Key Issues Perspective: White mold in fields almost permanent
Spidahl and Weber rely on experience to know that agronomic tactics alone are only going to help minimize white mold. “You are still not going to control the disease those ways. You have to incorporate fungicide into a management program to control white mold,” Weber said.
Ag-Tech commonly recommends a preventive application of Proline fungicide near the R1 soybean growth stage. And then Ag-Tech often custom applies Stratego YLD as a second fungicide application when soybeans are at pod fill or R3 stage of growth.
“When soybeans are about 10 to 20 percent flowering, the first fungicide application needs to be made,” Weber said. “The next 14 to 20 days will determine if you need a second fungicide application to help manage white mold. If after your first application it turns dry and hot for those 14 to 20 days, the likelihood of white mold will be dramatically reduced. On the opposite side, if it is cold and wet for those days, then you will need a follow up fungicide application.”