Herbicide label
Maestro 4EC Herbicide Label
Maestro 4EC (EPA 71368-78) is a Group 6 bromoxynil herbicide labeled for 16 crops. The label lists 55 controlled weeds, plus partial-control, suppression, and partner-control categories.
Maestro 4EC label facts
- Product Maestro 4EC
- EPA Reg. No. 71368-78
- Registrant Nufarm, Inc.
- Active ingredient bromoxynil
- MOA group 6
Crops on the Maestro 4EC label
Maestro 4EC is labeled for these 16 crops and uses, per the EPA label.
Weeds on the Maestro 4EC label
The Maestro 4EC label names 76 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 control55- sowthistle, annual
- nightshade, black
- mustard, blue
- starbur, bristly
- fiddleneck
- cocklebur, common
- lambsquarters, common
- tarweed, common
- nightshade, cutleaf
- nightshade, eastern black
- pennycress, field
- smartweed, green
- nightshade, hairy
- jimsonweed
- ladysthumb
- sage, lanceleaf
- smartweed, pennsylvania
- pepperweed
- shepherd's-purse
- nightshade, silverleaf
- buckwheat, tartary
- sunflower
- buckwheat, wild
- buffalobur
- burcucumber
- cluster flower
- groundsel, common
- ragweed, common
- chamomile, corn
- gromwell, corn
- cockle, cow
- devilsclaw
- ragweed, giant
- sesbania, hemp
- copperleaf, hophornbeam
- morningglory, ivyleaf
- knawel
- kochia
- rocket, london
- morningglory, pitted
- sunflower, prairie
- knotweed, prostrate
- puncturevine
- pigweed, redroot
- thistle, russian
- pigweed, spiny
- morningglory, tall
- waterhemp, common
- mustard, tumble
- velvetleaf
- mallow, venice
- mustard, wild
- radish, wild
- croton, woolly
- starthistle, yellow
Suppression
suppression2- mayweed
- thistle, canada
Controls with a tank-mix partner
needs partner20- morningglory, entireleaf
- horseweed
- morningglory, palmleaf
- pokeweed, common
- sida, prickly
- morningglory, purple
- morningglory, smallflower
- pigweed, smooth
- spurge, toothed
- bindweed, field
- foxtail, giant
- henbit
- mustard, tansy
- chickweed
- thistle, canada
- filaree, broadleaf
- dogfennel
- foxtail, green
- wild oats
- ryegrass, annual
Maestro 4EC 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.
Maestro 4EC FAQ
What weeds does Maestro 4EC control?
The Maestro 4EC label names 76 weeds, including annual sowthistle, black nightshade, blue mustard, bristly starbur, fiddleneck, and common cocklebur. Control varies by crop, rate, and timing.
What crops is Maestro 4EC labeled for?
Maestro 4EC is labeled for 16 crops and uses, including field corn, wheat, barley, sorghum, and alfalfa.
What is the active ingredient in Maestro 4EC? Is it a generic?
Maestro 4EC's active ingredient is bromoxynil (MOA Group 6). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
Sources
Last updated 2026-09-17.