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. N.C. State University, Raleigh, NC 27695-7603.