Herbicide label
Empyros Herbicide Label
Empyros (EPA 5905-641) is a Group 15 and 27 metolachlor and tolpyralate herbicide labeled for 4 crops. The label lists 50 controlled weeds, plus partial-control, suppression, and partner-control categories.
Empyros label facts
- Product Empyros
- EPA Reg. No. 5905-641
- Registrant Helena Agri-Enterprises, LLC, d/b/a Helena Chemical Comp
- Active ingredient metolachlor and tolpyralate
- MOA group 15 and 27
Crops on the Empyros label
Empyros is labeled for these 4 crops and uses, per the EPA label.
Weeds on the Empyros label
The Empyros label names 64 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 control50- amaranth, palmer
- amaranth, powell
- barnyardgrass, common
- buffalobur
- carpetweed
- cocklebur, common
- crabgrass, large
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- cupgrass, woolly
- foxtail, giant
- foxtail, green
- foxtail, millet
- foxtail, robust
- foxtail, yellow
- galinsoga
- goosegrass
- jimsonweed
- lambsquarters, common
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- nutsedge, yellow
- panicum, browntop
- panicum, fall
- pigweed, redroot
- pigweed, smooth
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- red rice
- smartweed, ladysthumb
- smartweed, pennsylvania
- sprangletop, red
- velvetleaf
- waterhemp, common
- witchgrass
- hemp
- henbit
- horsenettle
- horseweed
- mustard, blue
- mustard, wild
- pokeweed, common
- potatoes, volunteer
- sowthistle, annual
- sunflower
- sunflower, wild
Partial control
partial14- johnsongrass, seedling
- kochia
- millet, wild-proso
- morningglory, entireleaf
- morningglory, ivyleaf
- panicum, texas
- sandbur, field
- shattercane
- sida, prickly
- signalgrass, broadleaf
- dandelion
- morningglory, tall
- sorghum, volunteer
- thistle, canada
Empyros 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.
Empyros FAQ
What weeds does Empyros control?
The Empyros label names 64 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, buffalobur, carpetweed, and common cocklebur. Control varies by crop, rate, and timing.
What crops is Empyros labeled for?
Empyros is labeled for 4 crops and uses, including field corn, seed corn, sweet corn, and popcorn.
What is the active ingredient in Empyros? Is it a generic?
Empyros's active ingredient is metolachlor and tolpyralate (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.