Round fungus spots attacking my Paphs. If some of you have insights on a durable solution.

[richgarrison]

Banrot is my goto.... includes both thiomyl and etridiazole... drench and spray...

 

[Ray]

I have used two - Inocucor Garden Solution, now sold as Synergro, I think, and Quantum-Total - but with good results and no negatives, other than the smell.