Jun 15, 2021 to Jun 17, 2021 There are mixed signals on when to apply fungicides. We normally target brown silk. Now some say spray earlier, especially for tar spot. We saw some tar spot late last year. We always sprayed later because we didn’t want to risk damaging kernel set. What do you recommend? The Indiana Certified Crop Adviser panel includes Betsy Bower, Ceres Solutions, Lafayette; Jamie Bultemeier, agronomist, A&L Great Lakes Lab, Fort Wayne; and Andy Like, farmer and CCA, Vincennes Bower: It depends on how the year develops. If we see good rainfall and an environment that supports disease infection and development, scout early and often. We certainly need to protect corn from gray leaf spot and northern corn leaf blight if we start to see them in the canopy. If it’s wet like 2019, strongly consider protecting corn from physoderma if a hybrid you’re growing is susceptible. In a wet year, you may need to apply a fungicide near R1 regarding grey leaf spot or northern corn leaf blight. You may need to spray as early as V7 or V8 for physoderma.