GENERAL DIRECTIONS FOR USE
When used in accordance with this label, Fierce Herbicide:
Provides residual control of susceptible weeds in soybean and fallow land.
Provides additional burndown activity when used as part of a burndown program in soybean and fallow land.
Can be used on farms for non-selective vegetation control to maintain bare ground non-crop areas that must be kept weed free. Moisture is necessary to activate Fierce Herbicide in soil for residual weed control. When adequate moisture is not received after a Fierce Herbicide application, weed residual control may be improved by irrigation with at least 1.25 cm of water. Dry weather following applications of Fierce Herbicide may reduce effectiveness. However, when adequate moisture is received after dry conditions, Fierce Herbicide will control susceptible germinating weeds. Fierce Herbicide may not control weeds that germinate after application but before an activating rainfall/irrigation or weeds that germinate through cracks resulting from dry soil.
Burndown Application (Spring or Fall)
Apply Fierce Herbicide as part of a burndown program to actively growing weeds. Applying Fierce Herbicide under conditions that do not promote active weed growth will reduce herbicide effectiveness. Do not apply Fierce Herbicide when weeds are under stress due to drought, excessive water, temperature extremes, disease or low humidity. Weeds under stress tend to become less susceptible to herbicidal action. Fierce Herbicide is most effective when applied under warm sunny conditions. Reduced residual weed control may occur when burndown applications are made to fields where heavy crop and/or weed residue exist.
Fierce Herbicide is rainfast one hour after application. Do not apply Fierce Herbicide if rain is expected within one hour of application or postemergence efficacy may be reduced.
Application of Fierce Herbicide to soils with high organic matter and/or high clay content may require higher dosages than soils with low organic matter and/or low clay content. Application to cloddy seedbeds can result in reduced weed control.
If the crop treated with Fierce Herbicide is lost due to a catastrophe, such as hail or other forms of inclement weather, soybeans can be replanted immediately, provided no more than 315 g/ha of Fierce Herbicide have been used on the lost crop. Crop injury may occur if these restrictions are not followed.
GENERAL USE PRECAUTIONS
Do not apply this product when weather conditions favor spray drift from treated areas.
Do not apply during low-level inversion conditions, including fog.
Do not graze treated fields or feed treated forage or hay to livestock.
Do not apply by air.
Do not apply to frozen or snow covered soil.
Mechanical incorporation into the soil will reduce residual weed control.
As this product is not registered for the control of pests in aquatic systems, DO NOT use to control aquatic pests.
DO NOT contaminate irrigation or drinking water supplies or aquatic habitats by cleaning of equipment or disposal of wastes.
Spray equipment used to apply Fierce Herbicide should not be used to apply other materials to any crop foliage, unless the proper cleanout procedure is followed. See “SPRAYER CLEANUP” for more information.
Before applying Fierce Herbicide, start with clean, well maintained application equipment. The spray tank, as well as all hoses and booms, must be cleaned to ensure no residue from the previous spraying operation remains in the sprayer. Some pesticides, including but not limited to, the sulfonylurea and phenoxy herbicides are active at very small amounts and can cause crop injury when applied to susceptible crops. The spray equipment must be cleaned according to the manufacturer's directions for the last product used before the equipment is used to apply Fierce Herbicide. If two or more products were tank mixed prior to Fierce Herbicide application, the most restrictive cleanup procedure should be followed.
1. Fill clean spray tank 1/2 to 2/3 of desired level with clean water.
2. To ensure a uniform spray mixture, pre-slurry the required amount of Fierce Herbicide with water prior to addition to the spray tank. Use a minimum of 3.8 litres (1 gallon) of water per 283 g (10 oz) of Fierce Herbicide.
3. While agitating, slowly add the pre-slurried Fierce Herbicide to the spray tank. Agitation should create a rippling or rolling action on the water surface.
4. If tank mixing Fierce Herbicide with other labeled herbicides, add water soluble bags first, followed by dry formulations, flowables, emulsifiable concentrates and then solutions. Prepare no more spray mixture than is required for the immediate spray operation.
5. Add any required adjuvants.
6. Fill spray tank to desired level with water. Agitation should continue until all spray solution has been applied.
7. Mix only the amount of spray solution that can be applied the day of mixing. Fierce Herbicide should be applied within 6 hours of mixing.
Fierce Herbicide is applied by ground. Application equipment should be clean and in good repair. Nozzles should be uniformly spaced on boom and frequently checked for accuracy. Apply Fierce Herbicide, and Fierce Herbicide tank mixes, with ground equipment using standard commercial sprayers equipped with flat fan (preplant or preemergence applications only) designed to deliver the desired spray pressure and spray volume.
Field sprayer application: DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) medium classification. Boom height must be 60 cm or less above the crop or ground.
CARRIER VOLUME AND SPRAY PRESSURE
Preemergence Application (Conventional Tillage):
To ensure uniform coverage, use 100 to 300 L of spray solution per hectare for conventional tillage applications. Nozzle selection should meet manufacturer's volume and pressure recommendations for preemergence herbicide application.
