we sodded the yard with zoysia a couple years ago and have loved it.
this year it has some problems. i think one might be a fungus and have been treating that and the other is something black and sorta dusty looking. ive nev er seen this before. anyone know what it is and how to treat it? are products made for st agustine ok to put on zoysia
thanks so much

Typically I've seen zoysia falls into products safe for bermuda, fescue, and bluegrass rather than products for St Augustine & centipede. But that's not a rule, just an observation. The product label should clearly say if it is or isn't for use on zoysia. It is a pretty common turf so I see no reason why it shouldn't be on the label.