General Information


SOIL TEXTURE: As used on the label, “Coarse soils” are loamy sand or sandy loam soils. “Medium soils” are loam, silt loam, silt, sandy clay, or sandy clay loam. “Fine soils” are silty clay, silty clay loam, clay, or clay loam. Silty clay loam soils are transitional soils and may be classified as medium textured soils in some regions of the U.S.


Do not allow sprays to drift on to adjacent desirable plants.

Apply this product only as specified on the label.

Do not use on other crops grown for food or forage. Observe all cautions and limitations on labeling of all products used in mixtures.

Do not rotate any crop not listed on the label for 18 months following application of TriCor DF.

For all uses: Low-pressure and high-volume hand-wand equipment is prohibited.


Use a standard low pressure (20 to 40 psi.) herbicide boom sprayer equipped with suitable nozzles and screens no finer than 50-mesh in nozzle and in-line strainers. Agitate thoroughly before and during application with bypass agitation.

GROUND APPLICATION: Apply the proper rate of TriCor DF in a minimum of 10 to 40 gallons of spray mixture per acre broadcast.

Banded Application: Use proportionally less TriCor DF per acre in a band versus a broadcast application. For band application use 1/4 to 1 gallon of spray mix per inch of band width regardless of row spacing.

EXAMPLES: (1) To treat a 15-inch band on rows 30 inches apart, use one-half of the broadcast rate of TriCor DF. (2) To treat a 14-inch band on rows 42 inches apart, use one-third of the broadcast rate of TriCor DF.

AERIAL APPLICATION: Where permitted, apply specified rate in a minimum of 2 to 10 gallons of spray mixture per acre.

Do not apply aerially when wind speed is greater than 10 mph.

NOTE: Do not apply aerially when TriCor DF is tank-mixed with Lasso.

For All Applications of TriCor DF: Sprayer must be accurately calibrated before applying TriCor DF. Check sprayer during application to be sure it is working properly and delivering a uniform spray pattern. As the volume of spray mixture decreases per acre, the importance of accurate calibration and uniform application increases. Avoid other application, misapplication, and boom and spray swath overlapping that will increase spray dosage. (Crop injury may occur as a result). Avoid spray skips and gaps which allow weeds to grow in untreated soil. Do not apply when weather conditions favor spray drift and/or when sensitive or cool season crops, such as cole crops, onions, peas, or strawberries are present in adjacent fields or in areas where wheat is growing in coarse textured soils.

Refer in the label for tank mix information.

Limitations, Restrictions, and Exceptions



(Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota and Wisconsin)

TriCor DF may be used for additional residual weed control of certain broadleaf weed species, when applied in combination with other broadleaf and/or grass herbicides as a tank mixture. All products used must be labeled for use on sweetcorn. The most restrictive restrictions and precautions of all the products used must be observed. Use only labeled rates and methods of applications.

Weeds Controlled: Refer to the PREPLANT AND PREEMERGENCE APPLICATION – FIELD CORN section of the label for a list of weeds controlled by TriCor DF when applied before weed emergence. Use recommended adjuvants when emerged weeds are present. Refer to the BURNDOWN WEED CONTROL – FIELD CORN section for a list of weeds controlled and weed height restrictions.

Sequential Applications: Sequential applications of all herbicides containing metribuzin (the active ingredient in TriCor DF) are subject to a limitation of not more than 0.25 pounds a.i. of metribuzin (5-1/3 ounces of TriCor DF) per acre of corn per use season. There are no other specific restrictions on sequential applications due to the application of TriCor DF.


1. Do not apply more than a total of 5-1/3 ounces TriCor DF (0.25 pounds metribuzin) per acre per growing season.

2. Do not apply preplant or preemergence on soils having a pH 7.0 or greater.

3. Corn seed should be planted a minimum of 1-1/2 inches deep.

4. TriCor DF may only be used in hybrid seed production fields, if both inbred parents are known to be tolerant to TriCor DF.

5. Reduced residual weed control may result when used on organic soils. For this reason, residual weed control is not claimed on organic soils.

6. Observe all precautions and limitations on labeling of all products used in tank mixtures.

Feeding restrictions: Grain, forage, and processing waste may be fed to livestock if harvested at least 60 days after the last application of TriCor DF.

Sensitive Sweet corn Hybrids: Make applications only to hybrids that have established tolerance to the application planned.

Application Methods and Timing: TriCor DF can be applied preplant surface or preemergence as a broadcast or band application in water, fluid fertilizer, or impregnated on dry fertilizer. Ground or aerial equipment may be used. See DIRECTIONS FOR USE section of the label for directions.

Application Rates: Refer to the DIRECTIONS FOR USE section of the label for definitions of “Soil Texture Group” and other information that applies to all applications. Use the lowest rate of the rate range on soils with the lowest percent clay and organic matter for the group and progressively higher rate for increased clay and organic matter content. The clay content is at least twice as important as organic matter when adjusting rates. Rates will vary based on local conditions.

For early preplant application more than 9 days before planting and fields with at least 30% crop residue on the soil surface at application, the application rate may be increased 1 oz/A, but not to exceed 5-1/3 oz/A.

For band applications use proportional less per planted acre.

See DIRECTIONS FOR USE section of the label.

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.