Herbicide label
Merissa Herbicide Label
Merissa (EPA 83529-171) is a Group 2 metsulfuron-methyl herbicide labeled for 8 crops. The label lists 35 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Merissa is absorbed through the foliage of broadleaf weeds, rapidly inhibiting their growth.”
Merissa label facts
- Product Merissa
- EPA Reg. No. 83529-171
- Registrant Sharda USA LLC
- Active ingredient metsulfuron-methyl
- MOA group 2
Crops on the Merissa label
Merissa is labeled for these 8 crops and uses, per the EPA label.
Weeds on the Merissa label
The Merissa label names 47 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 control35- buttercup, bur (testiculate)
- catchfly, conical
- chamomile, false
- mayweed, chamomile
- chickweed, common
- coreopsis, plains
- cowcockle
- falseflax, smallseed
- fiddleneck, coast (tarweed)
- filaree, broadleaf
- groundsel, common
- henbit
- kochia
- lambsquarters, common
- lambsquarters, slimleaf
- prickly lettuce
- miner's lettuce
- mustard, blue/purple
- mustard, treacle (bushy wallflower)
- mustard, tumble/jim hill
- mustard, wild
- pennycress, field (fanweed)
- purslane, common
- shepherd's-purse
- smartweed, green
- smartweed, ladysthumb
- smartweed, pale
- speedwell, snow
- sunflower
- tansymustard
- thistle, russian
- waterpod
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
Suppression
suppression6- buckwheat, wild
- gromwell, corn
- knotweed, prostrate
- sowthistle, annual
- sunflower, annual
- thistle, canada
Controls with a tank-mix partner
needs partner7- cocklebur, common
- horseweed
- sunflower, annual
- sunflower, wild
- puncturevine
- velvetleaf
- winter annual broadleaf weeds
Merissa 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.
Merissa FAQ
What weeds does Merissa control?
The Merissa label names 47 weeds, including bur (testiculate) buttercup, conical catchfly, false chamomile, chamomile mayweed, common chickweed, and plains coreopsis. Control varies by crop, rate, and timing.
What crops is Merissa labeled for?
Merissa is labeled for 8 crops and uses, including wheat, barley, sorghum, spring wheat, and winter wheat.
What is the active ingredient in Merissa? Is it a generic?
Merissa's active ingredient is metsulfuron-methyl (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.