The Heat Is Here. What Is It Doing to Your Corn? | Virtual Agronomist

What happens to corn when temperatures climb into the 90s and nighttime temperatures stay above 70 degrees? In this episode of the Landus Virtual Agronomist, Technical Agronomist Dan Bjorklund scouts corn fields across Iowa to look at how extreme summer heat and warm nights can impact corn during a critical stage of development. Dan explains why high nighttime temperatures can increase stress on the corn plant, what that could mean for yield potential, and how protecting plant health can help crops handle challenging weather conditions. While scouting fields in Black Hawk County and near Washington, Iowa, Dan also identifies bacterial leaf streak and Physoderma brown spot and explains how to distinguish these diseases from other concerns, including southern rust. He also discusses when Physoderma brown spot can become a stalk-quality concern and what growers should be watching for as the season progresses. With hot weather in the forecast and corn entering critical reproductive stages, now is the time to scout fields, understand what is happening in the canopy, and make informed decisions about fungicide applications and plant health. In this episode: • How temperatures in the 90s affect corn • Why warm nighttime temperatures can increase crop stress • What Dan is finding while scouting Iowa corn fields • Bacterial leaf streak and Physoderma brown spot identification • How to avoid mistaking other diseases for southern rust • The role of fungicide in protecting plant health during heat stress We can’t control the weather, but we can help our crops respond to it. Subscribe for more in-field agronomy updates from the Landus Virtual Agronomist. #Corn #Agronomy #CropScouting #CornDisease #Fungicide #IowaAgriculture