Herbicide label
Calibra Herbicide Label
Calibra (EPA 100-1673) is a Group 15 and 27 mesotrione and metolachlor herbicide labeled for 6 crops. The label lists 43 controlled weeds, plus partial-control, suppression, and partner-control categories.
Calibra label facts
- Product Calibra
- EPA Reg. No. 100-1673
- Registrant Syngenta Crop Protection, LLC
- Active ingredient mesotrione and metolachlor
- MOA group 15 and 27
Crops on the Calibra label
Calibra is labeled for these 6 crops and uses, per the EPA label.
Weeds on the Calibra label
The Calibra label names 56 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 control43- amaranth, palmer
- amaranth, powell
- barnyardgrass, common
- buffalobur
- carpetweed
- cocklebur, common
- crabgrass, large
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- foxtail, giant
- foxtail, green
- foxtail, yellow
- galinsoga, smallflower
- goosegrass
- hemp
- horsenettle
- horseweed
- jimsonweed
- lambsquarters, common
- foxtail, millet
- mustard, wild
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- nutsedge, yellow
- panicum, fall
- pigweed, redroot
- pigweed, smooth
- pokeweed, common
- potato, volunteer
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- red rice
- signalgrass, browntop
- smartweed, ladysthumb
- smartweed, pennsylvania
- sprangletop, red
- velvetleaf
- waterhemp, common
- witchgrass
Partial control
partial13- cupgrass, woolly
- dandelion
- johnsongrass, seedling
- kochia
- millet, texas
- millet, wild-proso
- morningglory, entireleaf
- morningglory, ivyleaf
- sandbur, field
- shattercane
- sida, prickly
- signalgrass, broadleaf
- thistle, canada
Calibra 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.
Calibra FAQ
What weeds does Calibra control?
The Calibra label names 56 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, buffalobur, carpetweed, and common cocklebur. Control varies by crop, rate, and timing.
What crops is Calibra labeled for?
Calibra is labeled for 6 crops and uses, including field corn, sorghum, seed corn, sweet corn, and popcorn.
What is the active ingredient in Calibra? Is it a generic?
Calibra's active ingredient is mesotrione and metolachlor (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.