"Rust is a common fungal disease found on most species of grasses around World. Rust can be found early spring through fall depending on the location. Yellow flecks on the leaf blades are the first signs of rust disease on turfgrass. The yellow flecks enlarge which cause the leaf epidermis to rupture and release yellow-orange powdery spores. These fungal spores easily get on shoes, mowers, and pets but are not harmful to humans or animals."https://turfdisease.osu.edu/news/rust-turfgrass
Les Fletcher ● 1888d