CORN (FIELD AND SILAGE) - MEDIUM - 3% OR GREATER ORGANIC MATTER
SureStart herbicide is designed for use on herbicide tolerant (such as Roundup Ready or Liberty Link) and conventional field corn and silage corn. It may be used in preplant, preemergence, or early postemergence applications in corn. It is designed to provide early season control of grass and broadleaf weeds to allow for optimal timing of the in-crop poste m ergence application of glyphosate or glufosinate.
SureStart is a unique combination of the herbicides acetochlor, flumetsulam, clopyralid, and the safener dichlormid. SureStart may be applied to the surface or incorporated into the top 1 to 2 inch layer of soil. It is specified for use alone or in tank mix combinations for control or suppression of weeds, as indicated in the Target Weeds section of these use directions. SureStart controls weeds by interfering with normal germination and seedling development. SureStart may provide postemergence activity on 1 to 2 inch broadleaf weeds present at application but will not provide postemergence activity on grass weeds present at application. If emerged grass and broadleaf weeds are present at the time of application, best results will be achieved by tank mixing a herbicide such as glyphosate (Durango DMA or Roundup), glufosinate (Liberty) or paraquat (Gramoxone) and/or 2,4-D with SureStart.
Use Precautions and Restrictions
- On the following soil types, do not apply this product within 50 feet of any well where the depth to groundwater is 30 feet or less: sands with less than 3% organic matter; loamy sands with less than 2% organic matter; or sandy loams with less than 1 percent organic matter. See the figure for additional clarification.
- Do not use flood irrigation to apply or incorporate this product.
- Do not apply this product using aerial application equipment.
- This product may not be mixed or loaded within 50 feet of any wells including abandoned wells and drainage wells, sink holes, 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 pad 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 selfcontained.
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 specified 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.
- Read and follow these Advisories to minimize drift to non-target areas.
- Minimize drift by using sufficient spray volume to ensure adequate coverage with large-droplet size sprays.
- Use low pressure application equipment capable of producing a large-droplet spray. Do not use nozzles that produce a fine-droplet spray. Droplet size has been shown to be the single most important factor affecting drift from ground applications.
- While increasing droplet size does reduce the potential for spray drift, larger droplets do not eliminate drift if environmental or application conditions are inappropriate for application.
- Use larger capacity nozzles to increase flow rate rather than increasing spray pressure.
- Keep height of ground-driven spray booms as low as possible above the target to minimize exposure to evaporation and wind while still providing good coverage. Applications made late in the growing season with excessive boom heights drastically increase the potential for spray drift.
- Make application when the wind velocity favors on-target product deposition (approximately 3 to 10 mph).
- Do not apply when wind is gusting or wind speed exceeds 15 mph as uneven spray coverage and drift may result. Avoid application to border rows adjacent to susceptible crops such as soybeans, field peas, or sunflowers under windy conditions unless one of the following drift management steps is taken:
- application is made only when the wind direction is such that the susceptible crop is up-wind from the treatment area (wind blowing from the susceptible crop toward the treated crop); or
- the applicator leaves an adequate buffer zone between the treated crop and the susceptible crop and coarse or low drift nozzle configurations are used.
- A drift control or deposition agent may be used with this product to aid in reducing spray drift due to wind when making applications adjacent to susceptible crops, but may not be effective after prolonged pumping of the spray mix.
- On calm days with little or no wind, check for temperature inversions before making herbicide applications. Temperature inversions occur under calm conditions with little or no wind and air temperature increases with increasing height above the ground.
Inversion conditions may be indicated by a layer of fog or mist near the ground and, under clear conditions, may be detected by use of a smoke column. A temperature inversion is indicated when smoke does not rise in a column, but layers at some level above the ground. Do not apply herbicides if temperature inversion conditions exist in the treatment area.
- Do not apply under conditions that favor runoff or wind erosion of soil containing this product to non-target areas. To prevent off-site movement due to runoff or wind erosion:
- Avoid treating powdery dry or light sandy soils when conditions are favorable for wind erosion. Under these conditions, the soil surface must first be settled by rainfall or irrigation.
- Do not apply to impervious substrates such as paved or highly compacted surfaces or frozen or snow covered soils.
- Do not use tailwater from the first flood or furrow irrigation of treated fields to treat non-target crops unless at least 1/2 inch of rainfall has occurred between application and the first irrigation.
- Uneven application or uneven incorporation of SureStart can result in erratic weed control or crop injury. Over application may result in crop injury or rotational crop damage from soil residue.
