Herbicide label
Helena Atrazine 4F Herbicide Label
Helena Atrazine 4F (EPA 100-497-5905) is a Group 5 atrazine herbicide labeled for 5 crops. The label lists 37 controlled weeds, plus partial-control, suppression, and partner-control categories.
Helena Atrazine 4F label facts
- Product Helena Atrazine 4F
- EPA Reg. No. 100-497-5905
- Distributor Helena Agri-Enterprises, LLC, d/b/a Helena Chemical Comp
- Active ingredient atrazine
- MOA group 5
Crops on the Helena Atrazine 4F label
Helena Atrazine 4F is labeled for these 5 crops and uses, per the EPA label.
Weeds on the Helena Atrazine 4F label
The Helena Atrazine 4F label names 45 weeds and rates each by how the product handles it: full control, partial control, suppression, or control with a tank-mix partner. A weed can fall at more than one level, because control varies by crop, rate, and timing.
Controls
full control37- alexandergrass
- amaranth
- amaranth, spiny
- barnyardgrass, common
- crabgrass
- crabgrass, large
- fireweed
- foxtail
- junglerice
- paintbrush, flora's
- pellitory
- pigweed
- purslane
- sunflower
- wiregrass
- brome, downy
- buckwheat, wild
- cocklebur, common
- dock, seedling
- groundcherry
- henbit
- jimsonweed
- kochia
- lambsquarters
- lambsquarters, common
- lettuce, wild
- morning glory, annual
- mustard
- nightshade, black
- wild oats
- pennycress, field
- ragweed, giant
- smartweed
- sunflower, wild
- thistle, annual
- thistle, russian
- volunteer wheat
Partial control
partial6- foxtail, giant
- foxtail, green
- foxtail, yellow
- sicklepod
- velvetleaf
- witchgrass
Controls with a tank-mix partner
needs partner2- carpetweed
- panicum, fall
Helena Atrazine 4F rates and plant-back
The label answers both with a table, not a single number. Here is what drives each answer.
Application rate
Your rate depends on your crop.
Get the rate for your field: build a program and FieldMarshal gives you the exact per-acre rate for your crop from the label line.
Plant-back and rotation
Your interval depends on your application rate and the rotational crop.
Get the interval for your rotation: build a program and FieldMarshal gives you the exact plant-back for your rotational crop from the label line.
Helena Atrazine 4F FAQ
What weeds does Helena Atrazine 4F control?
The Helena Atrazine 4F label names 45 weeds, including alexandergrass, amaranth, spiny amaranth, common barnyardgrass, crabgrass, and large crabgrass. Control varies by crop, rate, and timing.
What crops is Helena Atrazine 4F labeled for?
Helena Atrazine 4F is labeled for 5 crops and uses, including field corn, sorghum, sweet corn, sugarcane, and fallow.
What is the active ingredient in Helena Atrazine 4F? Is it a generic?
Helena Atrazine 4F's active ingredient is atrazine (MOA Group 5). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
Sources
Last updated 2026-09-30.