Broadstrike RCPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

GENERAL INFORMATION
Broadstrike RC Herbicide is a selective herbicide for the control of certain annual broadleaved weeds in hybrid field corn and soybeans. In hybrid field corn, Broadstrike RC may be applied surface preplant, preplant incorporated, preemergence or early postemergence. In soybeans, Broadstrike RC may be applied surface preplant, preplant incorporated or preemergence.
Absorption of Broadstrike RC occurs through both foliage and root uptake. Susceptible weeds exposed to Broadstrike RC stop growing and either die or remain non-competitive with the crop. Because uptake and translocation of Broadstrike RC involves uptake by both roots and/or foliage, adequate soil moisture is necessary for optimal activity.
FAILURE TO FOLLOW LABEL INSTRUCTIONS MAY RESULT IN ERRATIC WEED CONTROL OR CROP DAMAGE. READ ALL DIRECTIONS CAREFULLY BEFORE APPLYING.

GENERAL USE PRECAUTIONS

Soil Insecticides: Organophosphate granular insecticides must not be used on a corn crop to be treated with Striker or Fieldstar. Serious crop injury may occur.
DO NOT APPLY BROADSTRIKE RC BY AIR.
Do not apply when weather conditions favour drift to non-target sites. Minimize spray drift to wildlife habitats. To minimize spray drift to non-target areas:

1. Do not use nozzles that produce a fine spray droplet.
2. Use sufficient spray volume to ensure adequate coverage with large droplet size sprays.
3. Keep ground-driven spray boom as low as possible above the target surface.
4. Spray when conditions are calm or wind speed is less than 10 km/hr.
Adequate soil moisture is required for optimum herbicide activity of Broadstrike RC. Surface preplant, preemergence or early postemergence applications of Broadstrike RC require an activating rainfall which moistens the soil to a depth of at least 5 cm.
Do not apply when air temperature is near freezing or when freezing conditions are expected for several days following time of application.
Extended cold, wet conditions (soil temperatures below 10 C for extended periods) or abnormally high soil moisture conditions during emergence and early crop development can cause Broadstrike RC injury symptoms on corn such as temporary yellowing of the leaves and/or crop stunting. Corn will quickly outgrow these symptoms once normal growing conditions resume.
Over-application may result in crop injury or rotational crop damage from soil residues.
Conditions such as seedling disease, cold weather, excessive moisture, compacted soils (such as along headlands) or eroded knolls or hillsides may increase the possibility of crop injury from Broadstrike RC.
Make only 1 application per year.
Do not apply Broadstrike RC to sweet corn, seed corn or popcorn.
For use in corn at 62.5 g/ha, do not apply to areas where the soil pH is greater than 7.8 or where the soil organic matter is less than 2.0%.
For use in soybeans at 87.5 g/ha, do not apply to areas where (both apply) the soil pH is greater than 7.8 and organic matter is less than 2% as this may result in decreased crop tolerance.
Do not apply to peat or muck soils or where the soil organic matter is greater than 5%.
Do not repeat application of Broadstrike RC to the same field in the following season as there is a potential for residue build-up.

ROTATIONAL CROP RESTRICTIONS
When tank mixing with other herbicides, follow the most restrictive crop rotation guidelines on the label of each product used. The table below outlines the interval required between the application of Broadstrike RC and the seeding of rotational crops.

Crop: winter wheat
Crop Rotation Interval (months): 4

Crop: spring wheat, spring barley, oats, soybeans, common beans (dry, snap), lima beans, processing peas, field corn, seed corn
Crop Rotation Interval (months): 10

Rotational crops except field corn and soybeans may sustain injury if dry conditions, not favourable to herbicide breakdown, persist following application of Broadstrike RC.

Following application of Broadstrike RC in a dry year, the risk of injury to rotational crops may increase in light-textured soils containing less than 2% organic matter because of a higher bioavailability of herbicide residues for plant uptake.
A field bioassay should be conducted before planting other crops not listed above. A successful field bioassay means growing to maturity a test strip of the crop(s) intended for production the following year.
Field Bioassay
Using typical tillage, seeding practices, and timings for the particular crop, plant several strips of the desired crop across the field previously treated with Broadstrike RC. Plant the strips perpendicular to the direction Broadstrike RC was applied. The strips should also be located so that different field conditions are encountered, including soil texture, drainage and compacted areas. If the crop does not show visible symptoms of injury or stand reduction, the field can be seeded with the test crop in the growing season following the bioassay. If visible injury or stand reduction occurs, the test crop should not be seeded and the bioassay must be repeated the next growing season.

