Pythium Root Dysfunction of Creeping Bentgrass

Fig. 18. P. arrhenomanes oogonia and antheridia produced in grass-leaf blade culture. Production of antheridia is rare in culture. The oogonia are mostly terminal and range in diameter from 24 to 36 µm. Antheridia are numerous (up to 25 per oogonia) and have crooked-necks. (Courtesy of Gloria Abad, USDA).



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