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Vien spot on pecan. Causal Agent

The fungus Gnomonia nerviseda 

 

Hosts

Pecans. 

 

Symptoms

Vein spot infections (lesions) are very similar to those caused by the scab fungus. Vein spot lesions, however, tend to be linear rather than round and also tend to be restricted to veins. 

 

Control

In Oklahoma, this disease is usually not serious and is easily controlled by most scab control fungicides. Triphenyl tin formulations, however, are not very effective. Please contact your local county extension office for current information. 

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