Tar rot fungus (Rhytisma acerinum) on fallen maple leaves in Sosnovka Park. St.Petersburg, Russia
Album 2009: Saint Petersburg, Russia, March 23, 2017
The image depicts a close-up view of fallen maple leaves scattered on the ground, with several dark spots visible among them. These spots are likely caused by the presence of tar rot fungus (Rhytisma acerinum).
**Key Features:**
* **Tar Rot Fungus:** The fungus is characterized by small, circular or oval-shaped lesions that appear as dark brown to black patches on the leaves.
* **Lesions:** The lesions in the image are scattered across the surface of the leaves and vary in size. They have a rough, irregular texture and may be slightly raised above the surrounding leaf tissue.
* **Leaf Characteristics:** The leaves themselves appear dry and brittle, with some exhibiting signs of decay or damage. This suggests that they have been on the ground for an extended period.
**Background:**
The background of the image is not visible due to the close-up nature of the photograph. However, it can be inferred that the leaves are lying on a surface such as soil, grass, or another type of vegetation.
**Overall Impression:**
The image provides a detailed view of the tar rot fungus and its effects on fallen maple leaves. The presence of multiple lesions on several leaves suggests that the fungus has spread rapidly across the area where the leaves have accumulated. This could indicate that the fungus is thriving in this environment, possibly due to factors such as high humidity or optimal temperature conditions. – AI vision
