabunda
|
Symptoms / species
|
Impact / measures
|
Pictures
|
Occurrence map
|
 | | In spring brown spots on the leaves, irregular in shape, later on larger areas or the whole leaf brown and finally dry.
More rarely dieback of small shoots. The symptoms can be mistaken for those by the Beech Leaf Miner (Rhynchaenus fagi), the tunnels of which may also result in browning of the leaf (watch for zigzag-lines or holes!), or also mistaken for damage by spring frost.
| | | Affected tree species | Beech; | | Affected parts | Shoot/Twig/Branch; |
|
| Beech Anthracnose often follows heavy rainfall in spring, as well as epdiemics of certain gall producing insects. Apiognomonia errabunda ist usually present in nearly every leaf asa a harmless ednophyte, which, triggered by the sucking insects,starts growing and destroying leaf tissues. As a consequence, the insect larvae in the mines die from starvation. By this mechanism the population density of the insects can be regulated. There are usually no endangering effects on the tree's health, since the beeches produce new leaves in the same year.
Curative measures
None necessary.
|
| Apiognomonia errabunda: early stage of dieback | | Apiognomonia errabunda: early stage of dieback | | For comparison: shothole-like symptoms by the Beech Mining Weevil | | Apiognomonia errabunda: redbrown spot on a leaf, with fruiting structures of the fungus in the centre | | Apiognomonia errabunda: asexual spores (conidia) | | Conidiomata (asexual stage) of Apiognomina errabunda associated with feeding damage by larvae of the Oak Slugworm Caliroa annulipes |
| 2020
Heiligenkreuz | 2010
Röthelstein | | Hafning bei Trofaiach | | Freinberg | 2009
Waidhofen an der Thaya | 2008
Waldneukirchen | 2003
Spital am Semmering |
|
|
