PASTURE/RANGELAND - BRUSH CONTROL
Velpar DF VU Herbicide is a water-dispersible granule that is mixed in water and applied as a spray for weed control in Christmas trees, forestry site preparation and release areas, and industrial areas. It may also be applied as a basal soil treatment for brush control in reforestation areas, rangeland, pastures, and noncrop areas.
Velpar DF VU Herbicide is an effective general herbicide providing both contact and residual control of many annual and biennial weeds and woody plants. It is also effective for control of most perennial weeds.
Velpar DF VU Herbicide is noncorrosive to equipment.
Care must be exercised when applying Velpar DF VU Herbicide near desirable trees or shrubs as they can absorb Velpar DF VU Herbicide through roots extending in to treated areas.
This product may be applied on agricultural and non-agricultural sites that contain areas of temporary surface water caused by collection of water between planting beds, in equipment ruts, or in other depressions created by management activities. It is permissible to treat intermittent drainage, intermittently flooded low lying sites, seasonally dry flood plains, and transitional areas between upland and lowland sites when no water is present. It is also permissible to treat marshes, swamps, and bogs after water has receded, as well as seasonally dry flood deltas. DO NOT make applications to natural or man-made bodies of water such as lakes, reservoirs, ponds, streams, and canals.
ENVIRONMENTAL CONDITIONS AND BIOLOGICAL ACTIVITY
Velpar DF VU Herbicide is absorbed through the roots and foliage. Moisture is required to activate Velpar DF VU Herbicide in the soil. Best results are obtained when the soil is moist at the time of application and 1/4-1/2 inches of rainfall occurs within 2 weeks after application.
For best results, apply Velpar DF VU Herbicide preemergence or postemergence when weeds are less than 2 inches in height or diameter. Herbicidal activity is most effective under conditions of high temperature (above 80 °F), high humidity, and good soil moisture. Herbicidal activity may be reduced when vegetation is dormant, semi-dormant, or under stress (e.g. temperature or moisture).
Herbicidal activity will usually appear within 2 weeks after application to susceptible plants under warm, humid conditions; while 4--6 weeks may be required when weather is cool or dry, or when susceptible plants are under stress. If rainfall after application is inadequate to activate Velpar DF VU Herbicide in the soil, plants may recover from contact effects and continue to grow.
On woody plants, symptoms usually appear within 3-6 weeks after sufficient rainfall has carried the herbicide into the root zone during periods of active growth. Defoliation and subsequent refoliation may occur, but susceptible plants are killed.
The degree and duration of control will depend on the following:
- Use rate
- Weed spectrum and size at time of application
- Environmental conditions at and following treatment
Where a rate range is shown, use the higher levels of the dosage range on hard-to-control species, fine-textured soils, or soils containing greater than 5% organic matter or carbon. Use the lower levels of the dosage range on coarse-textured soils and/or on soils low in organic matter. Refer to specific uses for rate ranges.
Velpar DF VU Herbicide may be applied by ground equipment and, where permitted, aerial equipment. Use rates, minimum spray gallonage, and other application information are described for various uses.
Dispose of the equipment washwater by applying it to a use-site listed on this label or in accordance with directions given in the "Storage and Disposal" section of this label.
Before spraying, calibrate equipment to determine the quantity of water necessary to uniformly and thoroughly cover the vegetation and soil in a measured area to be treated. Make sure the volume of water is sufficient to completely suspend the Velpar DF VU Herbicide.
Velpar DF VU Herbicide may be tank mixed with other herbicides and /or adjuvants registered for the uses specified in the label. Refer to the label of the tank mix partner(s) for any additional use instructions or restrictions. The most restrictive label provisions apply. If other label instructions conflict with this label do not tank mix the herbicide and/or adjuvant with Velpar DF VU Herbicide.
INVASIVE SPECIES MANAGEMENT
This product may be considered for use on public, private, and tribal lands to treat certain weed species infestations that have been determined to be invasive, consistent with the Federal Interagency Committee for the Management of Noxious and Exotic Weeds (FICMNEW) National Early Detection and Rapid Response (EDRR) System for invasive plants. Effective EDRR systems address invasions by eradicating the invader where possible, and controlling them when the invasive species is too established to be feasibly eradicated. Once an EDRR assessment has been completed and action is advised, a Rapid Response needs to be taken to quickly contain, deny reproduction, and if possible eliminate the invader. Consult your appropriate state extension service, forest service, or regional multidisciplinary invasive species management coordination team to determine the appropriate Rapid Response provisions and allowed treatments in your area.
Velpar DF VU Herbicide, which contains the active ingredient hexazinone, is a Group 5 herbicide based on the mode of action classification system of the Weed Science Society of America.
