Sometimes the disease does not produce well-defined spots but causes a leaf to look withered as if it has been injured by adverse weather. Lesions may grow together, and large areas of the leaf may die. First symptoms are brown spots at the tips of young leaves. Each young spot has a dark brown netted design within the lighter brown area of the spot. These lines are best seen when the leaf is held up to the light.
First symptoms are brown spots at the tips of young leaves.
Each young spot has a dark brown netted design within the lighter brown area of the spot. These lines are best seen when the leaf is held up to the light. Plants may be slightly or severely stunted, and the youngest leaves may develop parallel spots or streaks. Some strains form football-shaped spots with light green or gray borders and green centers. N.C. State University, Raleigh, NC 27695- 7616.