Herbicide label
Clean Slate Herbicide Label
Clean Slate (EPA 228-491) is a Group 4 clopyralid herbicide labeled for 14 crops. The label lists 53 controlled weeds, plus partial-control, suppression, and partner-control categories.
Clean Slate label facts
- Product Clean Slate
- EPA Reg. No. 228-491
- Registrant Nufarm Americas, Inc.
- Active ingredient clopyralid
- MOA group 4
Crops on the Clean Slate label
Clean Slate is labeled for these 14 crops and uses, per the EPA label.
Weeds on the Clean Slate label
The Clean Slate label names 58 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 control53- alfalfa
- jerusalem artichoke
- beans, volunteer
- burdock
- coffeeweed
- cornflower
- daisy, oxeye
- hawksbeard, narrowleaf
- hawkweed, orange
- hawkweed, yellow
- horseweed
- knapweed, diffuse
- knapweed, spotted
- lentil, volunteer
- locoweed, lambert
- locoweed, white
- marshelder
- pea, volunteer
- salsify, meadow
- sicklepod
- sorrel, red
- volunteer soybean
- starthistle, yellow
- teasel, common
- thistle, bull
- thistle, musk
- vetch
- buckwheat, wild
- chamomile, false
- mayweed, chamomile
- dandelion
- dock, curly
- nightshade, cutleaf
- nightshade, eastern black
- sunflower
- wormwood, biennial
- clover, black medic
- clover, hop
- clover, red
- clover, white
- cocklebur, common
- groundsel, common
- jimsonweed
- pineapple-weed
- ragweed, giant
- sweetclover
- galinsoga
- prickly lettuce
- ragweed, common
- nightshade, black
- nightshade, hairy
- thistle, canada
- sowthistle, annual
Suppression
suppression5- buffalobur
- knapweed, russian
- ladysthumb
- sowthistle, perennial
- smartweed, green
Clean Slate 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.
Clean Slate FAQ
What weeds does Clean Slate control?
The Clean Slate label names 58 weeds, including alfalfa, jerusalem artichoke, volunteer beans, burdock, coffeeweed, and cornflower. Control varies by crop, rate, and timing.
What crops is Clean Slate labeled for?
Clean Slate is labeled for 14 crops and uses, including field corn, wheat, sugar beet, canola, and barley.
What is the active ingredient in Clean Slate? Is it a generic?
Clean Slate'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.