General Information


TripleFLEX Herbicide is designed for use on herbicide tolerant field corn and silage corn, such as Roundup Ready or Liberty Link field 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 postemergence application of glyphosate or glufosinate.

TripleFLEX Herbicide is a unique combination of the herbicides acetochlor, flumetsulam, clopyralid, and the safener dichlormid. TripleFLEX Herbicide may be applied to the surface or incorporated into the top 1 to 2 inch layer of soil. It is recommended 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. TripleFLEX Herbicide controls weeds by interfering with normal germination and seedling development. TripleFLEX Herbicide 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 TripleFLEX Herbicide.

Use Precautions and Restrictions

- On the following soil types, do not apply this product within 150 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 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 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.

Application Precautions

- Uneven application or uneven incorporation of TripleFLEX Herbicide 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: The total cumulative maximum application amount of TripleFLEX Herbicide 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 ½ 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 TripleFLEX Herbicide 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 TripleFLEX Herbicide 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 50°F and excessive rainfall with wet soil conditions), following application of TripleFLEX Herbicide 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 TripleFLEX Herbicide 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 TripleFLEX Herbicide is used for soil applied broadleaf weed control in corn:

- Soil applied organophosphate insecticides should be applied in a T-band or a band to avoid potential crop injury.

- Soil insecticides from other classes of chemistry may be applied in-furrow, T-banded, or banded.

- Terbufos (Counter insecticide products) or phorate (Thimet insecticide products) should not be used.

Soil Insecticide Advisories for Postemergence Applications

- Do not apply TripleFLEX Herbicide postemergence if corn was previously treated with Counter insecticide or Thimet insecticide as severe crop injury may result.

- Postemergence applications of TripleFLEX Herbicide to corn previously treated with T-band, band, or in-furrow applications of other organophosphate insecticides such as Lorsban insecticide, Aztec or Fortress, insecticides may cause temporary crop injury.

Foliar Insecticide Advisories for Postemergence Applications

- Do not tank mix TripleFLEX Herbicide 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 TripleFLEX Herbicide.

- TripleFLEX Herbicide 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 TripleFLEX Herbicide to sweet corn or popcorn.

- Hybrid Seed Production: Corn inbred lines grown for hybrid seed production may be injured by TripleFLEX Herbicide. Inbred lines should be thoroughly tested for crop tolerance before treating large acreage. While growers are not prohibited from using TripleFLEX Herbicide on seed corn, Monsanto Company will not accept responsibility for any crop injury arising from the use of TripleFLEX Herbicide on field corn grown for seed.

- Preharvest interval: An interval of at least 85 days is required between application of TripleFLEX Herbicide 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 TripleFLEX Herbicide 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 TripleFLEX Herbicide 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.

Refer to supplemental label for use on Herbicide Tolerant and Conventional Field and Silage Corn.

Refer in the label regarding tank mix information.

Limitations, Restrictions, and Exceptions

Spring Early Preplant Applications: On medium and fine textured soils, TripleFLEX may be applied 21 or more days prior to planting. If the application is made less than 21 days prior to planting, please refer to product label for specific use rate recommendations.

Restricted Entry Interval

12 hours

Exception: If the product is soil-injected or soil-incorporated, the Worker Protection Standard, under certain circumstances, allows workers to enter the treated area if there will be no contact with anything that has been treated.