Fontanelle, IA | wnjr8284 - 1/24/2026 11:32
Cold winter temperatures will likely reduce some, but not all, pathogens for Iowa’s 2026 corn crop. While extreme cold temperatures below 0 F can decrease survival rates for certain diseases and insects like rootworm eggs, many pathogens, including those causing tar spot, can survive.
Southern Rust: Arctic cold waves are highly effective at reducing the survival of this fungus.
Tar Spot: This disease is hardy and capable of surviving cold winter conditions to infect crops the following season.
Corn Rootworm: Although adapted to cold weeks of sustained temperatures between can significantly reduce egg hatch, according to studies cited by Iowa State University.
So you’re saying all the ice and snow and cold and misery in the winter snowbird belt right now is a good thing? |
Any chance you change fungicide timing applications next year?
