Spore-producing structures of fungal pathogens.The most common one noted on turfgrass is associated with Anthracnose Foliar Blight and Basal Rot. Masses of Acervuli at the base of the crown of the affected plants provide the characteristic black discolouration assciated with Anthracnose.

AnthracnoseFoliarBlightCM

Acervuli of Anthracnose on Poa annua