|
|
|
First damage in spring (about mid of May in Germany) is less obvious. However, the young mines rapidly gain in size. |
|
|
|
In this pictureres, the leaf has been attacked by the moth exclusively. |
|
Diagnosis of Cameraria ohridella |
|
There are only a few insect species feeding on horse chestnut; determination of the presence of the chestnut leaf-miner is therefore actually quite straightforward. It is possible, however, that the mines may be confused with a brown leaf mould or damage caused by salt. |
|
|
|
First damage in spring (about mid of May in Germany) is less obvious. However, the young mines rapidly gain in size. |
|
|
|
In this pictureres, the leaf has been attacked by the moth exclusively. |
|
|
Leaf with the brown leaf mould (Guignardia aesculi) and mines of Cameraria ohridella. |
|
|
To be certain, the leaf should be held up to the light. If the damage is a horse chestnut leaf-miner burrow, it will be possible to identify a larva, chrysalis, or, at least, larval frass. |
|
|
In late summer and autumn the amount of damage caused by (Guignardia aesculi) increases, resulting in many misidentifications. |
|
Last
modified: |
