Pecan Scab - Pecan Scab Disease

Hosts:

Pecan Trees.

Description:

This is the most destructive disease of pecans in the South. The fungus overwinters on infected leaves, twigs, and shucks, both on the ground and on the tree. In spring, wind and rain carry the spores to young, rapidly growing shoots, leaves, and developing nuts. Only growing tissue is susceptible, and the fungus causes infection only if there is adequate moisture. Mature foliage and nuts are immune to scab. The disease is most prevalent in areas with frequent rainfall and high humidity.

OSU Extension, Tulsa County
4116 E. 15th Street
Tulsa, Ok. 74112-6198
(918) 746 3701 (Tulsa County OSU Extension)