- Maximum Application Rates: The total cumulative maximum application amount of SureStart on corn is 3.5 pints per acre per crop season.
- Do not exceed 2 pints per acre in a single application.
Restrictions and Precautions For Soil Application (Not Applicable To Postemergence Use)
- Corn Planting Depth: Minimum planting depth should be at least 1 1/2 inches.
- Do not apply to areas where the soil pH is greater than 7.8 as this may result in increased crop injury.
- Do not apply to a soil containing greater than 5% organic matter if the soil pH is below 5.9 as reduced weed control will result.
- Use of SureStart in soil-applied treatments on soils with less than 1.5% organic matter (O.M.) may result in crop injury. Apply as a soil-treatment to fields which have less than 1.5% O.M. only if the risk of crop injury is acceptable.
- If any herbicide with ALS (acetolactate synthase) inhibition mode of action such as Pursuit, Canopy, Classic, Scepter, or Squadron herbicide, etc., was applied the previous year, apply SureStart to corn only if the rotational restrictions applicable to corn for the preceding product has been met.
Adverse Weather Conditions
- Extended cold, wet conditions (soil temperatures below 50ºF and excessive rainfall with wet soil conditions), following application of SureStart to herbicide tolerant corn, which persist during germination and/or early crop development may result in crop injury. Injury symptoms, which include yellowing of leaves and/or crop stunting, are usually temporary and affected corn plants usually recover without affecting yield.
- Dry weather following preplant surface or preemergence applications of SureStart may reduce effectiveness. If sufficient activating rainfall or overhead irrigation does not occur within 7 to 10 days of application, rotary hoe, harrow, or shallowly cultivate to incorporate the herbicide lightly into the soil. Use a preplant incorporated application when a period of dry weather is predicted after application.
- Low humidity and high temperatures increase the likelihood of spray drift to sensitive areas. Avoid spraying during conditions of low humidity and/or high temperatures. Do not apply during inversion conditions.
Soil Insecticide Advisories
When SureStart is used for soil applied weed control in corn:
- Soil applied organophosphate insecticides (except terbufos or phorate, see below) should be applied in a T-band or a band to avoid potential crop injury.
- Terbufos (Counter insecticide products) or phorate (Thimet insecticide products ) should not be used.
- Soil insecticides from other classes of chemistry may be applied in furrow, T-banded, or banded.
Soil Insecticide Advisories for Postemergence Applications
- Do not apply SureStart postemergence if corn was previously treated with terbufos (Counter insecticide products) or phorate (Thimet insecticide products) as severe crop injury may result.
- Postemergence applications of SureStart to corn previously treated with T-band, band, or in-furrow applications of other organophosphate insecticides such as Lorsban, Aztec or Fortress, insecticides may c a use temporary crop injury.
Foliar Insecticide Advisories for Postemergence Applications
- Do not tank mix SureStart with foliar postemergence organophosphate insecticides as severe crop injury may result. To avoid crop injury, apply the foliar organophosphate insecticide treatment at least 10 days before or 10 days after the application of SureStart.
- SureStart may be tank mixed with non-organophosphate foliar insecticides, provided they are labeled for use with postemergence corn herbicides.
Other Precautions and Restrictions
- Do not apply SureStart to sweet corn or popcorn.
- Hybrid Seed Production: Corn inbred lines grown for hybrid seed production may be injured by SureStart. Inbred lines should be thoroughly tested for crop tolerance before treating large acreage.
While growers are not prohibited from using SureStart on seed corn, Dow AgroSciences will not accept responsibility for any crop injury arising from the use of SureStart on field corn grown for seed.
- Preharvest interval: An interval of at least 85 days is required between application of SureStart and field corn harvested for grain.
- Avoid all direct or indirect contact with non-target plants. Do not apply near desirable vegetation. Allow adequate distance between target area and desirable plants under conditions of application to minimize potential exposure.
- Crop Residues from Treated Areas: Crop residues from treated areas cannot be used for composting or mulching on ground where susceptible crops may be grown the following season. To promote herbicide decomposition, plant material should be evenly incorporated or burned. Adequate moisture is also required to promote breakdown of plant residues, which contain clopyralid.
- Do not move treated soil. Avoid situations where soil particles may blow into areas where susceptible crops are grown. The hazard of movement of this product on dust is reduced if treated fields are irrigated or if rain occurs shortly after application.
- Do not apply under conditions that favor runoff or wind erosion of soil containing SureStart to non-target areas. To prevent off-site movement due to runoff or wind erosion:
- Avoid treating powdery dry or light sandy soils when conditions are favorable for wind erosion. Under these conditions, the soil surface should first be settled by rainfall or irrigation.
