Smith-Kerns and korai

Yesterday I saw some dollar spot on a korai (Zoysia matrella) fairway in Kyushu, Japan. I wondered what the Smith-Kerns model probability for dollar spot had been.

dollar spot on a korai fairway in kyushu

So I looked up the recent temperature and humidity at a nearby weather station.

dollar spot probability by the smith-kerns model, march 1 to june 15 at Iizuka, Japan