For weed control in asparagus, conservation reserve programs, corn, cotton, fallow croplands, general farmstead (noncropland), sorghum, grass grown for seed, hay, proso millet, pasture, rangeland, small grains, sod farms and farmstead turf, soybean, and sugarcane.
This product is a water-soluble formulation intended for control and suppression of many annual, biennials, and perennial broadleaf weeds, as well as woody brush and vines listed in the WEEDS CONTROLLED section of this label. This product may be used for control of these weeds in asparagus, corn, cotton, conservation reserve programs, fallow cropland, grass grown for seed, hay, proso millet, pasture, rangeland, general farmstead (noncropland), small grains, sod farms and farmstead turf, sorghum, soybean, and sugarcane.
DuPont D1691 is a postemergence, systemic herbicide which can have moderate residual control on small seeded broadleaf weeds, including waterhemp, lambsquarters and Palmer pigweed, depending on rainfall and soil type. Refer to the CROP-SPECIFIC INFORMATION section for application timing and other crop-specific details. D1691 is readily absorbed by plants through shoot and root uptake, translocates throughout the plant’s system, and accumulates in areas of active growth. D1691 interferes with the plant’s growth hormones (auxins) resulting in death of many broadleaf weeds. [Optional label text: Do not add [Optional label text: surfactants, additives containing surfactants,] buffering agents or pH adjusting agents to the spray solution when D1691 is the only pesticide being applied unless otherwise directed. See the MIXING section of this label for instructions regarding other additives.]
Maximum Application Rates: The maximum application or use rates stated throughout this label are given in units of volume (fluid ounces or quarts) of this product per acre. However, the maximum allowed application rates apply to this product combined with the use of any and all other herbicides containing the active ingredients dicamba, whether applied separately or as a tank mixture, on a basis of total pounds of dicamba (acid equivalents) per acre. If more than one dicambacontaining product is applied to the same site within the same year, you must ensure that the total use of dicamba (pounds acid equivalents) does not exceed the maximum allowed. See the INGREDIENTS section of this label for necessary product information.
Maximum annual application: Do not exceed 64 fluid ounces of D1691 herbicide (2 pounds acid equivalent) per acre. Refer to Table 2. Crop-Specific Restrictions for crop-specific maximum annual use rates. Preharvest Interval (PHI): Refer to the CROP-SPECIFIC INFORMATION section for preharvest intervals. Restricted Entry Interval (REI): 24 hours Rainfast period: Rainfall or irrigation occurring within 4 hours after postemergence applications may reduce the effectiveness of this product Stress: Do not apply to crops under stress due to lack of moisture, hail damage, flooding, herbicide injury, mechanical injury, insects, or widely fluctuating temperatures as injury may result. Do not apply through any type of irrigation equipment. Do not treat irrigation ditches or water used for crop irrigation or domestic purposes.
WEED RESISTANCE MANAGEMENT
Dicamba mimics auxin (a plant hormone) resulting in a hormone imbalance in susceptible plants that interferes with normal cell division, cell enlargement, and protein synthesis. Dicamba active ingredient is a Group 4 herbicide based on the mode of action classification system of the Weed Science Society of America. Any weed population can contain plants naturally resistant to Group 4 herbicides. Weed species resistant to Group 4 herbicides can be effectively managed utilizing another herbicide from a different Group, or by using other cultural or mechanical practices..
Weed Management Practices
To minimize the occurrence of dicamba-resistant biotypes, observe the following weed management practices:
• Scout your fields before and after herbicide application.
• Start with a clean field, using either a burndown herbicide application or tillage.
• Control weeds early when they are relatively small (less than 4 inches).
• Incorporate other herbicides (e.g., a selective and/or a residual herbicide) and cultural practices (e.g., tillage or crop rotation) as part of your weed control system, where appropriate.
• Use the full specified herbicide rate and proper application timing for the hardest to control weed species present in the field. Avoid tank mixtures with other herbicides that reduce the efficacy of this product (through antagonism), or with ones that encourage application rates of this product below those specified on this label.
• Control weed escapes before they reproduce by seed or proliferate vegetatively.
• Clean equipment before moving from field to field to minimize the spread of weed seed or plant parts.
• Use new commercial seed that is as free of weed seed as possible.
• Use good agronomic principles that enhance crop development and crop competitiveness.
• Report any incidence of repeated non-performance of this product on a particular weed to your DuPont representative, local retailer, or county extension agent.
Management of Dicamba-Resistant Biotypes
Appropriate testing is critical in order to determine if a weed is resistant to dicamba. Contact your DuPont representative to determine if resistance in any particular weed biotype has been confirmed in your area, or visit on the Internet www.weedscience.org.
Since the occurrence of new dicamba-resistant weeds cannot be determined until after product use and scientific confirmation, DuPont is not responsible for any losses that result from the failure of this product to control dicambaresistant weed biotypes.
The following good agronomic practices can reduce the spread of confirmed dicamba-resistant biotypes:
• If a naturally occurring resistant biotype is present in your field, this product may be tank-mixed or applied sequentially with an appropriately labeled herbicide with a different mode of action to achieve control.
• Cultural and mechanical control practices (e.g., crop rotation or tillage) can also be used as appropriate.
• Scout treated fields after herbicide application and control weed escapes, including resistant biotypes, before they set seed.
• Thoroughly clean equipment before leaving fields known to contain resistant biotypes.
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