Burndown Application (Prior to Crop Emergence):
To ensure thorough coverage in burndown applications, use 150 to 600 L spray solution per hectare. Use 200 to 600 L per hectare if dense vegetation or heavy crop residue is present. Nozzle selection should meet manufacturer's volume and pressure recommendations for postemergence herbicide application. Do not use flood jet nozzles.
Spray equipment, including mixing vessels and nurse tanks, must be cleaned each day following Fierce Herbicide application. After Fierce Herbicide is applied, the following steps must be used to clean the spray equipment:
1. Completely drain the spray tank, rinse the sprayer thoroughly, including the inside and outside of the tank and all in-line screens.
2. Fill the spray tank with clean water and flush all hoses, booms, screens and nozzles.
3. Top off tank, add 3.8 litres of 3% household ammonia (or equivalent) for every 378.5 L of water, circulate through sprayer for 5 minutes, and then flush all hoses, booms, screens and nozzles for a minimum of 15 minutes. If diaphragms are being used on the spray boom, loosen diaphragms before flushing the spray system, allowing cleaning solution to spray through the open diaphragm. If spray lines have any end caps, they must be loosened before flushing the system, allowing cleaning solution to spray though the loosened caps. To enhance removal of Fierce Herbicide from the spray system, add a tank cleaner in place of ammonia and allow the cleaning solution to remain in the pressurized spray system (spray tank, hoses and boom) for 8 hours before flushing the system for a minimum of 15 minutes.
4. Drain tank completely.
5. Add enough clean water to the spray tank to allow all hoses, booms, screens and nozzles to be flushed for 2 minutes.
6. Remove all nozzles and screens and rinse them in clean water. Spray equipment, including all tanks, hoses, booms, screens and nozzles, should be thoroughly cleaned before it is used to apply postemergence pesticides. Equipment with Fierce Herbicide residue remaining in the system may result in crop injury to the subsequently treated crop.
Use of the following spray methods or equipment DO NOT require a buffer zone: hand-held or backpack sprayer and spot treatment. The buffer zones specified in the table below are required between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands), sensitive aquatic habitats (such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs, wetlands) and estuarine/marine habitats.
For tank mixes, consult the labels of the tank-mix partners and observe the largest (most restrictive) buffer zone of the products involved in the tank mixture and apply using the coarsest spray (ASAE) category indicated on the labels for those tank mix partners.
The following rotational crops may be planted after applying Fierce Herbicide at the listed rate range. Planting earlier than the recommended rotational interval may result in crop injury.
DIRECTIONS FOR USE IN SOYBEAN (Pre-Plant and Preemergence)
TIMING TO SOYBEANS
Fierce Herbicide may be applied to soybeans early pre-plant, prior to planting or preemergence (after planting). Preemergence application of Fierce Herbicide must be made within 3 days after planting and prior to soybean emergence. Application after the soybeans have begun to crack, or are emerged, will result in severe crop injury. Application should not be made when soybeans have begun to crack.
Burndown Applications (Spring and Fall)
Fierce Herbicide, applied as part of a burndown program, may be used for residual weed control where soybeans will be planted directly into a stale seedbed, cover crop, or in previous crop residues. For control of emerged weeds, tank mix with glyphosate, present as the isopropyl amine or potassium salt. Reduced weed control may occur when burndown applications are made to fields where heavy crop and/or weed residue exist. For fall burndown: Application should be made in the fall, just before freeze-up and when winter annuals and perennial weeds are still growing to allow for optimum herbicide absorption and activity. Applications made after a killing frost will result in reduced perennial and winter annual weed control. Do not apply to snow covered or frozen soil. Abnormally warm winters may reduce the length of weed control observed in the spring.
Do not apply more than 315 g of Fierce Herbicide per hectare during a single growing season.
Do not use Fierce Herbicide in soybeans in the same field that flufenacet, alachlor, metolachlor or dimethenamid will be used preemergence, or soybean injury may occur.
Do not irrigate when soybeans are cracking.
Moisture is necessary to activate Fierce Herbicide in soil for residual weed control. Dry weather following applications of Fierce Herbicide may reduce effectiveness. However, when adequate moisture is received after dry conditions, Fierce Herbicide will control susceptible germinating weeds. Fierce Herbicide may not control weeds that germinate after application but before an activating rainfall/irrigation or weeds that germinate through cracks resulting from dry soil.
When adequate moisture is not received after a Fierce Herbicide application, weed control may be improved by irrigation with at least 1.5-2.5 cm of water. If there is mechanical incorporation into the soil or if emerged weeds are controlled by cultivation, residual weed control will be reduced.
Crop injury may occur from applications made to poorly drained soils and/or applications made under cool, wet conditions. Severe crop injury will result when soils are flooded following application of Fierce Herbicide. Risk of crop injury can be minimized by using on well drained soils, planting soybeans at least 4 cm deep, using high quality seed and completely covering seeds with soil prior to preemergence applications. Treated soil that is splashed onto newly emerged crops may result in temporary crop injury.
