“Is 2023 going to be a bad year for tar spot?” That was the question an Illinois farmer recently asked Ken Ferrie, Farm Journal Field Agronomist. It’s a question Ferrie has asked himself repeatedly ...

As farm country heads into pollination season, weather conditions have Ken Ferrie concerned about tar spot erupting into a significant yield robber this season. He says he is fielding a lot of grower ...

Since first being confirmed in northwest Ohio at the end of the 2018 growing season, tar spot of corn has become an annual ...

Tar spot, a fungal disease that has steadily established itself in Kansas cornfields over the past few years, has been detected again in the state, with the first confirmed report of 2025 occurring ...

Tar spot is caused by the fungal pathogen Phyllachora maydis. Under favorable conditions for disease, yield loss on susceptible hybrids can be severe. Tar spot was first identified in DE at the end of ...

In the transition period between harvest and planting, farmers focus on combing through their data and preparing for another ...

Tar spot of corn has been confirmed in two northern Missouri counties: Holt County in northwestern Missouri and Marion County in northeastern Missouri, as well as in six counties in central Iowa and ...

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, ...

Indiana, tar spot has been an annual concern since 2018 when growers experienced 20-60 bu/A loss. This past season favorable weather conditions led to another severe epidemic where there are reports ...