FOR CONTROL OF ANNUAL BLUEGRASS
Revolver Herbicide is a postemergent sulfonylurea herbicide for application as a foliar spray. Revolver Herbicide is intended for professional use on golf course turf, sports fields, commercial lawns, cemeteries, parks, campsites, recreational areas, home lawns, roadsides, school grounds, and sodfarms to control cool season grasses and weeds from tolerant grasses.
Weed growth ceases within hours after application. Symptoms progress from yellowing to necrosis generally resulting in eventual plant death within 1 - 4 weeks after application. The speed of symptom development varies with temperature and will be faster at warmer temperatures than cooler temperatures. For best results to control mature weeds, apply in spring or through fall when the daily average temperature is above 70 degrees.
Revolver Herbicide has been tested and can be used on the following warm season turfgrass cultivars.
Bermudagrass: Baby, Common, Champion, Mini Verdi, Princess (seeded), Riviera (seeded), Nu Mex Sahara (seeded), Savannah, Tifway 419,Tifgreen 328, Tifton 10, Tifsport, Tifdwarf, Tifeagle, Transcontinential, Vamont, Yukon (seeded).
Zoysiagrass: Cavalier, Companion (seeded), Crowne, DeAnza, El Toro, Emerald, Greg Norman, Jamar, Meyer, Palisades, Zenith (seeded), Zeon.
Buffalograss1: Buffalograss cultivars may be treated with Revolver Herbicide as a spot treatment only.
Other warm season turfgrass and their cultivars may be tolerant to Revolver Herbicide, however, tolerance testing must be done prior to use.
Cool season turfgrasses, such as Bentgrass, Ryegrass, Fescues, Annual Bluegrass, Roughstalk Bluegrass (Poa trivialis) and Kentucky Bluegrass are not tolerant to Revolver Herbicide.
SEEDING AND SPRIGGING INTERVALS
Perennial ryegrass – Revolver Herbicide may be applied to Bermudagrass up to 1 week prior to overseeding with perennial ryegrass without a significant reduction in ryegrass stand.
Poa trivialis – Revolver Herbicide may be applied to Bermudagrass up to 1 day prior to overseeding with Poa trivialis without a significant reduction in Poa trivialis stand.
Seeded Bermudagrass – Revolver Herbicide may be applied to Bermudagrass up to 1 week prior to seeding without a significant reduction in Bermudagrass stand. For newly established stands of Bermudagrass, do not apply Revolver Herbicide for at least 2 weeks after emergence since injury may result.
Sprigged Bermudagrass – Revolver Herbicide may be applied to sprigged Bermudagrass no sooner than 2 weeks after sprigging without a significant reduction in quality.
Seeded Zoysiagrass – Revolver Herbicide may be applied to zoysiagrass up to 1 week prior to seeding without a significant reduction in zoysiagrass stand. For newly established stands of zoysiagrass, do not apply Revolver Herbicide for at least 3 weeks after germination since injury may result.
USE OF REVOLVER HERBICIDE AROUND SENSITIVE GRASSES
Avoid tracking or movement after application of Revolver Herbicide to adjacent sensitive grasses such as bentgrass, ryegrass, and Poa trivialis.
- Allow an adequate buffer zone between sensitive grasses and the treated area. If uncertain about the size of the buffer, 15 feet is suggested.
- The product must dry on the leaf surface prior to allowing traffic on the treated area.
- Risk to sensitive grasses adjacent to Revolver Herbicide applications is decreased when the soil is at less than field capacity at application. Avoid application when heavy rain is imminent or when the soil is saturated.
- Revolver Herbicide is foliar absorbed; do not irrigate immediately after application.
However, for the next 2 mornings after application, if dew is present, irrigate lightly (0.1-0.2 inches) prior to allowing traffic (mowing, etc.) each day in the area. Avoid water runoff during these irrigation cycles.
1Revolver Herbicide is not registered in California for use on Buffalograss.
APPLICATION METHODS, MIXING, AND COMPATIBILITY
Uniform, thorough spray coverage is important to achieve consistent weed control. Select spray nozzles and pressure that deliver MEDIUM spray droplets as indicated in nozzle manufacturer’s catalogs and in accordance with ASAE Standard S-572. Nozzles that deliver COARSE spray droplets may be used to reduce spray drift provided spray volume per acre (GPA) is increased to maintain coverage of weeds.
Revolver Herbicide can be applied as a broadcast treatment in a minimum of 25 gallons of water per acre. For weed control in dense weed populations or under adverse growing conditions, use higher spray volumes up to 60 gallons per acre. Rates are listed in the Use Rate Table for Weed Control.
For hand held pump type sprayers, mix 0.5 to 2 fluid ounces of Revolver Herbicide per gallon of water, depending on the weed and stage of growth. Use the higher rate for the more difficult to control or larger weeds. Spray to wet. Do not apply beyond runoff.
SPRAY SOLUTION pH
The efficacy of Revolver Herbicide may be affected by the pH of the spray solution. A pH near 7 is ideal. If pH is less than 6, add a buffer.
RE-SUSPENDING SUSPENSION CONCENTRATE PRODUCTS IN SPRAY SOLUTION
Like other suspension concentrates, Revolver Herbicide will settle if left standing without agitation. If the spray solution is allowed to settle for one hour or more, re-agitate the spray solution.
ALS-resistance exists in some biotypes. These biotypes are not controlled by Revolver Herbicide. Consider using herbicides with other modes of action to control resistant species.
ANNUAL BLUEGRASS (Poa annua)
Revolver Herbicide may be used to control annual bluegrass. Revolver Herbicide controls existing annual bluegrass plants and does not control annual bluegrass that has not germinated. Higher labeled rates and air temperatures will result in quicker removal. For best results, make applications when the daily average temperature is above 60 degrees. Rates are listed in the Use Rate Table for Weed Control.
Non Overseeded warm season turfgrass
Revolver Herbicide may be used on desired turf that has not been overseeded with a cool season grass. Later germinating annual bluegrass will require additional applications.
Since Revolver Herbicide does not have significant preemergent weed control activity, applications can be made in conjunction with a preemergent such as Ronstar Herbicide to obtain pre and post activity. Always follow the most restrictive overseeding interval on the products used. Rates are listed in the Use Rate Table for Weed Control.
Overseeded warm season turfgrass
Revolver Herbicide may be used on Bermudagrass that is overseeded with a cool season grass (ryegrass and Poa trivialis, for example) to control annual bluegrass, provided that the application is made prior to overseeding (see seeding intervals above). Better annual bluegrass control may be achieved if the overseeding is later in the fall, since a greater percentage of annual bluegrass will have germinated. Use adequate spray volumes to assure contact with annual bluegrass plants, since seedlings are underneath the Bermudagrass canopy.
REVOLVER Herbicide should be applied at a rate of 0.1 to 0.8 ounces of product per 1000 sq. ft. Because REVOLVER Herbicide provides control of emerged weeds and has limited soil residual, sequential applications or residual tank mixtures may be required to control weeds emerging after application. Broadcast applications of REVOLVER Herbicide should not exceed a maximum of 1.25 ounces of product per 1000 sq. ft per use season. In case of spot treatments, do not apply more than 2 fl oz of Revolver Herbicide per 1000 sq ft and treat no more than 10,000 sq. ft per acre.
NOTE: Multiple applications may be required to control Goosegrass, large volunteer ryegrass, or where 0.1 oz rate is used.