Symptoms first appear as yellowish areas which turn brown to black.
Spots often appear on lower leaves first and can coalesce until the entire leaf turns brown-black and dies. The leaves appear to die from the bottom of the plant up the stem. Symptoms are easily confused with those associated with the foliar nematode. Efforts to maximize plant vigor by fertilizing and watering are helpful. However, watering should be done early in the day to give the foliage a chance to dry before nighttime.