PREHARVEST/GRAZING INTERVAL
The pre-harvest interval for hybrid field corn is 90 days.
Do not graze the treated corn crop prior to harvest for silage; sufficient data are not available to support such use.
Do not graze the treated soybean crop or cut for hay; sufficient data are not available to support such use.

Tank Mixtures
In some cases, tank mixing a pest control product with another pest control product or a fertilizer can result in biological effects that could include, but are not limited to: reduced pest efficacy or increased host crop injury. The user should contact Dow AgroSciences Canada Inc. at 1-800-667-3852 or www.dowagro.ca for information before mixing any pesticide or fertilizer that is not specifically recommended on this label. The user assumes the risk of losses that result from the use of tank mixes that do not appear on this label or that are not specifically recommended by Dow AgroSciences Canada Inc.

DIRECTIONS FOR USE
Broadstrike RC is for use on hybrid field corn and soybeans.

Application Rates for Broadstrike RC:

Crop: Field corn
Rate (g/ha): 62.5 g/ha
Application Method: SPRE, PRE, PPI, early POST
Weeds Controlled: velvetleaf, redroot pigweed, common lamb’s-quarters, wild mustard
Weeds Suppressed (1): common ragweed
Application Method: SPRE, PRE, PPI
Weeds Controlled: Eastern black nightshade
Application Method: SPRE, PRE
Weeds Controlled: Canada fleabane 

Crop: Soybeans
Rate (g/ha): 87.5 g/ha
Application Method: SPRE, PRE, PPI
Weeds Controlled: velvetleaf, redroot pigweed, common lamb’s-quarters, Eastern black nightshade, wild mustard,lady’s thumb, wormseed mustard
Weeds Suppressed (1): common ragweed
Application Method: SPRE, PRE
Weeds Controlled: Canada fleabane
Application Method: PRE, PPI
Weeds Suppressed (1): cocklebur, green foxtail
Application Method: PPI
Weeds Suppressed (1): lady’s-thumb

(1) Weed suppression is a visual reduction in weed competition (reduced population, size and/or vigour) as compared to an untreated area.

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 habitat by cleaning of equipment or disposal of wastes.
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.
DO NOT apply by air.

CORN APPLICATION METHODS

Surface Preplant Application (SPRE)
Broadstrike RC in a tank-mix with Dual II Magnum Herbicide may be applied in minimum or no tillage systems up to 15 days before planting. To the extent possible, do not move treated soil out of the row or move untreated soil to the surface during planting or weed control will be diminished. Annual broadleaved weeds beyond the 2 leaf stage of growth will not be controlled by surface preplant applications.

Preplant Incorporated Application (PPI)
Apply Broadstrike RC in a tank-mix with Dual II Magnum up to 15 days before planting. Incorporate Broadstrike RC in a uniform manner with equipment set to work at a depth of 5 to 8 cm. Use a C or S shank field cultivator equipped with a levelling device such as harrows or rolling basket attachment. The cultivator must have a minimum of 4 rows of sweeps spaced at 18 cm or less intervals and staggered so that no soil is left unturned. Tandem discs may also be used providing the blades are less than 50 cm in diameter and spaced 18 cm or less apart. Equipment design including any drag attachments must be adequate to avoid soil ridging which may result in streaked or reduced weed control. Operate disc implements at 6 to 10 km/hr and cultivators at 10 to 13 km/hr.

Preemergence Application (PRE)
Preemergence applications may be made in conventional tillage as well as reduced tillage, ridge tillage and no-till systems. Apply Broadstrike RC in a tank-mix with Dual II Magnum during (behind the planter) or after planting, but prior to crop or weed emergence. Adequate soil moisture is required for optimum herbicidal activity. Rainfall is necessary to move Broadstrike RC into the weed germination zone. Sufficient rainfall to moisten the soil to a depth of 5 cm is generally adequate. If adequate rainfall is not received within 7 to 10 days after a surface application, a shallow cultivation or use of a rotary hoe is recommended to control established weeds and move the herbicide into the weed germination zone. When adequate rainfall is received following dry conditions, activity on established weeds will depend on the weed species and the location of its root system in the soil.

