Herbicide label
Zone Defense Herbicide Label
Zone Defense (EPA 74530-91) is a Group 14 flumioxazin and sulfentrazone herbicide labeled for 2 crops. The label lists 101 controlled weeds, plus partial-control, suppression, and partner-control categories.
Zone Defense label facts
- Product Zone Defense
- EPA Reg. No. 74530-91
- Registrant Helm Agro US, Inc.
- Active ingredient flumioxazin and sulfentrazone
- MOA group 14
Crops on the Zone Defense label
Zone Defense is labeled for these 2 crops and uses, per the EPA label.
Weeds on the Zone Defense label
The Zone Defense label names 120 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 control101- amaranth, livid
- amaranth, palmer
- amaranth, powell
- amaranth, spiny
- amaranth, spleen
- anoda, spurred
- bedstraw, catchweed
- carpetweed
- chamomile, false
- brome, downy
- chickweed, common
- chickweed, mouseear
- cockle, white
- copperleaf, hophornbeam
- copperleaf, virginia
- crabgrass, large
- crabgrass, smooth
- crabgrass, southern
- croton, tropic
- crownbeard, golden
- cupgrass, wooly
- cyperus, hedgehog
- daisy, american
- dandelion
- deadnettle, purple
- devilsclaw
- dock, curly
- eclipta
- eveningprimrose, cutleaf
- filaree, redstem
- flixweed
- galinsoga, hairy
- goosegrass
- groundcherry, clammy
- groundcherry, cutleaf
- groundsel, crossleaf
- henbit
- jimsonweed
- kochia
- ladysthumb
- lambsquarters, common
- miner's lettuce
- prickly lettuce
- mallow, common
- horseweed
- mayweed, chamomile
- milkweed, honeyvine
- morning glory, annual
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, purple
- morningglory, red
- morningglory, smallflower
- morningglory, tall
- mustard, tansy
- mustard, tumble
- mustard, wild
- nightshade, black
- nightshade, eastern black
- nutsedge, purple
- nutsedge, yellow
- orchardgrass
- panicum, fall
- pennycress, field
- pigweed
- pigweed, livid
- pigweed, palmer amaranth
- pigweed, powell
- pigweed, redroot
- pigweed, smooth
- pigweed, spiny amaranth
- pigweed, spleen
- plantain, blackseed
- plantain, narrow-leaved
- poinsettia, wild
- poorjoe
- porophyllum
- purslane, common
- ragweed, common
- ragweed, giant
- redmaids
- redweed
- sedge, annual
- senna, coffee
- shepherd's-purse
- sida, prickly
- sida, southern
- smartweed, annual
- smartweed, pennsylvania
- smellmelon
- starbur, bristly
- stinkgrass
- sunflower
- tassleflower, red
- thistle, russian
- toadflax, yellow
- waterhemp, common
- waterprimrose, winged
- witchgrass
- wormwood, biennial
Partial control
partial15- barnyardgrass, common
- bluegrass, annual
- burcucumber
- crabgrass
- foxtail
- johnsongrass, seedling
- mexicanweed
- panicum, texas
- ryegrass, italian
- sesbania, hemp
- sicklepod
- signalgrass, broadleaf
- smartweed, ladysthumb
- velvetleaf
- buckwheat, wild
Suppression
suppression1- weeds at Zone Defense rates as low as 3.33 ounces per acre
Controls with a tank-mix partner
needs partner3- chickweed
- annual grasses
- cocklebur, common
Zone Defense 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 Defense FAQ
What weeds does Zone Defense control?
The Zone Defense label names 120 weeds, including livid amaranth, palmer amaranth, powell amaranth, spiny amaranth, spleen amaranth, and spurred anoda. Control varies by crop, rate, and timing.
What crops is Zone Defense labeled for?
Zone Defense is labeled for 2 crops and uses, including soybeans and fallow.
What is the active ingredient in Zone Defense? Is it a generic?
Zone Defense's active ingredient is flumioxazin and 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.