Several amendments to the Revolver label have been approved by the Environmental Protection Agency, including addition of buffalograss and warm-season turf varieties tolerant to Revolver, a postemergent herbicide.
Tolerant warm-season cultivars added to the label include Champion, Mini Verdi, seeded Princess and seeded Riviera varieties, as well as the zoysiagrass varieties Emerald and seeded Champion, according to Don Myers, herbicide product development manager for Bayer Environmental Science. “For best results, treatments should occur when the average daily temperature is above 70 degrees Fahrenheit to control mature weeds,” Myers says.
As a spot treatment, Revolver may now be applied at proportions from 0.5 to 2 fluid ounces of water, based on the weed and its stage of growth. Revolver may also be applied to bermudagrass up to one week before overseeding with perennial ryegrass and up to one day before overseeding with Poa trivialis.
The label now specifies that application of Revolver to sprigged bermudagrass may be made no sooner than two weeks after sprigging. Application to seeded zoysiagrass may be made up to one week before seeding. In addition, the label has been amended to include increased rates for control of volunteer ryegrass, tall fescue and other cool season grasses. These rates have changed from 0.2-0.6 to 0.1-0.8 ounces of Revolver per 1,000 square feet.