Maple – Tar Spot
Rhytisma acerinum Maple – Tar Spot Signs & Symptoms
Sample 1: Infected leaves
Sample 1: Infected leaf
Sample 2: Apothecia in tar spots
Sample 2: Apothecia in tar spots
Sample 2: Apothecia in tar spot with hymenia evident
Sample 2: Apothecia in tar spot with hymenia evident
Maple – Tar Spot Pathogen
Vertical cross-section of apothecium with ascospores emerging
Vertical cross-section of apothecium with ascospores emerging
Vertical cross-section of apothecium with ascospores emerging
Vertical cross-section of apothecium with asci and paraphyses apparent
Ascospores with mucilagenous appendage faintly apparent
Ascospore with mucilagenous appendage apparent
Asci
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Maple – Tar Spot