Plant at the optimum time for a specific variety. Avoid extremely early planting. Fungicide use The recommended labeled fungicides and rates for sheath blight control are listed in Table 3. Fungicide choice depends on severity of infection, fungicide cost and the presence of other diseases such as blast. Use the most effective fungicide for sheath blight control at the first and second application if sheath blight is the only disease present.
Timing is essential for best fungicide effectiveness.
Earlier or later applications will not give effective sheath blight control. Fungicides, application rates and timing for sheath blight and blast control. Labeled fungicides can be applied as a tank mix with N solution to save an aerial application cost. However, timing of either the N or the fungicide application should not be compromised just to save cost. The suggested procedure is to determine the time to apply midseason N by either the DD50 prediction schedule or by examining internode elongation.