Herbicide label
Harness MAX Herbicide Label
Harness MAX (EPA 524-636) is a Group 15 and 27 acetochlor and mesotrione herbicide labeled for 3 crops. The label lists 82 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Harness® MAX Herbicide is a broad-spectrum preemergence and postemergence herbicide for weed control in field corn, production seed corn, and yellow popcorn.”
Harness MAX label facts
- Product Harness MAX
- EPA Reg. No. 524-636
- Registrant Bayer CropScience
- Active ingredient acetochlor and mesotrione
- MOA group 15 and 27
Crops on the Harness MAX label
Harness MAX is labeled for these 3 crops and uses, per the EPA label.
Weeds on the Harness MAX label
The Harness MAX label names 108 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 control82- amaranth, palmer
- amaranth, powell
- amaranth, spiny
- atriplex
- barnyardgrass, common
- signalgrass, broadleaf
- buffalobur
- burclover, california
- carpetweed
- carrot, wild
- chickweed, common
- chickweed, mouseear
- cocklebur, common
- crabgrass, large
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- cupgrass, woolly
- dandelion, common (seedling)
- deadnettle, purple
- dock, curly
- eveningprimrose, cutleaf
- fiddleneck
- filaree, redstem
- filaree, whitestem
- fleabane, hairy
- foxtail, giant
- foxtail, green
- foxtail, robust (purple, white)
- foxtail, yellow
- galinsoga
- carolina geranium
- goosegrass
- groundcherry, smooth
- groundsel, common
- hemp
- henbit
- horsenettle
- horseweed
- jimsonweed
- lambsquarters, common
- prickly lettuce
- mallow, common
- mayweed, chamomile
- mustard, wild
- nettle, burning
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- panicum, browntop
- panicum, fall
- pansy
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- pineapple-weed
- pokeweed, common
- potatoes, volunteer
- puncturevine, common
- purslane, common
- pusley, common
- ragweed, common
- ragweed, giant
- redmaids
- red rice
- rocket, london
- sesbania, hemp
- shepherd's-purse
- smartweed, ladysthumb
- smartweed, pale
- smartweed, pennsylvania
- sowthistle, annual
- needles, spanish
- sprangletop, red
- sunflower, annual
- swinecress
- tasselflower, red
- velvetleaf
- vetch
- waterhemp, common
- willowherb, panicle
- witchgrass
Partial control
partial26- beggarweed, florida
- buckwheat, wild
- burcucumber
- groundcherry, cutleaf
- johnsongrass, seedling
- knotweed, prostrate
- kochia
- foxtail, millet
- millet, wild-proso
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, pitted
- morningglory, smallflower
- morningglory, tall
- mustard
- nutsedge, yellow
- wild oats
- panicum, texas
- sandbur, field
- shattercane
- sicklepod
- sida, prickly
- starbur, bristly
- thistle, canada
- vetch, purple
- volunteer wheat
Harness MAX 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.
Harness MAX FAQ
What weeds does Harness MAX control?
The Harness MAX label names 108 weeds, including palmer amaranth, powell amaranth, spiny amaranth, atriplex, common barnyardgrass, and broadleaf signalgrass. Control varies by crop, rate, and timing.
What crops is Harness MAX labeled for?
Harness MAX is labeled for 3 crops and uses, including field corn, seed corn, and popcorn.
What is the active ingredient in Harness MAX? Is it a generic?
Harness MAX's active ingredient is acetochlor and mesotrione (MOA Group 15 and 27). 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.