Pythium Root Dysfunction of Creeping Bentgrass

Fig. 20. Oogonia and antheridia of P. aristosporum produced in grass-leaf blade cultures. Antheridia are monoclinous, are typically club-shaped or crook-necked with up to 8 per oogonium. Oogonia range in size from 27 to 45 µm with an average diameter of 32.7 µm. (Courtesy of Gloria Abad, USDA).



Image from Plant Health Progress article:
Pythium Root Dysfunction of Creeping Bentgrass