Is it wise to tank mix fungicide with your herbicide or plant growth regulator?

The short answer is: NO

While tank mixing fungicide with herbicide is considered a convenient, one-pass operation for weed and disease management by some; previous studies generally suggest that fungicide applications at herbicide timings do not result in a yield benefit.

Dig into this article to find out why applying a fungicide at herbicide/PGR timing is not recommended.