General Information


Atrazine 4L herbicide controls* many annual broadleaf and grass weeds in the crops included on the label. Atrazine 4L may be applied before or after weeds emerge.

*Important Note: Following many years of continuous use of this product and chemically related products, biotypes of some of the weeds listed on the label have been reported which cannot be effectively controlled by this and related herbicides. These weeds may include Lambsquarters, Pigweed, Black nightshade, Kochia, and others. Where this is known or suspected, we recommend the use of this product in combination with other registered herbicides which are not triazines. Consult your State Agricultural Extension Service about specific weed resistance to atrazine in your area and weed control recommendations. Within the specific crop directions on the label, certain weeds are indicated for suppression only. Weed suppression is a visual reduction in weed competition (reduced population and/or vigor) as compared to an untreated area. Degree of suppression will vary with rate used, size of weeds, and environmental conditions following treatment.

In each case where a range of rates is given, the lower rate should be used on light soils low in organic matter, and the higher rate should be used on heavy soils high in organic matter.

Since Atrazine 4L acts mainly through root absorption, its effectiveness depends on rainfall or irrigation to move it into the root zone. Should weeds develop, a shallow cultivation or rotary hoeing will generally result in better weed control. Care should be taken to avoid using Atrazine 4L where adjacent desirable trees, shrubs, or plants might be injured.

Note: Loveland Products, Inc. does not recommend the use of Atrazine 4L in combination with other herbicides or oils except as specifically described on the label or other literature distributed by Loveland Products, Inc.


Ground Application

For the most uniform distribution of broadcast applications use 80° flat fan type nozzles. For band applications, use flat fan even spray nozzles. Screens and strainers should be no finer than 50 mesh. Use a pump with capacity to (1) provide sufficient hydraulic agitation during mixing and application to keep the material in suspension and (2) maintain 35-40 psi operating pressure. Use a minimum of 5.0 gallons of water per acre for preplant incorporated, pre-emergence and post (without oil or surfactant) applications. Use a minimum of 10.0 gallons of water per acre for all postemergence applications combined with oil or surfactant.

Refer to the label for band applications to calculate the amount to be applied per acre.

Aerial Application

For preplant and pre-emergence broadcast treatments, apply at a 1:1 ratio of Atrazine 4L to water (example: recommendation calls for 1.0 quart of product and is mixed with 1.0 quart of water) to be applied per acre. For postemergence treatments, on corn and sorghum, apply the specified rate of Atrazine 4L or Atrazine 4L plus oil in a minimum of 2.0 gallons of water per acre. Avoid applications under conditions where uniform coverage cannot be obtained or where excessive drift may occur.

Avoid application directly to animals. Flagmen or loaders should avoid inhalation of spray mist.

With fixed-wing aircraft or helicopter application, an exactly even swath deposition cannot be achieved, and consequently crop injury or pesticide nonperformance may result wholly or in part. Do not apply by air during periods of thermal inversion.

Refer to the label for tank mix information.

Limitations, Restrictions, and Exceptions


Atrazine 4L may be applied either before planting, at planting or after planting.

Use only on medium and fine textured soils having a minimum of 1% organic matter, except as separately recommended for furrow - irrigated bedded Sorghum grown in Arizona and California. Post-emergence applications to Sorghum must be made before Sorghum exceeds 12 inches in height.

Preplant (Broadleaf and Grass Control):

Broadcast in the spring after plowing. Application may be made before, during or after final seedbed preparation.

If soil is tilled or worked after application, avoid deep incorporation of Atrazine 4L. Best results have been obtained when Atrazine 4L is applied within 2 weeks prior to planting.


- Follow a 60-day preharvest interval for preemergent Sorghum forage use and a 45-day preharvest interval for postemergent Sorghum forage use.

- Do not graze or feed forage from treated areas for 21 days following application.

- Do not exceed an application rate of 2.0 pounds active ingredient of atrazine per acre for any single application, and the total pounds of atrazine applied (pounds active ingredient per acre) must not exceed 2.5 pounds active ingredient per acre per year.

- For all soil applications prior to crop emergence (except for preemergence use on bedded Sorghum in AZ and CA), do not apply to coarse-textured soils, i.e., sand, loamy sand, sandy loam, or to medium and fine-textured soils having less than 1% organic matter, or injury may occur.

- For postemergence applications, do not apply to sand or loamy sand, or injury may occur.

- Postemergence application to Sorghum must be made before crop reaches 12 inches in height.


- Heavy rains immediately following application tend to result in excessive concentrations of herbicide in seed furrow, resulting in possible crop injury. Applications to furrow-planted Sorghum should not be made until furrows are leveled (plow-in). Deep planter marks or seed furrows should also be leveled before application.

- Application made to Sorghum growing under stress caused by minor element deficiency or to Sorghum growing on highly calcareous soils may result in crop injury.

- Following harvest of a treated crop, plow (moldboard or disk-plow) and thoroughly till the soil in the fall or spring to minimize possible injury to rotational spring-seeded crops, regardless of rate used.

- For applications to furrow-irrigated bedded Sorghum in AZ and CA and for postemergence applications plus emulsifiable oil, see additional use precautions under \"Application in water plus emulsifiable oil or oil concentrate.\"

Soil Erodibility Classification: As defined by the Natural Resource Conservation Service

Maximum Rate/Acre: Atrazine 4L should not be applied preplant to Sorghum grown in NM, OK, TX, Western KS, Eastern CO, AR, LA, TN, MS, AL, GA, FL, SC, and NC, or pre-emergence to Sorghum grown in NM, TX, OK, Western KS, Eastern CO, except in Northeastern OK and the Texas Gulf Coast.

In case of planting failures, Sorghum can be replanted into soil previously treated with Atrazine 4L. Do not make a second broadcast application or injury may occur. If Atrazine 4L is applied in a band and Sorghum is replanted in the untreated row middles, Atrazine 4L may be applied in a band to the second planting provided the maximum application rate of 2.5 pounds active ingredient per acre atrazine per calendar year is not exceeded.

Note: For best control of Cocklebur and Velvetleaf, do not apply less than the specified 4.0 pints per acre.

- Giant foxtail; Large (hairy) crabgrass; Yellow foxtail; Broadleaf weeds: Cocklebur; Kochia; Lambsquarters; Nightshade; Pigweed: Maximum rate limitations and local resistance may result in suppression only or lack of control. Refer to IMPORTANT NOTE within PRODUCT INFORMATION SECTION of the label.

- Grass weeds: Barnyardgrass (watergrass); Green foxtail; Witchgrass (Panicum capillare); Velvetleaf (buttonweed): Suppression or partial control only on medium and fine textured soils.

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 there will be no contact with anything that has been treated.