What’s the best fungicide to combat southern rust

See the 2nd page of this article for fungicide results on this and other popular corn diseases

https://www.extension.purdue.edu/extmedia/BP/BP-160-W.pdf.

Vt - R3 is best timing. No benefit after R3. Hope it's helpful.

I have had good luck with trivapro as a preventative - it seems to have a longer residual period than others. I have also used generics like a mix of tigris azoxy + tebucon and have had good results preventing southern rust.

Trivapro