Herbicide label
METRIFLEX 4SC Herbicide Label
METRIFLEX 4SC (EPA 71368-128) is a Group 5 metribuzin herbicide labeled for 13 crops. The label lists 128 controlled weeds, plus partial-control, suppression, and partner-control categories.
METRIFLEX 4SC label facts
- Product METRIFLEX 4SC
- EPA Reg. No. 71368-128
- Registrant Nufarm, Inc.
- Active ingredient metribuzin
- MOA group 5
Crops on the METRIFLEX 4SC label
METRIFLEX 4SC is labeled for these 13 crops and uses, per the EPA label.
Weeds on the METRIFLEX 4SC label
The METRIFLEX 4SC label names 166 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 control128- ageratum
- alexandergrass
- cudweed
- euphorbia, wild
- fireweed
- groundsel, cressleaf
- guineagrass
- haole koa
- hialoa
- hilahila
- oat, winter
- paintbrush, flora's
- panicum, broadleaf
- plushgrass
- rattlepod
- richardia
- ricegrass
- rocket, london
- spurge, garden
- spurge, graceful
- tarweed
- wiregrass
- amaranth, palmer
- amaranth, spiny
- amaranth, spleen
- waterhemp, common
- anoda, spurred
- beggarweed, florida
- copperleaf, hophornbeam
- crowfootgrass
- dayflower
- galinsoga
- junglerice
- mexicanweed
- millet, browntop
- redweed
- sesbania
- spurge, spotted
- starbur, bristly
- foxtail barley
- bromegrass, smooth
- cockle, white
- deadnettle, purple
- fleabane, rough
- flixweed
- rocket, yellow
- salsify, meadow
- barley, little
- brome, japanese
- chickweed, mouseear
- pepperweed, virginia
- rescuegrass
- barnyardgrass, common
- ragweed, common
- bindweed, field
- bittercress
- catchfly, conical
- catchweed
- corncockle
- eveningprimrose, cutleaf
- falseflax, smallseed
- fiddleneck, tarweed
- filaree, redstem
- carolina geranium
- gromwell
- miner's lettuce
- polemonium, annual
- radish, wild
- speedwell
- turnip, wild
- bluegrass, annual
- brome, downy
- cheat
- wild oats
- buckwheat, wild
- buffalobur
- ladysthumb
- mallow, venice
- sandbur, field
- sida, prickly
- velvetleaf
- carpetweed
- sicklepod
- chickweed, common
- henbit
- cocklebur, common
- crabgrass, smooth
- jimsonweed
- mustard, indian
- panicum, fall
- cowcockle
- crabgrass
- crabgrass, large
- johnsongrass, seedling
- dandelion
- dogfennel
- foxtail
- foxtail, bristlegrass
- foxtail, bristly
- foxtail, giant
- foxtail, yellow
- foxtail, green
- goosegrass
- horseweed
- knotweed, common
- pusley, florida
- smartweed, swamp
- knotweed, prostrate
- kochia
- mustard, tansy
- mustard, tumble
- lambsquarters, common
- pigweed, redroot
- prickly lettuce
- mustard, blue
- mustard, treacle
- volunteer wheat
- mustard, wild
- pennycress, field
- pigweed, smooth
- pineapple-weed
- purslane, common
- shepherd's-purse
- signalgrass, broadleaf
- smartweed, pennsylvania
- sowthistle
- sunflower
- thistle, russian
Partial control
partial2- knawel
- dock, curly
Suppression
suppression18- horsenettle
- panicum, texas
- poinsettia, wild
- barley, hare
- blackgrass
- bluegrass, bulbous
- brome, ripgut
- buttercup
- vetch, winter
- whitlowgrass, spring
- windgrass, common
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, pitted
- morningglory, tall
- nightshade, hairy
- nutsedge, yellow
- spurry, corn
Controls with a tank-mix partner
needs partner18- burcucumber
- thistle, canada
- cupgrass
- red rice
- sorghum, volunteer
- sprangletop
- stinkgrass
- eclipta
- nightshade, eastern black
- poorjoe
- groundsel, common
- ryegrass
- morningglory, smallflower
- shattercane
- witchgrass
- nightshade, black
- ragweed, giant
- senna, coffee
METRIFLEX 4SC 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.
METRIFLEX 4SC FAQ
What weeds does METRIFLEX 4SC control?
The METRIFLEX 4SC label names 166 weeds, including ageratum, alexandergrass, cudweed, wild euphorbia, fireweed, and cressleaf groundsel. Control varies by crop, rate, and timing.
What crops is METRIFLEX 4SC labeled for?
METRIFLEX 4SC is labeled for 13 crops and uses, including field corn, soybeans, potato, barley, and alfalfa.
What is the active ingredient in METRIFLEX 4SC? Is it a generic?
METRIFLEX 4SC's active ingredient is metribuzin (MOA Group 5). 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.