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Tar Spot - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
<figure class="photo"><a href="https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html" title="Tar Spot - Rhytisma acerinum"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/116182_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1638403210&Signature=wi3RkLb7Ui6i7u8vFbQ0c3K%2Fa3k%3D" width="108" height="152" alt="Tar Spot - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Fall,Geotagged,Rhytisma acerinum,United States" /></a></figure><br />
<figure class="photo"><a href="https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html" title="Tar Spot - Rhytisma acerinum"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/116184_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1638403210&Signature=E1Mt2mawF6IgMJ5iICDwNvgN0oQ%3D" width="200" height="150" alt="Tar Spot - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Acer,Fall,Geotagged,Rhytisma,Rhytisma acerinum,United States,biotrophic parasite,fungus,maple tar spot,plant pathogen,tar spot" /></a></figure><br />
<figure class="photo"><a href="https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html" title="Tar Spot (Underside) - Rhytisma acerinum"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/116183_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1638403210&Signature=uoCFQORd96ZP%2FKJajVHPAVEle24%3D" width="200" height="162" alt="Tar Spot (Underside) - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Fall,Geotagged,Rhytisma acerinum,United States" /></a></figure> Fall,Geotagged,Rhytisma acerinum,United States Click/tap to enlarge

Tar Spot - Rhytisma acerinum

Host: Maple leaf; mixed forest

Tar Spot - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Fall,Geotagged,Rhytisma acerinum,United States

Tar Spot - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Acer,Fall,Geotagged,Rhytisma,Rhytisma acerinum,United States,biotrophic parasite,fungus,maple tar spot,plant pathogen,tar spot

Tar Spot (Underside) - Rhytisma acerinum Host: Maple leaf; mixed forest<br />
https://www.jungledragon.com/image/116182/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116184/tar_spot_-_rhytisma_acerinum.html<br />
https://www.jungledragon.com/image/116183/tar_spot_underside_-_rhytisma_acerinum.html Fall,Geotagged,Rhytisma acerinum,United States

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''Rhytisma acerinum'' is a plant pathogen that commonly affects sycamores and maples in late summer and autumn, causing tar spot. Tar spot does not usually have an adverse effect on the trees' long-term health. ''R. acerinum'' is an Ascomycete fungus that locally infects the leaves of trees and is a biotrophic parasite. The disease is cosmetic and is therefore usually controlled only with sanitation methods.

Similar species: Rhytismatales
Species identified by Christine Young
View Christine Young's profile

By Christine Young

All rights reserved
Uploaded Jun 4, 2021. Captured Oct 6, 2020 14:50 in 5 East St, New Milford, CT 06776, USA.
  • Canon EOS 90D
  • f/5.6
  • 1/197s
  • ISO1000
  • 100mm