FOR CONTROL OF UNDESIRABLE WEEDS UNDER PAVED SURFACES
TVC is an aqueous solution intended to be mixed with water and surfactant(s) for application to non-cropland areas such as railroad, utility, pipeline and highway rights-of-way, utility plant sites, petroleum tank farms, pumping installations, fence rows, storage areas, non-irrigation ditchbanks, including grazed or hayed areas within these sites. TVC is also recommended for the release of unimproved Bermudagrass and Bahiagrass. It may also be used beneath certain paved surfaces. Additionally, TVC may be used on grass pastures and rangeland, as well as for establishing and maintaining wildlife openings.
When applied either preemergence or postemeregence to weeds, TVC will control most annual and perennial grasses and broadleaf weeds in addition to many brush and vine species. TVC will provide residual control of labeled weeds which germinate in the treated areas. Postemeregence application with a surfactant is the method of choice in most situations, particularly for perennial weeds. For maximum affect, weeds should be growing vigorously at postemeregence application and the spray solution should include a surfactant (See ADJUVANT Section for recommendations). TVC solutions may be broadcast by using ground or aerial equipment, or may be applied as a spot treatment by using low-volume techniques. In addition, TVC may be used for stump and cut stem treatments.
TVC controls vegetation by absorption through leaves, stems, and roots, from which it is translocated throughout the plant, where it accumulates in rapidly-growing meristematic tissue. Treated plants stop growing soon after treatment. Chlorosis (yellowing of plant tissue) first appears in the newest leaves and necrosis spreads from this point. In perennials, TVC is translocated into and kills underground storage tissues to prevent regrowth. Chlorosis and tissue necrosis may not be apparent in some plant species until two weeks after application. Complete kill of plants may not occur for several weeks. Applications of TVC are rain-fast one hour after treatment.
When applying TVC as a tank mix, follow the more restrictive directions and restrictions on the labels for all products used. Do not tank mix TVC with any product that prohibits such mixing.
PRECAUTIONS FOR AVOIDING INJURY TO NON-TARGET PLANTS
TVC can occasionally affect non-target or untreated plants by root uptake of the herbicide. Injury or loss of non-target plants may result if TVC is applied onto or near desirable plants, or to areas where their roots extend, or in areas where treated soil may be washed or moved within their drip line.
DO NOT use on food crops. DO NOT treat irrigation ditches or water used for irrigation of crops or for domestic purposes. Keep away from fertilizers, insecticides, fungicides and seeds. DO NOT drain or flush equipment on or near desirable plants, or onto areas where their roots may extend, or in locations where the chemical may be washed or moved within their drip line. DO NOT use on lawns, walks, driveways, tennis courts or similar areas where roots of desirable vegetation may extend and be exposed to potential injury and/or mortality from root uptake of TVC. DO NOT side trim desirable vegetation with this product unless severe injury or plant death is acceptable. Exercise precautions to prevent spray drift onto desirable plants.
Clean application equipment immediately after using this product by thoroughly flushing with water.
For optimal postemeregence performance of TVC, the addition of an adjuvant to the spray solution is essential to aid in the deposition and uptake of the herbicide.
Nonionic Surfactants: Use a nonionic surfactant at 0.25% to 1% of the total spray volume (0.25% v/v is equivalent to 1 quart in 100 gallons) in accordance with the surfactant labeling. For best results, select a nonionic surfactant with a HLB (hydrophilic to lipophilic balance) ratio between 12 and 17 with at least 70% surfactant in the formulated product. Alcohols, fatty acids, horticultural spray oils, ethylene glycol or diethylene glycol should not be considered as surfactants to meet these requirements.
Methylated Seed Oils or Vegetable Oil Concentrates: Methylated seed oil or vegetable oil concentrate may be used at 1.5 to 2 pints per acre. When using spray volumes greater than 30 gallons per acre, mix methylated seed oil or vegetable oil concentrate at a rate of 1% of the total spray volume.
Silicone-Based Surfactants: Silicone-based surfactants allow greater spreading of the spray droplet on the leaf surface, as compared to conventional nonionic surfactants. However, some silicone-based surfactants may dry too quickly and limit herbicide uptake. Refer to the surfactant manufacturer’s label for specific recommendations.