Early Postemergence Application (Early POST)
Apply Broadstrike RC as a broadcast application when corn is at the spike to 2 leaf stage of growth. Apply when broadleaved weeds are at the cotyledon to 2 leaf stage of growth. Application to larger weeds will result in reduced weed control. Adequate soil moisture is required for optimum herbicidal activity. Rainfall is necessary to move Broadstrike RC into the weed germination zone for control of weeds not emerged at the time of application. Sufficient rainfall to moisten the soil to a depth of 5 cm is generally adequate. If adequate rainfall is not received within 7 to 10 days after a early postemergence application, a shallow cultivation is recommended to control established weeds and move the herbicide into the weed germination zone. When adequate rainfall is received following dry conditions, activity on established weeds will depend on the weed species and the location of its root system in the soil. Do not apply Broadstrike RC in liquid fertilizer solutions for early postemergence applications. Serious crop injury may occur.

SOYBEAN APPLICATION METHODS

Surface Preplant Application (SPRE)
Broadstrike RC in a tank-mix with Dual II Magnum and/or a glyphosate product such as the VantageTM Plus MAX II Herbicide, MaverickTM III, Roundup or Touchdown brands may be applied in minimum or no tillage systems up to 21 days before planting. To the extent possible, do not move treated soil out of the row or move untreated soil to the surface during planting or weed control will be diminished. Annual broadleaved weeds beyond the two leaf stage of growth will not be controlled by surface preplant applications.

Preplant Incorporated Application (PPI)
Apply Broadstrike RC in a tank-mix with Dual II Magnum or Treflan E.C. up to 21 days before planting. Broadstrike RC tank-mixed with Treflan E.C. must be incorporated within 24 hours of application. Incorporate Broadstrike RC in a uniform manner with equipment set to work at a depth of 5 to 8 cm. Use a C or S shank field cultivator equipped with a levelling device such as harrows or rolling basket attachment. The cultivator must have a minimum of 4 rows of sweeps spaced at 18 cm or less intervals and staggered so that no soil is left unturned. Tandem discs may also be used providing the blades are less than 50 cm in diameter and spaced 18 cm or less apart. Equipment design including any drag attachments must be adequate to avoid soil ridging which may result in streaked or reduced weed control. Operate disc implements at 6 to 10 km/hr and cultivators at 10 to 13 km/hr.

Preemergence Application (PRE)
Preemergence applications may be made in conventional tillage as well as reduced tillage, ridge tillage and no-till systems. Apply Broadstrike RC in a tank-mix with Dual II Magnum during (behind the planter) or after planting, but prior to crop or weed emergence. Adequate soil moisture is required for optimum herbicidal activity. Rainfall is necessary to move Broadstrike RC into the weed germination zone. Sufficient rainfall to moisten the soil to a depth of 5 cm is generally adequate. If adequate rainfall is not received within 7 to 10 days after a surface application, a shallow cultivation or use of a rotary hoe is recommended to control established weeds and move the herbicide into the weed germination zone. When adequate rainfall is received following dry conditions, activity on established weeds will depend on the weed species and the location of its root system in the soil.

The Pre-Harvest Interval (PHI) for soybean is 90 days.

BUFFER ZONES
Use of the following spray methods or equipment DOES 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, wood lots, hedgerows, riparian areas and shrublands), sensitive freshwater habitats (such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands).

Method of Application: Field sprayer
Crop: Hybrid field corn
Buffer Zones (Metres) Required for the Protection of: Freshwater Habitat of Depths: Less than 1 m: 1
Buffer Zones (Metres) Required for the Protection of: Freshwater Habitat of Depths: Greater than 1 m: 1
Buffer Zones (Metres) Required for the Protection of: Terrestrial habitat: 15

Crop: Soybean
Buffer Zones (Metres) Required for the Protection of: Freshwater Habitat of Depths: Less than 1 m: 1
Buffer Zones (Metres) Required for the Protection of: Freshwater Habitat of Depths: Greater than 1 m: 1
Buffer Zones (Metres) Required for the Protection of: Terrestrial habitat: 20

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 label for those tank-mix partners.

RESISTANCE MANAGEMENT RECOMMENDATIONS
For resistance management, please not that Broadstrike RC Herbicide is a Group 2 herbicide. Any weed population may contain or develop plants naturally resistant to Broadstrike RC and other Group 2 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 Broadstrike RC Herbicide or other Group 2 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 or to report suspected resistance, contact Dow AgroSciences Canada Inc. at 1-800-667-3852 or at www.dowagro.ca

NOTICE TO USER: This pest control product is to be used only in accordance with the directions on the label. It is an offence under the Pest Control Products Act to use this product in a way that is inconsistent with the directions on the label. The user assumes the risk to persons or property that arises from any such use of this product.