Pythium Root Dysfunction of Creeping Bentgrass

Fig. 9. Necrotic crowns associated with creeping bentgrass plants suffering from PRD. This plant symptom is usually only observed during the summer months. This symptom commonly leads to a misdiagnosis of take-all patch, yet copious amounts of runner hyphae typical of take-all patch are not observed in the necrotic areas.



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