- Do not apply to impervious substrates such as paved or highly compacted surfaces or frozen or snow covered ground.
- Do not apply to soils when saturated with water.
- Do not apply when weather conditions favor drift to non-target sites. Spray drift of SureStart to emerged soybeans or soil to which soybeans will be planted during the same growing season may cause soybean injury.
Field Bioassay Instructions: In fields previously treated with this product, plant short test rows of the intended rotational crop across the original direction of application in a manner to sample field conditions such as soil texture, soil pH, drainage, and any other variable that could affect the seed bed of the new crop. Field bioassay at any time between harvest of the treated crop and the planting of the rotational crop. Observe the test crop for herbicidal activity, such as poor stand (effect on seed germination) chlorosis (yellowing), and necrosis (dead leaves or shoots), or stunting (reduced growth). If herbicidal symptoms do not occur, the test crop can be grown. If there is apparent herbicidal activity, do not plant the field to the test rotational crop; plant only a labeled crop or crop listed in the table above for which the rotational interval has clearly been met.
Weed Resistance Management Guidelines
This product contains acetochlor, a Group 15 herbicide, flumetsulam, a Group 2 herbicide, and clopyralid, a Group 4 herbicide. Any weed population can contain plants naturally resistant to Group 15, 4 or 2 herbicides but may be effectively managed utilizing another herbicide from a different Group and/or by using cultural or mechanical practices.
However, any herbicide mode of action classification by itself may not adequately address specific weeds that are resistant to specific herbicides. Consult your Dow AgroSciences representative, state cooperative extension service, professional consultants, or other qualified authorities to determine appropriate actions for treating specific resistant weeds.
Best Management Practices
Proactively implementing diversified weed control strategies to minimize selection for weed populations resistant to one or more herbicides is recommended. A diversified weed management program may include the use of multiple herbicides with different modes of action and overlapping weed spectrum with or without tillage operations and/or other cultural practices. Research has demonstrated that using full labeled rates and following directions for use is important to delay the selection for resistance. Scouting after a herbicide application is important because it can facilitate the early identification of weed shifts and/or weed resistance and thus provide direction on future weed management practices.
One of the best ways to contain resistant populations is to implement measures to avoid allowing weeds to reproduce by seed or to proliferate vegetatively. Cleaning equipment between sites and avoiding movement of plant material between sites will greatly aid in retarding the spread of resistant weed seed.
General principles of herbicide resistance management
1. Apply integrated weed management practices. Use multiple herbicide modes-of-action with overlapping weed spectrums in rotation, sequences, or mixtures.
2. Use the full recommended herbicide rate and proper application timing for the hardest to control weed species present in the field.
3. Scout fields after herbicide application to ensure control has been achieved. Avoid allowing weeds to reproduce by seed or to proliferate vegetatively.
4. Monitor site and clean equipment between sites.
For annual cropping situations also consider the following:
- Start with a clean field and control weeds early by using a burndown treatment or tillage in combination with a preemergence residual herbicide as appropriate.
- Use cultural practices such as cultivation and crop rotation, where appropriate.
- Use good agronomic principles that enhance crop competitiveness
- Use new commercial seed that is as free of weed seed as possible.
Report any incidence of repeated non-performance of this product on a particular weed to your Dow AgroSciences representative, local retailer, or county extension agent.
Application Timing and Methods
For the optimum period of effective weed control during the time most critical to corn production, preplant and preemergence applications of SureStart herbicide should occur as close as possible to planting and prior to weed emergence. Postemergence applications may be made from prior to weed emergence up to 1 to 2 inch weeds. If weeds are emerged, apply in tank mix combination with a glyphosate product such as, Durango DMA or Roundup or a glufosinate product such as, Liberty to control emerged weeds in herbicide tolerant corn.
Early Preplant: SureStart and certain tank mixtures may be applied as early as 30 days before planting.
Preplant Incorporation: SureStart and certain tank mixes may be mechanically incorporated into the top 2 inches of the soil by mechanical means such as field cultivators, discs, or spring tooth harrows any time up to 14 days before planting. Improper incorporation, excessive crop residues, or poor soil tilth may result in erratic, streaked, or otherwise unsatisfactory weed control. Do not mix SureStart deeper than 2 inches in to the soil and avoid moving or shaping soil after incorporation.
