Answer: It is possibly a disease or fungal problem although it could also simply be a case of winter damage. For a specific diagnosis and suggested remedies based on the actual identification of the cause, you might want to consult with your local county extension (566-0673). In general it is a good idea to avoid watering the foliage as this results in increased evaporation of the irrigation water as well as inviting foliar problems to develop. When using a sprinkler it is also possible for the water to hit the foliage and then be shed outside the area of the roots, thus resulting in a lack of water in the root zone. This in turn could contribute to winter damage due to drought stress. Hence my hesitation in making a diagnosis long distance.
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