Herbicide label
QUINSTAR Herbicide Label
QUINSTAR (EPA 42750-88) is a Group 4 quinclorac herbicide labeled for 6 crops. The label lists 24 controlled weeds, plus partial-control, suppression, and partner-control categories.
“QUINSTAR® herbicide is a systemic herbicide with plant uptake through both foliage and roots.”
QUINSTAR label facts
- Product QUINSTAR
- EPA Reg. No. 42750-88
- Registrant Albaugh, LLC
- Active ingredient quinclorac
- MOA group 4
Crops on the QUINSTAR label
QUINSTAR is labeled for these 6 crops and uses, per the EPA label.
Weeds on the QUINSTAR label
The QUINSTAR label names 41 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 control24- barnyardgrass, common
- crabgrass, large
- eclipta
- jointvetch, indian
- jointvetch, northern
- junglerice
- morningglory, cypressvine
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, pitted
- morningglory, purple moonflower
- morningglory, tall
- sesbania, hemp
- signalgrass, broadleaf
- bedstraw, catchweed
- bindweed, field
- bindweed, hedge
- clover species
- volunteer flax
- foxtail, giant
- foxtail, green
- foxtail, yellow
- prickly lettuce
Partial control
partial1- alligatorweed
Suppression
suppression11- dandelion
- kochia
- lambsquarters, common
- ragweed, common
- ragweed, giant
- sowthistle, perennial
- spurge, leafy
- sunflower, wild
- thistle, canada
- thistle, russian
- velvetleaf
Controls with a tank-mix partner
needs partner5- cocklebur, common
- dayflower spp.
- nutsedge, yellow
- red rice
- sprangletop
QUINSTAR 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.
QUINSTAR FAQ
What weeds does QUINSTAR control?
The QUINSTAR label names 41 weeds, including common barnyardgrass, large crabgrass, eclipta, indian jointvetch, northern jointvetch, and junglerice. Control varies by crop, rate, and timing.
What crops is QUINSTAR labeled for?
QUINSTAR is labeled for 6 crops and uses, including wheat, sorghum, rice, grass seed, and fallow.
What is the active ingredient in QUINSTAR? Is it a generic?
QUINSTAR's active ingredient is quinclorac (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.