Herbicide label
ZONE 4F Herbicide Label
ZONE 4F (EPA 74530-63) is a Group 14 sulfentrazone herbicide labeled for 8 crops. The label lists 26 controlled weeds, plus partial-control, suppression, and partner-control categories.
“The active ingredient in ZONE 4F herbicide is a potent inhibitor of the enzyme Protoporpyrinogen Oxidase IX (PPO IX) which is essential for the formation of chlorophyll. Inhibition of PPO IX enzyme results in the liberation of singlet oxygen (0) that, in turn, disrupts cellular membranes and causes cellular injury and leakage.”
ZONE 4F label facts
- Product ZONE 4F
- EPA Reg. No. 74530-63
- Registrant Helm Agro US, Inc.
- Active ingredient sulfentrazone
- MOA group 14
Crops on the ZONE 4F label
ZONE 4F is labeled for these 8 crops and uses, per the EPA label.
Weeds on the ZONE 4F label
The ZONE 4F label names 26 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 control26- amaranth, palmer
- sida, prickly
- amaranth, powell
- bedstraw, catchweed
- mayweed, chamomile
- shepherd's-purse
- toadflax, yellow
- copperleaf, hophornbeam
- filaree, redstem
- kochia
- nightshade, eastern black
- lambsquarters, common
- thistle, russian
- waterhemp, common
- morningglory, entireleaf
- morningglory, ivyleaf
- pigweed, redroot
- morningglory, palmleaf
- morningglory, purple
- morningglory, scarlet
- morningglory, smallflower
- nightshade, black
- morningglory, red
- morningglory, tall
- nutsedge, yellow
- pigweed, smooth
ZONE 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.
ZONE 4F FAQ
What weeds does ZONE 4F control?
The ZONE 4F label names 26 weeds, including palmer amaranth, prickly sida, powell amaranth, catchweed bedstraw, chamomile mayweed, and shepherd's-purse. Control varies by crop, rate, and timing.
What crops is ZONE 4F labeled for?
ZONE 4F is labeled for 8 crops and uses, including soybeans, sunflower, fallow, sugarcane, and cowpea.
What is the active ingredient in ZONE 4F? Is it a generic?
ZONE 4F's active ingredient is sulfentrazone (MOA Group 14). 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.