Disease Gallery

Cotton Root Rot
Image courtesy of Becky Carroll, Oklahoma State University

Disease Details

Name: Cotton Root Rot

Latin Name: Phymatotrichum omnivorum

Description: There is no resistance to severe infestations. Avoid areas where this disease occurs. Can be controlled in non-calcareous soils below 6.5 pH.

Disease Life Cycle: Infects roots of mature plants, rotting the tap root. Grows as mycelial strands on root surface and has unique cross-shaped hyphae. Symptoms usually noticeable in summer months.

Disease Symptons: First symptom of infection is leaf wilting. Plants may die quickly with leaves still on the tree.