 |
Leaf necrosis: Small
black spots that grow together to form larger spots. Not dangerous
for the tree. |
 |
Poplar blight: In
the summer, spores collect on the bottoms of leaves. In the fall
there is brown then black discoloration on the top of the leaf.
This can lead to losses in growth. |
|
|
|
|
|
|
| |
Disease of the shoot ends:
Black colored leaves, dried out shoot ends. |
| |
|
|
|
Cauliflower galls(Aceria
populi (NAL.)): Not dangerous for the tree. |
|
|
Aphids (Parathecabiuslysimachiae):
Leaf deformation caused by aphid outbreaks. Not dangerous for the
tree. |
|
|
Bark blight:Wound
ebullition after bark necrosis through Cryptodiaporthe populea. |
|
|
Leaf stem gall (Pemphigus
spirothecae PASS.): Not dangerous for the tree. |
|
|
Canker (Nectria galligena):
Fungi that leads to the breaking off of bark. Affected twigs and
branches should be removed and burned. If the trunk is affected,
then an expert should be called to remove canker. |
| |
|
|
|
| Fungi |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Aspen Trunk Rot
|
|
|
|
|
|
|
|
|
|
|
|
Polyporus rheades
|
|
|
Poria obliqua
|
|
|
|
|
|
|
|
|
|
|