Preemergence Surface: SureStart and certain tank mixes may be applied to the soil surface as a broadcast or banded application. Precipitation or sprinkler irrigation of at least 0.25 inch is required to bring SureStart into contact with germinating seeds. If rain or sprinkler irrigation does not occur within 7 days after application, weed control may be improved by using a rotary hoe or similar equipment to incorporate the herbicide.
Incorporation equipment should be run at a shallow depth to avoid disturbance of germinating corn seed. Erratic weed control resulting from exposure of untreated soil may occur if surface soil is moved or reshaped after incorporation.
Postplant-Preemergence: SureStart may be applied after planting but prior to corn emergence. If rain or sprinkler irrigation does not occur within 7 days after application, weed control may be improved by using a rotary hoe or similar equipment to shallowly incorporate the herbicide.
Incorporation equipment should be run at a shallow depth to prevent disturbance of the germinating corn. Erratic weed control resulting from exposure of untreated soil may occur if surface soil is moved or reshaped during incorporation.
Early Postemergence: SureStart may be applied early postemergence to corn up to 11 inch tall corn. Applications may be made from prior to weed emergence up to 1 to 2 inch weeds. If weeds are emerged, apply in tank mix combination with a glyphosate product such as Durango DMA or Roundup or a glufosinate product such as Liberty to control emerged weeds in herbicide tolerant corn. Read and follow restrictions and directions on tank mix product labels. SureStart will provide limited activity on small (1-2 inch) emerged broadleaf weeds but will not control established or germinated grass weeds present at application listed in the Target Weeds Controlled or Partially Controlled section of the label. If grass and broadleaf weeds have germinated, and emerged, best results will be achieved by tank mixing a glyphosate herbicide (Durango DMA or Roundup) or glufosinate herbicide (Liberty) with SureStart for control of emerged weeds. SureStart will provide soil residual control of the grass and broadleaf weeds listed in the Target Weeds Controlled or Partially Controlled section of the label. Note: Postemergence applications of SureStart tank mixed with glyphosate may be applied only on corn varieties designated as containing the glyphosate tolerant gene.
Postemergence applications of SureStart tank mixed with glufosinate may be applied only on corn varieties designated as containing the Liberty Link gene.
Sprinkler Irrigation: Do not apply SureStart by sprinkler irrigation.
Use a sprinkler system only to incorporate SureStart after application.
After SureStart has been applied, a sprinkler irrigation system set to deliver 0.25 to 0.75 inch of water per acre may be used to incorporate the product. Using more than 0.75 inch of water could result in reduced performance. On sandy soil low in organic matter, use no more than 0.5 inch of water. Do not use flood irrigation to apply or incorporate SureStart.
Fall Application: Following soybean harvest, apply to soybean stubble after October 15, when the sustained soil temperature at 4-inch depth is less than 50oF, but before ground freezes. Use on medium and fine textured soils with greater than 2.5% organic matter. Only corn may be planted the following spring.
Ground may be tilled before or after application. Do not exceed 2-inch incorporation depth if tilled after application.
If a spring application is made, the total rate of the fall plus spring application must not exceed the maximum labeled rate for corn grown on that soil.
Cultivation should be delayed as long as possible. If weeds develop, a shallow cultivation or rotary hoeing will generally result in improved weed control. If SureStart was incorporated, cultivate to a depth of less than half the depth of incorporation.
If cultivation is necessary due to soil crusting or compaction, adjust equipment to run shallow and minimize soil movement. This will decrease the possibility of diluting or moving the herbicide from the weed control zone.
Soil Texture and Organic Matter
The use rate of SureStart is determined by a combination of two factors, soil texture and organic matter, which must be determined prior to application. Different soil textures are grouped into three textural classes (coarse, medium, and fine) as outlined in Table 1. Soil texture and organic matter content of the soil may be determined from soil survey information and/or by laboratory analysis and must be known in order to select the proper rate from Table 2.
Refer in the label for tank mix information.
Refer to the Supplemental Label for the Rotation Interval for Sweet Corn Varieties Grown for Processing in the States of Minnesota, Wisconsin, Illinois and Iowa.
CORN (FIELD AND SILAGE)
SureStart may be used in conventional, reduced and no-till systems. Optimal weed control will be obtained when applications are made as close as possible to planting but before weeds emerge. However, applications may be made from 30 days prior to planting through 11 inch tall corn. In reduced or no-till systems, it is recommended that a burndown herbicide such as glyphosate (Durango DMA, Roundup or Touchdown), glufosinate (Liberty) or paraquat (Gramoxone) and, or 2,4-D be tank mixed with SureStart if emerged weeds are present at application.
Thistle, Canada: Burndown activity of Canada thistle in minimum and no-till corn only.