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Project Noah Nature School
Rhytisma acerinum
Rhytisma acerinum is a plant pathogen that commonly affects sycamores and maples in late summer and autumn.. acerinum is an Ascomycete fungus that locally infects the leaves of trees and is a biotrophic parasite.
Spotted on big leaf maple leaves in a mixed forest.
Spotted on Oct 18, 2017
Submitted on Jan 13, 2018
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