Notes on Apple Diseases: Russeting
Russeting is the presence of brown scars of the surface of the fruit. There are many different causes for russeting on fruit, which include frost damage, fungal infections like powdery mildew, yeast and bacteria growth, herbicide drift and phytotoxicity.
Period of activity
Russeting can occur on the fruit throughout the growing season.
Monitoring and Thresholds
There are no thresholds for russeting.
There are several causes for russeting and some are controllable, while others are not. As a result, it is often difficult to manage this disease in the orchard. Several important tips for russeting reduction in your orchard are as follows:
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