F6285 4F CAL
F6285 4F CAL is a selective soil-applied herbicide for the control of susceptible broadleaf, grass and sedge weeds. F6285 4F CAL is formulated as a 4 pounds per gallon flowable containing the active ingredient, sulfentrazone. If adequate moisture (1/2" to 1") from rainfall or irrigation is not received within 7 to 10 days after the F6285 4F CAL treatment, a shallow incorporation may be needed to obtain desired weed control. When activating moisture is received after dry conditions, F6285 4F CAL will provide a reduced level of control of susceptible germinating weeds. Soil applications of F6285 4F CAL must be made before crop seed germination to prevent injury to the emerging crop seedlings. When applications after planting are delayed, injury may occur if seeds are germinating or if they are located near the soil surface
Observe all instructions, crop restrictions, mixing directions, application precautions, replanting directions, rotational crop guidelines and other label information of each product when tank mixing with F6285 4F CAL. Proper handling instructions: F6285 4F CAL may not be mixed or loaded within 50 feet of any wells (including abandoned wells and drainage wells), sinkholes, perennial or intermittent streams and rivers, and natural or impounded lakes and reservoirs. This setback does not apply to properly capped or plugged abandoned wells and does not apply to impervious pads or properly diked mixing/loading areas.
Operations that involve mixing, loading, rinsing, or washing of this product into or from pesticide handling or application equipment
or containers within 50 feet of any well are prohibited unless conducted on an impervious pad constructed to withstand the weight of
the heaviest load that may be positioned on or moved across the pad. Such a pad shall be designed and maintained to contain any
product spills or equipment leaks, container or equipment rinse or washwater, and rainwater that may fall on the pad. Surface water
shall not be allowed to either flow over or from the pad, which means the pad must be self-contained. The pad shall be sloped to facilitate material removal. An unroofed pad shall be of sufficient capacity to contain at a minimum 110% of the capacity of the largest pesticide container or application equipment on the pad. A pad that is covered by a roof of sufficient size to completely exclude precipitation from contact with the pad shall have a minimum containment capacity of 100% of the capacity of the largest pesticide container or application equipment on the pad. Containment capacities as described above shall be maintained at all times. The above specific minimum containment capacities do not apply to vehicles when delivering pesticide shipments to the mixing/loading site. States may have in effect additional requirements regarding wellhead setbacks and operational containment. Product must be used in a manner that will prevent back siphoning in wells, spills or improper disposal of excess pesticide, spray mixtures or rinsates.
F6285 4F CAL may be applied to soil as a preplant incorporated treatment or as a pre-emergence (prior to weed and/or crop emergence) surface application. Additional application methods include post-plant treatments, over-the-top and layby, in various crops. Application methods are defined in the following Crop Use Directions sections. Preplant incorporated treatments require a uniform surface application followed by incorporation. Do not incorporate to a depth greater than 2 inches which may result in poor weed control. Care must be taken not to create overlaps in treated zones due to soil movement, which will result in excessive F6285 4F CAL rates that could result in adverse crop response. All soil applications and the residual activity of post-plant applications of F6285 4F CAL require adequate moisture for herbicidal activation. The ultimate amount of moisture, whether supplied by rainfall or irrigation, is dependent on several factors. These factors include but are not limited to existing soil moisture at application, soil type, organic matter and tilth. In crop situations dependent on rainfall, F6285 4F CAL can await activating moisture for extended periods (10 to 14 days or longer) depending on the soil parameters described above. Once activated, F6285 4F CAL will provide activity on existing weeds. The level of activity will depend on the weed species and their size at time of activation. Where irrigation is not available and rainfall has not provided activation, particularly for surface applications of F6285 4F CAL, a shallow incorporation is recommended for destruction of any germinating weeds and to incorporate F6285 4F CAL. Herbicide incorporation will initiate the process of activation with existing soil moisture. In circumstances where prolonged periods without rainfall and/or irrigation is not possible, alternative or additional weed management practices (cultivation or post-applied herbicides) may be required.
