General Information

Nic-It Herbicide is a suspension concentrate used at a rate 2-4 fluid ounces per acre for selective postemergence grass weed control in field corn grown for seed or grain, popcorn and sweet corn.

Do not make more than two applications of Nic-It Herbicide per cropping season. The combined dosage of sequential applications cannot exceed 4 ounces per acre of Nic-It Herbicide.


Normal Planned Use

Nic-It Herbicide may be used on field corn, high lysine, waxy, white or other food grade corn hybrids.

Nic-It Herbicide may be broadcast to corn up to 20” tall (free standing) or that is exhibiting up to and including 6 leaf collars (V6), whichever is more restrictive.

While Nic-It Herbicide has a wide application window, research has shown best results are obtained when applications are made early Postemergence when corn and weeds are small. Target applications to corn that is less than 12” tall for best overall performance.

Timing to Weeds

Apply Nic-It Herbicide when grass weeds are young and actively growing, but before they exceed the sizes indicated in Table 1. Treat heavy infestations of weeds before they become too competitive with the crop, especially where soil moisture and/or fertility are limited. Nic-It Herbicide provides weed control via foliar absorption. Nic-It Herbicide only controls those weeds that have emerged. For later-emerging weeds, a second application or a timely cultivation is required. Applications made to weeds larger than the size indicated on the label or to weeds under stress may result in unsatisfactory control. Refer to LATE OR RESCUE APPLICATIONS.


Nic-It Herbicide may be applied to field corn as a rescue treatment for the control of escaped grass weeds, or as a directed Postemergence application on corn that is taller than 20” or which has more than 6 collars (which ever occurs first).

- For corn 20” to 36” tall, apply Nic-It Herbicide with drop nozzles only and avoid spraying into the whorl of cornstalks.

- Do not apply to corn that is taller than 36” or that exhibits 10 or more collars (V10), whichever is most restrictive.

Applications made to weeds larger than those listed on the label may vary from complete control to suppression. Level of control will depend on the weed species, stage of growth, and environmental conditions.

Due to the unplanned nature of rescue applications, choices must be made between the risks that arise from applications made beyond the proper time for Nic-It Herbicide use, and the effects of season long grass weeds competition and/or harvest complications. These choices must balance risks from improperly timed Nic-It Herbicide use that include, but are not limited to:

- Yield loss due to competition: Research indicates competition from foxtail exceeding 4 inches in height may reduce corn yields. Applications to foxtail and other annual grass weeds that exceed the sizes stated on the label increases the risk of yield losses due to prolonged competition with the crop even though control may be acceptable. Density is more important than just size.

- Incomplete control of grass weeds beyond labeled size: Applications to grass weeds that exceed the labeled sizes can result in reduced control. This incomplete control may reduce corn yield.

- Incomplete grass control due to herbicide stress: Grass weeds under stress from previous herbicide applications may not be actively growing and susceptible to Nic-It Herbicide. This stress may reduce grass control in “rescue” situations.

- Ear malformation: Applications of Nic-It Herbicide on corn that has 7 to 10 collars (V7 to V10) increases the potential for ear malformation (pinching). This risk may be greatly reduced, but not eliminated, by using drop nozzles properly adjusted so as to not apply Nic-It Herbicide into the corn whorl.

Limitations, Restrictions, and Exceptions


Optimum control of the weeds listed can be achieved with 2 ounces of Nic-It Herbicide. Weeds that exceed the listed weed sizes by up to 50% may be partially controlled with rates between 2 to 4 fluid ounces of Nic-It Herbicide per acre.

As weeds mature, their sensitivity to Nic-It Herbicide decreases. As grass weeds become mature (more than 3 tillers), they may not reach the size listed below, due to drought or other environmental factors. Grass weeds that are maturing rapidly should be treated before they reach the stages listed below.

When applied as directed, Nic-It Herbicide will control the listed weeds.

Volunteer cereals (barley, oats, rye, triticale, wheat): 10 inches in the states of WA, OR, ID, and MT, where the use of MSO adjuvants are preferred. See SPRAY ADJUVANTS.

Quackgrass; Sandbur (field, longspine); Wirestem muhly; Woolly Cupgrass; Hemp dogbane; Pokeweed; Thistle, Canada: Suppression

Popcorn, Field Corn Grown for Seed and Sweet Corn

Nic-It Herbicide may be broadcast or applied with drop nozzles to popcorn or field corn grown for seed that is less than 20” tall (free-standing) or that exhibits up to and including 5 leaf-collars (V5), whichever is most restrictive. Do not apply to corn that is taller than 20” or that exhibits more than 5 leaf-collars (V5), whichever is more restrictive.

Many seed companies have tested seed corn in-breds or yellow popcorn hybrids for sensitivity to Nic-It Herbicide and have reported excellent safety. Do not apply Nic-It Herbicide to any white popcorn inbred, or white popcorn hybrid unless specifically approved by the seed company. This includes “White Dynamite” popcorn.

Nic-It Herbicide may be applied to certain sweet corn hybrids grown for fresh markets or under contract for processing. Applications of Nic-It Herbicide may be applied broadcast or with drop nozzles (post-directed) on sweet corn up to 12 inches tall or up to and including 5 leaf-collars (V5). For sweet corn 12-18 inches tall, apply only with drop nozzles. Do not apply to sweet corn taller than 18 inches or those which exhibit 6 or more leaf-collars (v6), and make only one application of Nic-It Herbicide per year.

Sweet corn hybrid sensitivity to Nic-It Herbicide is highly variable, and not all hybrids have been tested for crop tolerance.

Not all seed corn inbreds, popcorn or sweet corn hybrids have been tested, nor does Cheminova have access to all seed company data. Consequently, Cheminova is not responsible for any crop injury arising from the use of Nic-It Herbicide on field corn for seed, popcorn or sweet corn. When tank mixing, check the tank mix partner label for tolerances and instructions for use.

See Soil Insecticide Interaction Information regarding the use of Nic-It Herbicide on popcorn, sweet corn or field corn grown for seed that has been previously treated with a soil insecticide.

Restricted Entry Interval

4 hours