Corn

Encylopedia

Anthracnose Leaf Blight of Corn

Anthracnose leaf blight seldom causes yield loss. Early in the season, lower leaves usually show symptoms first. Later, symptoms can occasionally be found on upper leaves. Leaf lesions are oval or spindle shaped, tan or brown with dark brown or purple margins, up to 1 inch long and ½ inch wide. As... Read More

Anthracnose Stalk Rot of Corn

Anthracnose is likely the most prevalent stalk rot in the eastern United States. Affected plants have shredded pith and die prematurely. Anthracnose also causes a distinctive blackening of the stalk rind. Initially, these areas are narrow, water-soaked lesions, but they turn very dark and shiny and can join together to form large black blotches or streaks over the gro... Read More

Aspergillus Ear Rot of Corn

Aspergillus ear rot is one of the most important diseases of corn. Typically, this disease is more common in the southern United States than in other areas. Aspergillus ear rot appears as an olive-green mold on the kernels that may begin at the tip of the ear or... Read More

Bacterial Leaf Streak of Corn

Bacterial leaf streak has been observed on field corn, seed corn, popcorn, and sweet corn. Symptoms are tan, brown, or orange lesions that occur between the veins of the corn leaves. Lesions are long, narrow, and less than 1 inch to several inches long. Lesions also can occur close to the leaf midrib or acro... Read More

Bacterial Stalk Rot of Corn

Bacterial stalk rot can occur any time during the season, particularly if conditions are very wet. It causes decay of the first internode above the soil. The rind and the pith become soft, brown, and water-soaked. Affected plants have a foul odor. The stalk typically twists and falls over, but the plant may remain green for several we... Read More

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