Herbicide label
Flexstar GT 3.5 Herbicide Label
Flexstar GT 3.5 (EPA 100-1385) is a Group 9 and 14 fomesafen and glyphosate herbicide labeled for 2 crops. The label lists 79 controlled weeds, plus partial-control, suppression, and partner-control categories.
Flexstar GT 3.5 label facts
- Product Flexstar GT 3.5
- EPA Reg. No. 100-1385
- Registrant Syngenta Crop Protection, LLC
- Active ingredient fomesafen and glyphosate
- MOA group 9 and 14
Crops on the Flexstar GT 3.5 label
Flexstar GT 3.5 is labeled for these 2 crops and uses, per the EPA label.
Weeds on the Flexstar GT 3.5 label
The Flexstar GT 3.5 label names 81 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 control79- amaranth, palmer
- amaranth, spiny
- anoda, spurred
- barley
- barnyardgrass, common
- bluegrass, annual
- buttercup
- carpetweed
- chickweed, common
- chickweed, mouseear
- citronmelon
- cocklebur, common
- copperleaf, hophornbeam
- copperleaf, virginia
- corn, volunteer
- crabgrass
- crotalaria, showy
- croton, tropic
- deadnettle, purple
- eclipta
- eveningprimrose, cutleaf
- foxtail
- galinsoga
- goosegrass
- groundcherry, cutleaf
- henbit
- jimsonweed
- johnsongrass, seedling
- lambsquarters, common
- mallow, venice
- morningglory
- morningglory, cypressvine
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, pitted
- morningglory, purple moonflower
- morningglory, red
- morningglory, smallflower
- morningglory, tall
- mustard, wild
- nightshade, black
- nightshade, eastern black
- oats
- wild oats
- panicum, browntop
- panicum, fall
- panicum, texas
- pigweed, redroot
- pigweed, smooth
- poinsettia, wild
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- red rice
- redweed
- rocket, yellow
- rye, volunteer
- ryegrass, italian
- sesbania, hemp
- shattercane
- shepherd's-purse
- sicklepod
- sida, prickly
- signalgrass, broadleaf
- smartweed, ladysthumb
- smartweed, pennsylvania
- sprangletop
- spurge, prostrate
- spurge, spotted
- starbur, bristly
- sunflower, annual
- velvetleaf
- waterhemp, common
- volunteer wheat
- millet, wild-proso
- witchgrass
- cupgrass, woolly
Partial control
partial2- nightshade, hairy
- nutsedge, yellow
Flexstar GT 3.5 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.
Flexstar GT 3.5 FAQ
What weeds does Flexstar GT 3.5 control?
The Flexstar GT 3.5 label names 81 weeds, including palmer amaranth, spiny amaranth, spurred anoda, barley, common barnyardgrass, and annual bluegrass. Control varies by crop, rate, and timing.
What crops is Flexstar GT 3.5 labeled for?
Flexstar GT 3.5 is labeled for 2 crops and uses, including soybeans and cotton.
What is the active ingredient in Flexstar GT 3.5? Is it a generic?
Flexstar GT 3.5's active ingredient is fomesafen and glyphosate (MOA Group 9 and 14). 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.