DILIGENT herbicide is a dispersible granule formulation to be mixed with water and sprayed for selective burndown and residual weed control in soybeans with Bolt™ technology. When applied according to the instructions on this label, it will control many broadleaf weeds and provide partial control of nutsedge and annual grasses. Crop injury may occur from applications made to poorly drained soils under cool, wet conditions. Risk of crop injury can be minimized by not using on poorly drained soils, planting at least 1.5 inches deep and completely covering seeds with soil prior to preemergence applications. Residual applications of DILIGENT require rainfall or sprinkler irrigation to activate the herbicide. Degree of control and duration of effect depend on: rate used, weed spectrum, growing conditions at and following time of treatment, soil pH, texture, organic matter, moisture and precipitation. Best residual control is obtained if DuPont DILIGENT is applied to moist soil and followed by rainfall or irrigation (~1”) before weeds germinate. Several small rainfalls of less than 1/4” each are not as beneficial as one large rainfall of 1/2-1”. On dry soil, more moisture is required for activation (1-2”) before weed emergence. If moisture is insufficient to activate the herbicide, a rotary hoeing or shallow cultivation should be made after emergence of the crop while weeds are small enough to be controlled by mechanical means. Deep cultivation reduces the effectiveness of DILIGENT™ and should be avoided.
DILIGENT, which contains the active ingredients rimsulfuron, chlorimuron-ethyl, and flumioxazin, is both a Group 2 and a Group 14 herbicide based on the mode of action classification system of the Weed Science Society of America. When herbicides with mode of action classifications that affect the same biological sites of action are used repeatedly over several years to control the same weed species in the same treatment area, naturally-occurring resistant biotypes may survive a correctly applied herbicide treatment, propagate, and become dominant in that area. Adequate control of these resistant weed biotypes cannot be expected. If weed control is unsatisfactory, it may be necessary to retreat the problem area using a product affecting a different biological site of action.
To better manage herbicide resistance through delaying the proliferation and possible dominance of herbicide resistant weed biotypes, it may be necessary to change cultural practices within and between crop seasons such as using a combination of tillage, retreatment, tank-mix partners and/or sequential herbicide applications that affect a different site of action. Weed escapes that are allowed to go to seed, and movement of plant material between treatment areas on equipment will promote the spread of resistant biotypes.
It is advisable to keep accurate records of pesticides applied to individual fields to help obtain information on the spread and dispersal of resistant biotypes. Consult your agricultural dealer, consultant, applicator, and/or appropriate state agricultural extension service representative to determine appropriate actions for treating specific resistant weed biotypes in your area.
Prior to choosing appropriate rate and application timings for DILIGENT give careful consideration to geographic use regions, additional herbicides that may be applied to the field, and potential rotational crops noted in the REGIONAL RATE DIRECTIONS and ROTATIONAL CROP GUIDELINE section of this label. Do not apply more than the following in a crop year:
• A total of 8 ounces per acre of DuPont DILIGENT
• 1 ounce active ingredient per acre rimsulfuron
• 0.82 ounce active ingredient per acre chlorimuron ethyl in the Central Region states or 1.07 ounces active ingredient per acre chlorimuron ethyl in the Southern Region states
• 2 ounces active ingredient per acre flumioxazin
• This includes combinations of preemergence and burndown applications of DILIGENT, as well as rimsulfuron, chlorimuron ethyl, or flumioxazin from application(s) of products such as “Valor”, DuPont AFFORIA, DuPont CANOPY brands, DuPont ENVIVE, DuPont ENLITE, DuPont LEADOFF, DuPont SYNCHRONY XP or DuPont TRIVENCE. (Consult ROTATIONAL CROP GUIDELINES section for more information).
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