Q.Pink Muhly grass has white fuzz along stalks. Is this a fungus and how do i treat it?
Plants were planted one year ago in central FL.

I'm sorry, I forgot the link to Clemson's article. Here it is: https://hgic.clemson.edu/muhly-grass-mealybug/?message=helpful&outcome=success

I think you have a mealybug infestation. Attached is a link to a Clemson Univ. article on pests of muhly grass. The included picture looks a lot like your plant. Unfortunately, no one knows yet the best way to many the infestation. Clemson asks for your help in researching what works and what doesn't. Unfortunately, that leaves you on your own. Options I would consider are pesticides rated for mealybugs and cutting the plant all the way down and disposing of the refuse. For good measure, blast it with the hose after cutting it down to dislodge low-lying mealybugs. Good luck!