Gray leaf spot is also active in the lower canopy at multiple sites across the state. The lesions are light tan in color and generally narrow and rectangular, and can be as long as 2 inches. As the ...

Agronomist Ryan Gentle shares scouting tips and spray timing strategies to control tar spot, southern rust and other corn ...

Tar spot (top right) and southern rust (bottom photos) were hit-and-miss around the Corn Belt in 2025. That made scouting every field especially important. Both diseases often started low and worked ...

USDA is estimating near record corn and soybean crops in Iowa this year, but early yields results indicate that might be difficult to achieve, at least for corn. At the Reints farm in northeast Iowa, ...

WATERTOWN, S.D. — Across most of South Dakota, corn diseases have been worse than normal this year. Madalyn Shires, assistant professor and SDSU Extension plant pathology specialist, hosted a field ...

ST. PAUL -- Corn producers in Minnesota have historically had few widespread and significant problems with leaf diseases, in contrast to most major Midwestern corn-producing states. A leaf and stalk ...

The old adage "knee high by the Fourth of July" has been used to describe corn growth for years. A more modern version would be "knee high by the Fourth of June, and tasseling by the Fourth of July." ...

TOPEKA (KSNT) – Officials are monitoring the spread of a disease that is hurting corn production in Kansas. Tar spot appears as small, dark, raised spots on infected corn and can appear on the leaves, ...

ADAMS COUNTY, Pa. — “Tar spot,” an invasive fungal disease of corn, is expected to expand across Pennsylvania in the coming corn season, after being found for the first time in several counties in ...