By Anne Dorrance and Pierce Paul, Ohio State University Extension
There have been several calls this past week for fungicide applications on corn and soybean at all different growth stages. So let’s review what might be at stake here.
Frogeye leaf spot and white mold on susceptible varieties when the environment is favorable for disease easily pay the cost of application plus save yield losses. Let’s dig a bit deeper. Both of these diseases are caused by fungi but frogeye leaf spot is a polycyclic disease, meaning that multiple infections occur on new leaves through the season while white mold is monocyclic and the plant is really only susceptible during the flowering stage. Both of these diseases are also limited geographically in the state. White mold is favored in northeast Ohio and down through the central region where fields are smaller and air flow can be an issue. Frogeye has been found on highly susceptible varieties south of 70, but it is moving a bit north, so it is one that I am watching.… Continue readingRead More »