When herbicides with mode of action classifications that affect the same biological sites of action are used repeatedly over several years to control the same weed species in the same treatment area, naturally-occurring resistant biotypes may survive a correctly applied herbicide treatment, propagate, and become dominant in that area.
Adequate control of these resistant weed biotypes cannot be expected. If weed control is unsatisfactory, it may be necessary to retreat the problem area using a product affecting a different biological site of action.
To better manage herbicide resistance through delaying the proliferation and possible dominance of herbicide resistant weed biotypes, it may be necessary to change cultural practices within and between crop seasons such as using a combination of tillage, retreatment, tank-mix partners and/or sequential herbicide applications that have a different site of action. Weed escapes that are allowed to go to seed will promote the spread of resistant biotypes.
It is advisable to keep accurate records of pesticides applied to individual fields to help obtain information on the spread and dispersal of resistant biotypes. Consult your agricultural dealer, consultant, applicator, and/or appropriate state agricultural extension service representative for specific alternative cultural practices or herbicide instructions available in your area.
INTEGRATED PEST MANAGEMENT
This product may be used as part of an Integrated Pest Management (IPM) program that can include biological, cultural, and genetic practices aimed at preventing economic pest damage. IPM principles and practices include field scouting or other detection methods, correct target pest identification, population monitoring, and treating when target pest populations reach locally determined action thresholds. Consult your state cooperative extension service, professional consultants, or other qualified authorities to determine appropriate action treatment threshold levels for treating specific pest/crop systems in your area.
PASTURE/RANGELAND BRUSH CONTROL
Velpar DF VU Herbicide may be used either broadcast or as a basal-soil treatment for the control of undesirable brush in pasture or rangeland.
Apply Velpar DF VU Herbicide from late winter through summer, pre-budbreak until new growth hardens off.
In areas where the soil remains frozen during the winter and spring rains are usually inadequate for soil activation, a fall or winter treatment may be applied before the soil freezes.
For broadcast rates needed to control the species below, see the Forestry - Release, Use Rates section.
Chinaberry, Dogwood flowering, Sassafras: Suppression- a visible reduction in plant population and/or plant vigor as compared to an untreated area and generally not accepted as control.
SPRAY EQUIPMENT AND APPLICATION TECHNIQUES
Basal (Soil)-Mix 2 2/3 pounds of Velpar DF VU Herbicide with sufficient water to make one gallon of suspension and thoroughly agitate. Apply the Velpar DF VU Herbicide suspension with an exact-delivery handgun applicator. This equipment delivers a thin stream of predetermined volume when triggered. Apply the Velpar DF VU Herbicide suspension at the rate of 2 to 4 ml for each inch of stem diameter at breast height. Direct the treatment to soil within 3 inches of the root collar of woody plants to be controlled. When treating large stems and when more than one delivery of the Velpar DF VU Herbicide suspension is needed per stem, make applications on opposite sides of the stem. Do not apply more than 1/3 gallon of the Velpar DF VU Herbicide suspension per acre per year. Intermittent agitation may be required to maintain the Velpar DF VU Herbicide in suspension.
USE PRECAUTIONS FOR PASTURE/RANGELAND
- Injury to or loss of desirable trees or other plants may result if Velpar DF VU Herbicide is applied or if equipment is drained or flushed on or near desirable trees or other plants, on areas where their roots may extend, or in locations where the chemical may be washed or moved into contact with their roots.
- Poor weed and brush control may result from the following:
-Use on poorly drained sites
-Applications made when the soil is saturated with water and rain is imminent within 24 hours
-Applications to soils high in organic matter (greater than 5%)
- Following mechanical cutting or clearing, allow stumps and injured trees sufficient time to adequately resprout before applying Velpar DF VU Herbicide.
- Leave treated soil undisturbed to reduce the potential for Velpar DF VU Herbicide movement by soil erosion due to wind or water.
- Weed and brush control results depend on sufficient moisture to activate Velpar DF VU Herbicide.
USE RESTRICTIONS FOR PASTURE/RANGELAND
- Do not use Velpar DF VU Herbicide on frozen soils.
- When Velpar DF VU Herbicide is applied as a basal soil treatment, there is no restriction on grazing by domestic animals nor on cutting surrounding vegetation for forage or hay.
- Livestock may be grazed immediately following a broadcast application of Velpar DF VU Herbicide at rates of 1.5 pounds per acre or less, and treated vegetation may be cut, dried, and fed after 38 days.
- Do not cut treated vegetation for feed, or graze livestock on treated areas for 60 days following application of Velpar DF VU Herbicide at broadcast rates exceeding 1.5 pounds per acre.