COOL SEASON GRASSES - CONTROL OF PURPLE NUTSEDGE (SPLIT APPLICATION)
Turf Use Instructions
Dismiss turf herbicide is a selective post emergence herbicide which controls broadleaf weeds and sedges in established turf areas including, but not limited to, residential and institutional lawns, athletic fields, commercial sod farms, golf course fairways and golf course roughs.
Dismiss turf herbicide is formulated as a flowable (suspension concentrate) containing 4 lbs of active ingredient per gallon. The mode of action of Dismiss turf herbicide involves uptake by both weed roots and shoots.
MIXING WITH WATER
For best results, fill spray tank with one fourth of the volume of clean water needed for the area to be treated. Start the agitation system and add Dismiss turf herbicide to the tank. Make sure Dismiss turf herbicide is thoroughly mixed before application or before adding another product to the spray tank.
Power sprayers: Uniform and accurate spray coverage requires proper calibration and operation of spray equipment. The use of marker dyes or foams can improve application accuracy. Boom sprayers equipped with appropriate flat fan nozzles, tips and screens are ideal for broadcast applications. Power sprayers fitted with spray wand/gun may also be used for broadcast application after careful calibration by the applicator. Power sprayers fitted with spray wand/gun are suitable for spot treatments.
Hand operated sprayers: Backpack and compression sprayers are appropriate for small turfgrass areas and spot treatments. Wands fitted with a flat fan nozzle tip should be held stationary at the proper height during application. A side to side or swinging arm motion can result in uneven coverage.
Apply this product in a sufficient volume of carrier solution to provide a uniform spray distribution. Spray volumes of 20 – 175 gallons per acre (0.5 to 4.0 gal/1,000 sq ft) with spray pressures adjusted to 20 – 40 psi are appropriate. Apply the higher spray volumes for dense weed populations.
Weed Control in Turfgrasses
Use Precautions for Turf Use
This product may be used on seeded, sodded or sprigged turgrasses that are well established. First application of this product can be made following the second mowing providing the turfgrass has developed into a uniform stand with a good root system. Turfgrass injury could result from application of this product on turfgrass that is not well established or has been weakened by stresses such as unfavorable weather conditions, disease, chemical or mechanical influences.
When applied as directed under the conditions described, the following established turfgrasses are tolerant to Dismiss turf herbicide at the recommended use rates in a range from 0.125 to 0.375 lb a.i./acre (4 to 12 fl. oz/acre or 0.092 to 0.275 fl. oz./1,000 sq. ft).
Fescue, Fine; Fescue, Tall; Use of this product on certain cultivars of Chewings Fescue, Fine Fescue or Tall Fescue cultivars may result in undesirable injury.
Bluegrass, Rough: Dismiss Turf Herbicide application may cause temporary discoloration to exposed leaf surfaces on St. Augustinegrass and certain cultivars of zoysiagrass bahiagrass,.or rough bluegrass. Treated turfgrass will recover with new growth. Discolored leaf tissue will be removed with mowing. To reduce potential for discoloration, do not apply Dismiss Turf Herbicide on turfgrass that is weakened by weather, mechanical, chemical, disease or other related stress. Maintain proper cultural practices such as adequate moisture and fertility levels to promote healthy turf growth.
Dismiss Turf Herbicide has demonstrated tolerance on both cool and warm season turfgrasses. However, not all varieties have been evaluated. Turfgrass managers desiring to treat newly released varieties should first apply Dismiss Turf Herbicide to a small area prior to treatment of larger areas.
Application to reseeded, overseeded or sprigged areas:
Reseeding, overseeding or sprigging of treated areas within one (1) month after application of this product could inhibit the establishment of desirable turfgrasses. Overseeding of bermudagrass with perennial ryegrass at two (2) to four (4) weeks after an application can be done if slight injury to perennial ryegrass can be tolerated.
Best results are obtained for reseeding or overseeding when mechanical or power seeding equipment (slit seeders) are used to give good seed to soil contact and proper soil cultivation, irrigation and fertilization practices are followed.
This product may be applied to established sod. Allow sod to establish a good root system, a uniform stand and to fill in the exposed edges. It is recommended that sod be established for at least three (3) months before an application of Dismiss turf herbicide.
Do not apply this product within three (3) months of harvest.
Other Use Precautions:
Do not apply to golf course putting greens or tees.
Do not use on turfgrasses other than those listed on the label.
Do not apply with surfactants unless previous experience has demonstrated combinations with surfactant to be physically compatible and non-injurious to the grass type in question.
Do not graze or feed livestock forage cut from areas treated with Dismiss turf herbicide.
Do not apply directly to landscape ornamentals or ornamental beds.
Temporary turfgrass discoloration has been observed when Primo has been either tank-mixed or applied within 7 days of a Dismiss Turf Herbicide application. It is recommended that Primo applications be made 7 days prior to, or after Dismiss Turf Herbicide application to reduce risk of turfgrass discoloration.
POSTEMERGENCE CONTROL OF ANNUAL AND PERENNIAL SEDGES INCLUDING NUTSEDGES
Dismiss turf herbicide will control or suppress sedges (Table 2) when applied at a rate of 4 to 12 fl oz/acre (0.092 to 0.275 fl. oz./1,000 sq. ft.). Apply the highest rate consistent with the rate needed for turfgrass safety in Table 1. Rates lower than 12 fl oz/acre (0.275 fl. oz/1,000 sq. ft.) will generally control sedges for at least 60 days.
Good spray coverage is needed for optimum control of sedges. Temporary discoloration of some turfgrass species may result from use of surfactant. Use of surfactants is not recommended.
PURPLE NUTSEDGE; For optimum control of purple nutsedge, split applications are recommended (Table 3 of the label). Apply 4-8 ounces per acre as an initial application followed by a second application when evidence of actively growing purple nutsedge is visible. Do not exceed the maximum rate per acre based on turfgrass variety listed in Table 1 of the label; Tolerant grasses.
Split Application Rate Options
Cool Season Grasses excluding Bentgrass:
Option 1 (fl oz/ acre) - 4 oz followed by 4 oz 35 days after initial treatment
Option 2 (fl oz/ acre) - 6 oz followed by 2 oz 35 days after initial treatment