Extreme care must be exercised and the Crop Specific Use Directions followed exactly in crops allowing post plant applications of
F6285 4F CAL. Over-the-top and lay-by applications will provide contact and residual weed control, depending on species. The addition of surfactants may increase contact weed control performance but may also increase the risk of adverse crop response as
Utilize a boom and nozzle sprayer equipped with the appropriate nozzles, spray tips and screens and adjusted to provide optimum spray distribution and coverage at the appropriate operating pressures. Utilize nozzles that produce minimal amounts of fine spray
droplets to avoid spray drift or inadequate foliar and/or soil coverage. Apply a minimum of 10 gallons of finished spray per acre by
ground. Be aware that overlaps and slower ground speeds while starting, stopping or turning while spraying may result in excessive
application and subsequent crop response. Do not apply when wind speed favors drift beyond the area intended for treatment.
Use nozzle types and arrangements that will provide optimum coverage while producing a minimal amount of fine droplets. Apply
sufficient spray volume to achieve adequate coverage. Apply a minimum of 5 gallons of finished spray per acre. Do not apply when wind speed favors drift beyond the area intended for treatment.
F6285 4F CAL may be applied through sprinkler irrigation systems including center pivot, lateral move, end tow, solid set, or hand
move irrigation systems. Do not apply this product through any other type of irrigation system. Do not connect any irrigation system
(including greenhouse systems) used for pesticide application to a public water system. Crop injury, lack of effectiveness or illegal residues on or in the crop can result from non-uniform distribution of treated water. If you have questions about calibration, you should contact State Extension Service specialists, equipment manufacturers, or other experts. A person knowledgeable of the chemigation system and responsible for its operation, or under the supervision of the responsible person, shall shut the system down and make necessary adjustments should the need arise.
It is important to note that irrigation with highly alkaline water (high pH) following a F6285 4F CAL soil application can also
significantly increase the amount of sulfentrazone available in soil solution. Irrigation with water having a pH greater than 7.5 could
result in adverse crop response. This response will ultimately depend on initial F6285 4F CAL application rate, application timing,
amount and pH of the irrigation water, and the sensitivity of the crop and the growth stage when irrigated. The risk of adverse crop
response will lessen with advancing growth stages of most crops.
The system must contain a functional check valve, vacuum relief valve, and low-pressure drain appropriately located on the
irrigation pipeline to prevent water source contamination from backflow. The pesticide injection pipeline must also contain a functional, automatic, quick-closing check valve to prevent the flow of fluid back toward the injection pump. The pesticide injection
pipeline must also contain a functional, normally closed, solenoid-operated valve located on the intake side of the injection pump
and connected to the system interlock to prevent fluid from being withdrawn from the supply tank when the irrigation system is either
automatically or manually shut down. The system must contain functional interlocking controls to automatically shut off the pesticide
injection pump when the water pump motor stops. The irrigation line or water pump must include a functional pressure switch,
which will stop the water pump motor when the water pressure decreases to the point where pesticide distribution is adversely
Systems must use a metering pump, such as a positive displacement injection pump (e.g., diaphragm pump) effectively designed
and constructed of materials that are compatible with pesticides and capable of being fitted with a system interlock.
F6285 4F CAL should be metered into the irrigation system continuously for the duration of the water application. F6285 4F CAL
should be diluted in sufficient volume to insure accurate application over the area to be treated. Use the appropriate amount of
water to carry the product to the soil surface. Continuous agitation is required to maintain product suspension in the solution tank.
A jar test should be conducted to ensure that phase separation would not occur during dilution and application. Failure to achieve a
uniform dilution throughout the time of application may result in undesirable residues or less than desirable weed control. Flush the
lines at the completion of the application and then turn the water off promptly.
When using water from public water systems; DO NOT APPLY F6285 4F CAL THROUGH ANY IRRIGATION SYSTEM
PHYSICALLY CONNECTED TO A PUBLIC WATER SYSTEM. Public water system means a system for the provision to the public of piped water for human consumption if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days of the year. F6285 4F CAL may be applied through irrigation systems, which may be supplied by a public water system only if water from the water system is discharged into a reservoir tank prior to pesticide introduction. There shall be a complete physical break (air gap) between the outlet end of the fill pipe and to top or overflow rim of the reservoir tank of at least twice the inside diameter of the fill pipe. Before beginning chemigation, always make sure that the air gap exists and that there is no blockage of the overflow of the reservoir tank.
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