The cornfields of Missouri and Illinois are once again in fungal crosshairs. Southern rust—fast, orange, and ruthless—teams up with tar spot’s stealthy black lesions to threaten millions of bushels. Together, they can strip photosynthetic power, shut down grain fill, and leave farmers staring at half-empty combines. Integrated defense—early scouting, resistant hybrids, and precision fungicide timing—is the only way to keep the harvest intact. Ignore the signs, and the spores will write the ending for you.