TANK MIX PARTNERS
Fierce Herbicide may be tank mixed with other herbicides for increased burndown activity, additional residual broadleaf and/or additional grass control. Completely read and follow the label of any potential tank mix partner with Fierce Herbicide. When using tank mixtures, use conditions must be in accordance with the most restrictive of the label limitations and precautions on either herbicide label. Refer to tank mix partner’s label for adjuvant recommendations. Recommended tank mix partners include glyphosate, Liberty 200 SN, Gramoxone and Select.
Additional Residual Broadleaf and Grass Control
Fierce Herbicide can be tank mixed with other products for the control of annual broadleaf and grass weeds, such as FirstRate, Sencor, Lorox, Pursuit, Prowl and Classic. Do not apply with Axiom, Dual II Magnum, Boundary, Frontier, or Integrity or injury may occur.
Round Up Ready Program
Fierce Herbicide may be applied as part of a burndown program or preemergence in conventional tillage programs, at 210 to 315 g/ha, to reduce early season weed competition from labeled weeds in Roundup Ready programs. A sequential post emergence application of glyphosate will be required to control weeds not controlled by Fierce Herbicide.
DIRECTIONS FOR USE IN FALLOW LAND
Fierce Herbicide, at 210 to 315 g/ha, can be used in combination with labeled burndown herbicides to control emerged weeds and provide residual weed control. Weeds controlled by residual activity are listed in Table 1 (see above).
DIRECTIONS FOR USE TO MAINTAIN BARE GROUND ON NON-CROP AREAS OF FARMS
Use Fierce Herbicide for non-selective vegetation control to maintain bare ground on non-crop areas of farms that must be kept weed free. Fierce Herbicide offers residual and postemergence control of susceptible broadleaf and grass weeds as well as an additional mode of action to assist in the control of ALS (acetolactate synthase) resistant weeds. Fierce Herbicide can be tank mixed with the other herbicides for increased residual or postemergence control. The length of residual control is dependent on the rate applied as well as on rainfall and temperature conditions. Length of residual control will decrease as temperature and precipitation increase. Fierce Herbicide rates of 420 to 580 g/ha are required to provide residual control of the weeds listed in Table 2
Do not apply to farm alleys or roads where traffic may result in treated dust settling onto crops or other desirable vegetation.
Do not apply to ditch banks.
Do not apply within 100 metres of non-dormant pears.
Do not apply to powdery soils or soils that are susceptible to wind displacement unless irrigation can be applied immediately after application.
Do not make more than one application per season.
Apply 420 to 580 g/ha of Fierce Herbicide as a preemergence application. Preemergence applications of Fierce Herbicide must be completed prior to weed emergence. Moisture is necessary to activate Fierce Herbicide on soil for residual weed control. Dry weather following application of Fierce Herbicide may reduce effectiveness. However, when adequate moisture is received after dry conditions, Fierce Herbicide will control susceptible germinating weeds.
Apply 420 to 580 g/ha of Fierce Herbicide plus an adjuvant (0.25% v/v non-ionic surfactant) as a postemergence application. The addition of an adjuvant enhances Fierce Herbicide activity on emerged weeds. Thorough spray coverage is necessary to maximize the postemergence activity of Fierce Herbicide. Emerged weeds are controlled postemergence with Fierce Herbicide, however, translocation of Fierce Herbicide within a weed is limited, and control is affected by spray coverage and by the addition of an adjuvant. The most effective postemergence weed control with Fierce Herbicide occurs when applied in combination with a surfactant to weeds less than 5 cm in height. A tank mix partner should be used in combination with Fierce Herbicide for the postemergence control of weeds less than 5 cm.
TANK MIX PARTNERS:
Completely read and follow the label of any potential tank mix partner with Fierce Herbicide. When using tank mixtures, use conditions must be in accordance with the most restrictive of the label limitations and precautions on either herbicide label. Recommended tank mix partners include glyphosate, 2,4-D, Ester and Liberty 200 SN .
For resistance management, please note that Fierce Herbicide is both a Group 14 and a Group 15 herbicide. Any weed population may contain or develop plants naturally resistant to Fierce Herbicide and other Group 14 and/or Group 15 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed. To delay herbicide resistance:
Where possible, rotate the use of Fierce Herbicide or other Group 14 and /or Group 15 herbicides within a growing season (sequence) or among growing seasons with different herbicide groups that control the same weeds in a field.
Use tank mixtures with herbicides from a different group when such use is permitted. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.
Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, and considers tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates; precision fertilizer application method and timing to favour the crop and not the weeds), biological (weed-competitive crops or varieties) and other management practices.
Monitor weed populations after herbicide application for signs of resistance development (for example, only one weed species on the herbicide label not controlled). If resistance is suspected, prevent weed seed production in the affected area if possible by an alternative herbicide from a different group. Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving between fields, and planting clean seed.
Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.
For further information and to report suspected resistance, contact Valent Canada at 519-767- 9262.
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