Arnold from Morrow writes
Depending on what you are trying to target the Fusilade II Herbicide is safe to be used on zoysia that is established whether it is actively growing or dormant. However, anything you may be trying to eliminate from the zoysia grass will likely not be affected by the Fusilade application if all of the plants are in a dormant state due to the time of year and ground temperatures. Fusilade is a post emergent herbicide and will only control grasses that are in a fully actively growing state. When you do apply the Fusilade, be sure to use a Non Ionic Surfactant for best results. Per the Fusilade Product Label for use on Zoysiagrass: Over-spray Zoysia: Application should be made at a rate of 3-4 fl oz/A with Fusilade II Turf and Ornamental Herbicide, and a nonionic surfactant. Applications should be made in late spring (around June 1) and repeated about every 28-30 days. Latesummer application can be reduced to 2-3 fl oz/A as bermudagrass is preparing for dormancy. During hot summer weather the rates could be increased to 4-5 fl oz/A. Note: The 5 fl oz rate could cause temporary turf discoloration.
Answer last updated on: 12/01/2015
