Causal Agent

The fungus Gnomonia caryae var. pecanae 

 

Hosts

Pecans. 

 

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.