Herbicide label
Priority MA Herbicide Label
Priority MA (EPA 42750-344) is a Group 5, 15, and 27 atrazine, mesotrione, and metolachlor herbicide labeled for 6 crops. The label lists 64 controlled weeds, plus partial-control, suppression, and partner-control categories.
Priority MA label facts
- Product Priority MA
- EPA Reg. No. 42750-344
- Registrant Albaugh, LLC
- Active ingredient atrazine, mesotrione, and metolachlor
- MOA group 5, 15, and 27
Crops on the Priority MA label
Priority MA is labeled for these 6 crops and uses, per the EPA label.
Weeds on the Priority MA label
The Priority MA label names 73 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 control64- amaranth, palmer
- amaranth, powell
- barnyardgrass, common
- beggarweed, florida
- buckwheat, wild
- buffalobur
- carpetweed
- chickweed, common
- cocklebur, common
- crabgrass
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- deadnettle, purple
- devil's claw
- foxtail, giant
- foxtail, green
- foxtail, millet
- foxtail, robust
- foxtail, yellow
- galinsoga
- goosegrass
- henbit
- horseweed
- jimsonweed
- kochia
- lambsquarters, common
- mallow, venice
- morningglory, entireleaf
- morningglory, ivyleaf
- mustard, wild
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- nutsedge, yellow
- panicum, browntop
- panicum, fall
- pigweed, redroot
- pigweed, smooth
- purslane, common
- pusley, florida
- radish, wild
- ragweed, common
- ragweed, giant
- red rice
- sesbania, hemp
- shepherd's-purse
- sida, prickly
- signalgrass, broadleaf
- signalgrass, narrowleaf
- smartweed, ladysthumb
- smartweed, pennsylvania
- sprangletop, red
- starbur, bristly
- sunflower, annual
- velvetleaf
- waterhemp, common
- witchgrass
- dandelion
- hemp
- horsenettle
- pokeweed, common
- potatoes, volunteer
- thistle, canada
Suppression
suppression9- bedstraw, catchweed
- cupgrass, woolly
- johnsongrass, seedling
- millet, wild-proso
- panicum, texas
- puncturevine
- sandbur, field
- shattercane
- sicklepod
Priority MA 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.
Priority MA FAQ
What weeds does Priority MA control?
The Priority MA label names 73 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, florida beggarweed, wild buckwheat, and buffalobur. Control varies by crop, rate, and timing.
What crops is Priority MA labeled for?
Priority MA is labeled for 6 crops and uses, including field corn, sorghum, corn silage, sweet corn, and popcorn.
What is the active ingredient in Priority MA? Is it a generic?
Priority MA's active ingredient is atrazine, mesotrione, and metolachlor (MOA Group 5, 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.