Midwest forage specialists are warning livestock producers about ergot infestations in pastures. This can cause severe illness or death in cattle. Ergot is a toxic fungus that infects seed heads of grasses and some cereal grains.

University of Missouri Extension specialists emphasize the heightened risk during hot weather. Cool-season grasses that have already been harvested for hay are not vulnerable, as they won’t regrow seed heads. Early hay harvests help prevent ergot contamination.

Despite reduced hay demand due to a plentiful first cutting and rain delays, specialists urge producers to mow any remaining tall fescue pastures. Even if the hay quality is lower, cutting the fescue will prevent ergot spread.

Mowing and baling help drop and remove infected seed heads. Signs of ergot infection in plants include yellow “honeydew” and hardened black ergot bodies that resemble mouse droppings.

Livestock symptoms include lameness, hoof damage, hair loss, and reduced appetite. They are similar to fescue toxicosis. Infected animals seek shade or water. Farmers should remove livestock from infested areas and avoid feeding ergot-contaminated hay. Regular pasture inspections are essential.

Read more about the Midwest ergot infestations here.