Herbicide label
Sonora Herbicide Label
Sonora (EPA 81927-69) is a Group 4 clopyralid herbicide labeled for 1 crops. The label lists 54 controlled weeds, plus partial-control, suppression, and partner-control categories.
Sonora label facts
- Product Sonora
- EPA Reg. No. 81927-69
- Registrant Alligare, LLC
- Active ingredient clopyralid
- MOA group 4
Crops on the Sonora label
Sonora is labeled for these 1 crops and uses, per the EPA label.
Weeds on the Sonora label
The Sonora 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 control54- acacia
- jerusalem artichoke
- buckwheat, wild
- buffalobur
- burdock
- chamomile, false
- mayweed, chamomile
- clover, hop
- clover, red
- clover, white
- cocklebur, common
- coffeeweed
- cornflower
- daisy, oxeye
- dandelion
- dock, curly
- groundsel, common
- hawksbeard, narrowleaf
- hawkweed, orange
- hawkweed, yellow
- horseweed
- jimsonweed
- knapweed, diffuse
- knapweed, spotted
- ladysthumb
- prickly lettuce
- locoweed, lambert
- locoweed, white
- locust
- marshelder
- black medic
- mesquite
- mimosa
- nightshade, cutleaf
- nightshade, eastern black
- nightshade, hairy
- pineapple-weed
- ragweed, common
- ragweed, giant
- salsify, meadow
- sicklepod
- smartweed, green
- sorrel, red
- sowthistle, annual
- starthistle, yellow
- sunflower
- teasel, common
- thistle, artichoke
- thistle, bull
- thistle, canada
- thistle, Italian
- thistle, musk
- vetch
- wisteria
Suppression
suppression2- knapweed, russian
- sowthistle, perennial
Sonora 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.
Sonora FAQ
What weeds does Sonora control?
The Sonora label names 56 weeds, including acacia, jerusalem artichoke, wild buckwheat, buffalobur, burdock, and false chamomile. Control varies by crop, rate, and timing.
What crops is Sonora labeled for?
Sonora is labeled for 1 crops and uses, including fallow.
What is the active ingredient in Sonora? Is it a generic?
Sonora's active ingredient is clopyralid (MOA Group 4). 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.