Agronomic Solutions

Corn Disease Management

  • Fungicide use on Wyffels Hybrids

    Fungicide applications are a tool corn growers can use to achieve maximum corn yields. Fungicide treatments have been proven to protect yield potential when leaf diseases are present and improve late season harvestability. All hybrids can respond positively to a properly timed fungicide application, especially in environments that favor the development of leaf disease.

  • Stalk Rot Diseases

    Stalk rot diseases of corn are common in the Midwest and are present in every field to some extent. When conditions are warm temperatures and high humidity leaf disease development will continue. In addition, the appearance of N deficiency symptoms on leaves also point toward a higher risk of stalk rot development.

  • Southern and Common Rust

    Each year presents conditions that are favorable for different leaf diseases. Even if some common diseases aren’t as prevalent in a given year, it’s still important to monitor plant health throughout the summer and be aware of diseases that could impact yield potential. One disease that deserves particular attention this year is southern rust.

  • Ear Rots and Kernel Molds

    Stressful growing seasons have the potential for increase of some ear rots or kernel molds, especially Aspergillus ear rot. This can lead to aflatoxin production by the fungus causing harvest and handling problems for the grower. Early detection prior to harvest and special handling and storage when ear rots and kernel molds are present can help reduce the risk of serious damage to the value of the grain.

  • Minor Corn Diseases and Lesions

    There are corn leaf diseases that need immediate treatment to protect and maximize yield. However, there are a lot of blotches and spots that won’t harm yield, but could easily be mistaken for more serious diseases. Much attention is given to diseases that require treatment, but it’s just as important to know which ones don’t require treatment. Here’s how to tell the difference.

  • Common Leaf Diseases

    Above average rainfall provides the ideal environment for development and spread of leaf diseases in corn. If diseases are identified in time there are options to control them to ensure they don't affect yield potential. A fungicide application should be considered for fields showing fungal disease symptoms.

  • Goss's Bacterial Wilt Hybrid Rating

    Most corn diseases of economic importance are caused by fungal pathogens, not bacteria. Fungal pathogens easily spread by air borne spores that require moisture on leaves for initial infection and continued development. The infection by Goss’s wilt, a bacterial disease, is mainly through injury to the leaves caused by heavy winds, rain, hail or sand blasting.