Herbicide label
Spur Herbicide Label
Spur (EPA 42750-89) is a Group 4 clopyralid herbicide labeled for 14 crops. The label lists 54 controlled weeds, plus partial-control, suppression, and partner-control categories.
Spur label facts
- Product Spur
- EPA Reg. No. 42750-89
- Registrant Albaugh, LLC
- Active ingredient clopyralid
- MOA group 4
Crops on the Spur label
Spur is labeled for these 14 crops and uses, per the EPA label.
Weeds on the Spur label
The Spur label names 59 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- jerusalem artichoke
- black medic
- clover, hop
- clover, red
- clover, white
- groundsel, common
- pineapple-weed
- buckwheat, wild
- burdock
- coffeeweed
- cornflower
- daisy, oxeye
- hawksbeard, narrowleaf
- hawkweed, orange
- hawkweed, yellow
- horseweed
- knapweed, diffuse
- knapweed, spotted
- locoweed, lambert
- locoweed, white
- marshelder
- salsify, meadow
- sicklepod
- sorrel, red
- starthistle, yellow
- teasel, common
- thistle, artichoke
- thistle, bull
- thistle, italian
- thistle, musk
- vetch
- alfalfa
- lentil, volunteer
- pea, volunteer
- volunteer soybean
- chamomile, false
- mayweed, chamomile
- dandelion
- dock, curly
- nightshade, black
- nightshade, cutleaf
- nightshade, eastern black
- nightshade, hairy
- wormwood, biennial
- cocklebur, common
- jimsonweed
- ragweed, giant
- galinsoga
- prickly lettuce
- sweetclover
- ragweed, common
- sowthistle, annual
- sunflower
- thistle, canada
Suppression
suppression5- sowthistle, perennial
- buffalobur
- knapweed, russian
- ladysthumb
- smartweed, green
Spur 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.
Spur FAQ
What weeds does Spur control?
The Spur label names 59 weeds, including jerusalem artichoke, black medic, hop clover, red clover, white clover, and common groundsel. Control varies by crop, rate, and timing.
What crops is Spur labeled for?
Spur is labeled for 14 crops and uses, including field corn, wheat, sugar beet, canola, and barley.
What is the active ingredient in Spur? Is it a generic?
Spur'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.