Tar spot, a fungal disease that affects corn, has been discovered in 13 counties in Indiana, causing worry among farmers. Purdue field crop pathologist Darcy Telenko warns that the disease is showing up earlier this year, so farmers need to be vigilant.
Instead of rushing to spray fungicides, Telenko advises farmers to start scouting their fields. The disease might begin with just a few lesions in the lower canopy, but it can quickly worsen. When corn reaches the VT stage (tasseling and silk), it's the best time to apply fungicides for maximum effectiveness.
Taking action early is crucial because fungicides lose their effectiveness after a certain point. If the disease spreads to 5% or more of the upper canopy, controlling it with fungicides becomes difficult. Farmers must carefully monitor their fields and make informed decisions based on disease prevalence and the susceptibility of their corn hybrids.
The early appearance of tar spot in Indiana demands immediate attention. By closely monitoring fields and making timely decisions about fungicide application, farmers can protect their corn yields and minimize the impact of this destructive disease. Staying informed and proactive is key to safeguarding crops.
Photo Credit: gettyimages-chrisboswell
Categories: Indiana, Crops, Corn