Herbicide label
Preface Herbicide Label
Preface (EPA 66222-248) is a Group 2 imazethapyr herbicide labeled for 1 crops. The label lists 12 controlled weeds, plus partial-control, suppression, and partner-control categories.
“PREFACE kills weeds by root and/or foliage uptake and rapid translocation to the growing points.”
Preface label facts
- Product Preface
- EPA Reg. No. 66222-248
- Registrant Makhteshim Agan of North America, Inc. d/b/a ADAMA
- Active ingredient imazethapyr
- MOA group 2
Crops on the Preface label
Preface is labeled for these 1 crops and uses, per the EPA label.
Weeds on the Preface label
The Preface label names 30 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 control12- barnyardgrass, common
- crabgrass, large
- johnsongrass, seedling
- red rice
- shattercane
- signalgrass, broadleaf
- morningglory, pitted
- morningglory, palmleaf
- morningglory, cypressvine
- smartweed
- nutsedge, species
- flatsedge, rice
Suppression
suppression12- sprangletop
- alligatorweed
- morningglory, entireleaf
- morningglory, ivyleaf
- dayflower, spreading
- morningglory, tall
- ducksalad
- ammannia, purple
- eclipta
- texasweed
- mexicanweed
- waterplantain
Controls with a tank-mix partner
needs partner12- sesbania, hemp
- dayflower
- ducksalad
- eclipta
- ammannia, purple
- waterplantain
- morningglory
- cocklebur, common
- sprangletop
- mexicanweed
- redweed
- jointvetch
Preface 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.
Preface FAQ
What weeds does Preface control?
The Preface label names 30 weeds, including common barnyardgrass, large crabgrass, seedling johnsongrass, red rice, shattercane, and broadleaf signalgrass. Control varies by crop, rate, and timing.
What crops is Preface labeled for?
Preface is labeled for 1 crops and uses, including rice.
What is the active ingredient in Preface? Is it a generic?
Preface's active ingredient is imazethapyr (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 2026-09-17.