Crop Protection Network

The Crop Protection Network (CPN) produces unbiased, collaborative outputs on important issues affecting field crops in the United States and Canada. The CPN is a product of Land Grant Universities.

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Frogeye Leaf Spot

Stem Canker

Pod and Stem Blight and Phomopsis Seed Decay

Fungicide Efficacy for Control of Corn Diseases

Encyclopedia Articles

Foliar Diseases

A variety of foliar diseases cause yield loss every year in corn. Symptoms on leaf tissue, such as d... Read More

Maize Dwarf Mosaic of Corn

Maize dwarf mosaic of cornMaize dwarf mosaic is caused by the Maize dwarf mosaic virus. Infected pl... Read More

Diplodia Stalk Rot of Corn

Diplodia stalk rot of cornDiplodia stalk rot is caused by the fungus Stenocarpella maydis. Plants a... Read More

Encyclopedia Articles

Foliar Diseases

A variety of foliar diseases cause yield loss every year in corn. Symptoms on leaf tissue, such as disease lesions, can reduce the photosynthetic capabilitiesof the plant. Other diseases destroy or distort corn tissue. Read More

Maize Dwarf Mosaic of Corn

Maize dwarf mosaic of cornMaize dwarf mosaic is caused by the Maize dwarf mosaic virus. Infected plants have a stippled (small, discolored specks) mottle or mosaic of light and dark green that may develop into narrow streaks on the youngest leaves. There may be a shortening of internodes causing a stunted, bunchy appearance of the plant. As plants mature and temperatures rise, mosaic symptoms oft... Read More

Diplodia Stalk Rot of Corn

Diplodia stalk rot of cornDiplodia stalk rot is caused by the fungus Stenocarpella maydis. Plants affected by Diplodia stalk rot have shredded pith and die prematurely. Numerous black dots, about the size of a pinhead or smaller, can be observed in the lower internodes of the stalk. Under very wet conditions, a white mold may develop on the stalk surface. Infections occur through the crown, roots... Read More