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Corn - Atrazine use recommendations and precautions
Corn - Atrazine use recommendations and precautions
Preemergencea
On highly erodible soils (as defined be the U.S. Soil Conservation Service)
- Fields where more than 30 percent of the soil is covered with plant residue at planting: Apply a maximum of 2.0 pounds of active ingredient of atrazine per acre as a broadcast spray.
- Fields where less than 30 percent of the soil is covered with plant residue at planting: Apply a maximum of 1.6 pounds of active ingredient of atrazine per acre as a broadcast spray.
On soils that are not highly erodible
- Apply a maximum of 2.0 pounds of active ingredient of atrazine per acre as a broadcast spray.
Postemergence
- If no atrazine was applied prior to crop emergence, use a maximum rate of 2.0 pounds of active ingredient of atrazine per acre.
- If a preemergence application was made in the same calendar year, the combined preemergence and postemergence applications may not exceed 2.5 pounds of active ingredient of atrazine per acre.
Safety Precautions
- Do not mix, load, or apply atrazine within 50 feet of drinking-water wells, livestock-water wells, agricultural-drainage wells, irrigation wells, abandoned wells, or sinkholes.
- Do not mix or load atrazine within 50 feet of intermittent streams, perennial streams, rivers, lakes, or reservoirs.
- Do not apply atrazine within 200 feet of lakes or reservoirs.
- Do not apply atrazine within a 66-foot arc measured from points where surface water runoff enters intermittent streams, perennial streams, or rivers.
a The total amount of atrazine applied preemergence and postemergence combined in 1 calendar year may not exceed 2.5 pounds of active ingredient of atrazine per acre.
