Every year, corn producers and crop advisers work to identify and manage crop diseases. Tar spot has been discovered in eastern Nebraska and is expected to continue moving west, with the potential to reduce yields by more than 50% in susceptible corn hybrids. The fungus that causes tar spot thrives in wet, cool conditions within the corn canopy, potentially worsening disease pressure in pivot-irrigated fields. This project monitors and documents tar spot across Nebraska, helps update the national distribution map and provides programming to raise awareness and guide management strategies. Monitoring disease pressure in the state helps protect Nebraska producers and supports greater production efficiency. An updated distribution map for tar spot is available here.