Abstract: The rust of Zoysia tenufolia overwinters mainly in form of hyphae in the leaves which do not through winter. The urediospores developed by the hyphae next year are the main primary inocula of the disease. The incubation period of the disease is 7 to 12 days under the temperature from 20℃ to 35℃ , and only 7 to 9 days under 25℃. The peak period of the disease varies with the time when the lawn is set up and the amount of the overwintered pathogen, and appears generally between May and September. The result of the control test shows that triadimefon is very effective to control the rust of Zoysia tenufolia.