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Home > Tar spot

Tar spot
Photo By gailhampshire
Tar spot
Tar spot
Tar spot

Tar spot

Rhytisma acerinum

A species of Tar spot, Also known as Tar-spot fungus

The tar spot is a pathogen fungus that attacks the trees of the Acer genus (Maples). The first symptoms of the fungal infections caused by Rhytisma acerinum are black spots on the leaves and an early leaf drop. The fungus doesn't affect an infected tree's health in the long term, but it makes an unpleasant sight.

Odor
Odor:

Mildly mushroomy but not distinctive

In This Article
Attributes
Similar Species
Tips for Finding
Clean and Preserve
Common Questions
General Info About Tar spot
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Attributes of Tar spot
Spore Print Color
Black
Odor
Mildly mushroomy but not distinctive
Flesh Bruises
The flesh or milk does not discolor when bruised or cut.
Growth Form
Gregarious
Nutrient Gathering
Saprophytic, Parasitic
Substrate
Living Leaves, Leaf or Needle Litter
You can find Tar spot by these plants:
Sycamore, Maples
Occurence Habitats
Deciduous Woodland

How to Identify Tar spot

Habit & Habitat
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Habitat of Tar spot
The tar spot is a fungus that attacks various kinds of trees, especially sycamores and maples. It forms black spots on both living and dead leaves.
Scientific Classification of Tar spot
Phylum
Sac fungi
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Class
Leotiomycetes
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Order
Rhytismatales
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Family
Tar spot fungi
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Genus
Tar spot
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Similar Species to Tar spot
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Tips for Finding Tar spot
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What are Some Tips for Finding Tar spot
  • Look for Sycamore trees, as tar spot is commonly found on these hosts.
  • Examine the undersides of leaves on these trees for the presence of tar spot.
  • Search for fallen leaves around Sycamore trees to find tar spot's signature markings.
  • Gently turn over leaves on the ground to inspect for tar spot without disturbing the habitat.
How to Clean and Preserve Tar spot
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Common Questions People Also Ask
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What causes tar spots on maple leaves?
How do I get rid of tar spot on my maple tree leaves?
When does tar spot appear?
Where does tar spot grow?
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