Fertilizer/Surfactant Blends: Nitrogen-based liquid fertilizers such as 28% N, 32% N, 10-34-0 or ammonium sulfate may be used with TVC at 2 to 3 pints per acre in combination with the recommended rate of nonionic surfactant, methylated seed oil or vegetable oil concentrate. Tank mixes with nitrogen-based fertilizers without a nonionic surfactant, methylated seed oil or vegetable oil concentrate is not recommended.
Exercise all precautions to minimize or eliminate spray drift. Fixed wing aircraft and helicopters can be used to apply TVC; however, DO NOT apply by fixed wing aircraft unless appropriate buffer zones can be maintained to prevent spray drift out of the target area or, if treating open tracts of land where spray drift from fixed wing aircraft application can be tolerated. Aerial equipment designed to minimize spray drift, such as helicopters equipped with a Microfoil boom, Thru-Valve boom or raindrop nozzles, must be used and calibrated. Unless applying with a Microfoil boom, use a drift control agent at the recommended label rate. To avoid drift, DO NOT make applications during inversion conditions, when winds are gusty, or during any other conditions that promote spray drift. Side trimming is not recommended with TVC unless death of treated vegetation is acceptable.
Uniformly apply TVC in 5 to 30 gallons of water per acre. Use a nonionic surfactant, methylated seed oil or silicone-based surfactant (See the Adjuvant section of the label for specific recommendations). An anti-foam agent may be added, if needed.
Thoroughly clean application equipment, including landing gear, by thoroughly flushing with water immediately after using this product. Prolonged exposure of uncoated/unpainted steel (except stainless steel) surfaces to this product may result in corrosion and failure of the exposed part. Maintaining painted surfaces may prevent corrosion.
To minimize spray drift, select proper nozzles to avoid spraying a fine mist, use pressures less than 50 psi and DO NOT spray under gusty or windy conditions (also refer to SPRAY DRIFT MANAGEMENT section). Use an anti-foam agent, if needed, and a spray pattern indicator, if desired. Thoroughly clean application equipment after using this product by thoroughly flushing with water. Prolonged exposure of uncoated/unpainted steel (except stainless steel) surfaces to this product may result in corrosion and failure of the exposed part.
When making applications to rights-of-way corridors where roots of desirable vegetation may extend, apply 1 to 3 pints of TVC per acre in combination with recommended tank-mixes. It is not recommended to use rates higher than 3 pints per acre in such situations as injury or death of desirable vegetation may occur.
Side Trimming: DO NOT side trim with TVC unless severe injury or death of the treated vegetation is acceptable. TVC is readily translocated and can result in death of the entire tree.
Low Volume: Use equipment calibrated to deliver 5 to 20 gallons of spray solution per acre. Thoroughly mix 0.5 to 5% (v/v) TVC in water plus surfactant (See the Adjuvant section of the label for recommendations). Use an anti-foam agent at the recommended rate, if needed. For difficult to control brush species (See Weeds Controlled section for relative susceptibility of weed species), apply the higher concentrations of herbicide and/or spray volumes but DO NOT apply more than 6 pints of TVC per acre. Excessive wetting of foliage is not recommended. See the Mixing Guide table in the label for suggested volumes of TVC and water.
Application Tips: For low volume applications, select appropriate nozzles to avoid over-application. Proper application is critical to ensure desirable results. Optimum results are achieved when the spray covers the crown and approximately 70 percent of the plant. The use of a flat fan nozzle tip with a spray angle of 40 degrees or less will aid in proper deposition.
Recommended nozzle tip sizes include 4004E or 1504E. For a straight stream and cone pattern, use adjustable cone nozzles such as 5500 X3 or 5500 X4. Attaching a roll-over valve onto a Spraying Systems Model 30 gunjet or other similar spray guns allows for the use of both a flat fan and cone tips on the same gun.
Proper Spray Pattern: Moisten, but DO NOT drench target vegetation. DO NOT spray to run-off.
Low Volume with Backpacks: For brush up to 4 feet tall, spray downward to cover approximately 70% of the plant foliage and the crown.
For brush 4 to 8 feet tall, apply a directed spray in a smooth vertical motion from the crown upward on at least two sides of the target vegetation, making sure to cover the crown whenever possible.
For brush over 8 feet tall, apply a directed spray in a smooth zig-zag motion from the crown upward on at least two sides of the target brush.
Low Volume with Hydraulic Handgun Application Equipment: Use same technique as described above for Low Volume with Backpacks.
