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Rio Grande Gummosis (fungus - Physalospora rhodina, also known as Diplodia natalensis, possibly other fungi involved)

This is not a common disease. Narrow cracks appear in the bark which exude a pale yellow gum. Symptoms are usually found in association with injured or dead branches. The wood beneath infected tissue is pink to orange in color. Later, gum pockets develop beneath the bark. Stressful growing conditions, such as freeze damage, high water table, salt accumulation, and poor cultural practices predispose trees to the disease. Removal of dead wood and pruning which promotes quick healing is recommended as a preventative measure.

 

 

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