Frogeye leaf spot from a west Tennessee soybean field has been confirmed as resistant to strobilurin fungicides, according to University of Tennessee Extension plant pathologist Melvin Newman.
Newman said a farmer in Lauderdale County called him this season after a second application of a strobilurin fungicide did not control frogeye leaf spot.
Newman said the farmer made both fungicide applications on the field at the proper time and rate. The soybean variety in the field was susceptible to the disease.
For more information, read Frogeye leaf spot confirmed resistant to fungicide.