Liver Spot on PecanCausal Agent: The fungus Gnomonia caryae var. pecanae
Symptoms: Liver spot is characterized by the appearance of reddish-brown (liver colored) circular spots 1/8 to 5/8 inch in diameter on the lower side of leaflets. In the fall, the spots turn cinnamon brown and contain small, dark fungal-fruiting bodies. This disease sometimes causes defoliation in the more humid southeastern states but is not considered a serious disease in Oklahoma.
Control: A scab control program controls this disease. Please contact your local county extension office for current information.
Return to Main page