Herbicide label
Postscript Herbicide Label
Postscript (EPA 66222-271) is a Group 2 imazamox herbicide labeled for 1 crops. The label lists 18 controlled weeds, plus partial-control, suppression, and partner-control categories.
“POSTSCRIPT kills weeds by foliage and/or weed roots uptake and rapid translocation to the growing points.”
Postscript label facts
- Product Postscript
- EPA Reg. No. 66222-271
- Registrant Makhteshim Agan of North America, Inc. d/b/a ADAMA
- Active ingredient imazamox
- MOA group 2
Crops on the Postscript label
Postscript is labeled for these 1 crops and uses, per the EPA label.
Weeds on the Postscript label
The Postscript label names 32 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 control18- barnyardgrass, common
- cocklebur, common
- crabgrass, large
- johnsongrass, seedling
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, smallflower
- morningglory, tall
- panicum, fall
- pigweed, prostrate
- pigweed, redroot
- pigweed, smooth
- pigweed, spiny
- red rice
- signalgrass, broadleaf
- smartweed, ladysthumb
- smartweed, pennsylvania
- smartweed, swamp
Suppression
suppression14- alligatorweed
- ammannia, purple
- arrowhead, common
- dayflower, spreading
- ducksalad
- eclipta
- flatsedge, water
- rhizome johnsongrass
- mexicanweed
- nutsedge, purple
- nutsedge, yellow
- redweed
- texasweed
- water plantain
Postscript 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.
Postscript FAQ
What weeds does Postscript control?
The Postscript label names 32 weeds, including common barnyardgrass, common cocklebur, large crabgrass, seedling johnsongrass, entireleaf morningglory, and ivyleaf morningglory. Control varies by crop, rate, and timing.
What crops is Postscript labeled for?
Postscript is labeled for 1 crops and uses, including rice.
What is the active ingredient in Postscript? Is it a generic?
Postscript's active ingredient is imazamox (MOA Group 2). 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.