Herbicide label

Zone Defense

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.

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Official EPA label (PDF)

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.

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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

partial26

barnyardgrass, common
bluegrass, annual
burcucumber
crabgrass
foxtail
goosegrass
copperleaf, hophornbeam
johnsongrass, seedling
kochia
mexicanweed
panicum, fall
panicum, texas
ragweed, common
ragweed, giant
ryegrass, italian
sesbania, hemp
sicklepod
signalgrass, broadleaf
smartweed, ladysthumb
smartweed, pennsylvania
smellmelon
starbur, bristly
thistle, russian
velvetleaf
buckwheat, wild
wormwood, biennial

Suppression

suppression1

weeds at Zone Defense rates as low as 3.33 ounces per acre

Controls with a tank-mix partner

needs partner8

chickweed
horseweed
ragweed, giant
dandelion
annual grasses
henbit
cocklebur, common
sunflower

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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 and your soil texture.

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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.

What's the plant-back interval after Zone Defense?

It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.

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Can I tank-mix Zone Defense?

It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.