For broadcast applications, simulate a gentle rain near the top of target vegetation, allowing spray to penetrate the target foliage and contact the crown without run-off onto understory vegetation. DO NOT spray to run-off. Herbicide spray that contacts understory vegetation may result in severe injury or death of understory plants.
High Volumes: For optimum performance when spraying medium to high density brush, use equipment calibrated to deliver up to 100 gallons of finished spray per acre (GPA). Application volumes exceeding 100 GPA may result in excessive spray run-off, causing injury to desirable ground cover species. Thoroughly mix TVC at 2 to 6 pints per acre in water and include a surfactant (See ADJUVANT section for surfactant recommendations). Use an anti-foam agent according to its label, if needed. For hard-to-control species (See Weeds Controlled section for relative susceptibility of weeds), use the higher concentrations of herbicide and/or spray volumes but DO NOT apply more than 6 pints of TVC per acre. Uniformly cover the foliage of the target vegetation but DO NOT apply to run-off.
TVC can be applied as an invert emulsion (water-in-oil emulsion) to minimize spray drift and spray run-off, thereby delivering more herbicide to the target foliage. The spray emulsion may be formed in a single tank (batch mixing) or injected (in-line mixing). Refer to the invert chemical label for proper mixing directions.
INSTRUCTIONS FOR RANGELAND USE
TVC may be applied to rangeland for controlling undesirable vegetation to achieve one or more of the following vegetation management objectives:
1. To control undesirable (non-native, invasive and noxious) plant species.
2. To control undesirable vegetation to aid in establishing desirable rangeland plant species.
3. To control undesirable vegetation to aid in establishing desirable rangeland vegetation following a fire.
4. To control undesirable vegetation for wildfire fuel reduction.
5. To release existing desirable rangeland plant communities from the competitive pressure of undesirable plant species.
6. To control undesirable vegetation for wildlife habitat improvement.
To ensure the protection of threatened and endangered plants when applying TVC to rangeland:
1. Federal agencies must follow NEPA regulations.
2. State agencies must work with the Fish and Wildlife Service or its designated state conservation agencies.
3. Other organizations or individuals must operate under a Habitat Conservation Plan if threatened or endangered plants are known to be present in the area to be treated.
See the appropriate section(s) of the label for specific use directions for the desired rangeland vegetation management objective.
TVC should only be applied to rangeland as specific weed problems arise. Long term control of undesirable weed species ultimately depends on successful land management practices that promote the growth and sustainability of desirable rangeland plant species.
Grazing and haying restrictions: There are no grazing restrictions following TVC application. DO NOT cut forage grass for hay for seven days after TVC application.
FOR CONTROL OF UNDESIRABLE WEEDS UNDER PAVED SURFACES
TVC can be used under asphalt, pond liners and other paved areas, but ONLY in industrial sites or where the pavement has a suitable barrier along the perimeter that prevents encroachment of roots from desirable plants.
TVC should only be used where the area to be treated has been prepared according to good construction practices. Before application of TVC, rhizomes, stolons, tubers or vegetative plant parts should be removed from the treatment site by scalping with a grader blade to a depth sufficient to insure their complete removal.
IMPORTANT: Paving should follow TVC applications as soon as possible. DO NOT apply where the chemical may contact the roots of desirable trees or other plants.
This product is not recommended for use under pavement on residential properties such as driveways or parking lots, nor in recreational areas such as under bike or jogging paths, golf cart paths, tennis courts, or where landscape plantings could be anticipated. Injury or death of desirable plants may result if this product is applied where roots are present or where they may extend into the treated area. NOTE that roots of trees and shrubs may extend a considerable distance beyond the branch extremities; i.e., drip line.
APPLICATION DIRECTIONS FOR PAVED SURFACES:
Applications should be made to the soil surface only when final grade is established. DO NOT move soil following TVC application.
Apply TVC in at least 100 gal. water per acre to ensure thorough and uniform wetting of the soil surface, including the shoulder areas. Prepare spray solution by thoroughly mixing TVC at 6 pints per acre (2.2 fluid ounce per 1000 square feet) into clean water in the spray tank
If the soil is not moist before treatment, TVC should be incorporated into the soil to a depth of 4 to 6 inches using a roto-tiller or disc. Rainfall or irrigation of 1 inch will also provide uniform incorporation. DO NOT allow treated soil to wash or move from treated areas into untreated areas.