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.

Featured Articles

How Tar Spot of Corn Impacted Hybrid Yields During the 2018 Midwest Epidemic

Tar spot of corn is a new disease to the United States that was first observed in 2015 in Indiana and Illinois. Since then, it has also been confirmed in Florida, Iowa, Michigan, Ohio, and Wisconsin. In 2018, a tar spot epidemic occurred in the upper Midwest, which had a significant impact on corn grain and silage yield and quality. Little field screening has been done in the US for corn germplasm... Read More

Foliar Fungicide Decisions for Late-Planted Crops

Many farmers are now asking if fungicide application(s) will provide an adequate return on investment. The answer to this question will be crop, region, state and field specific. However, there are guidelines that can aid in determining if a fungicide application will be a sound investment in 2019. Read More

Soybean Seed Quality Considerations for 2019

Seed quality from the 2018 soybean harvest was below average across the majority of the soybean-producing areas of the United States. Several factors led to poor-quality soybean seed, but some of the most important were wet conditions throughout the fall and subsequent delayed harvest. The wet conditions delayed harvest and created the right conditions for several seed diseases. Read More

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Eyespot of Corn

The initial symptoms of eyespot are small, water-soaked or chlorotic circular spots. The tissue at t... Read More

Soybean Vein Necrosis of Soybean

Symptoms caused by Soybean vein necrosis virus (SVNV) often begin as yellowing near leaf veins that... Read More

Rhizoctonia Seedling Blight and Root Rot of Soybean

Rhizoctonia seedling blight and root rot of soybean can cause pre- and postemergence damping off. In... Read More