Herbicide label
Opti-Amine Herbicide Label
Opti-Amine (EPA 5905-501) is a Group 4 2,4-d herbicide labeled for 11 crops. The label lists 132 controlled weeds, plus partial-control, suppression, and partner-control categories.
Opti-Amine label facts
- Product Opti-Amine
- EPA Reg. No. 5905-501
- Registrant Helena Agri-Enterprises, LLC, d/b/a Helena Chemical Comp
- Active ingredient 2,4-d
- MOA group 4
Crops on the Opti-Amine label
Opti-Amine is labeled for these 11 crops and uses, per the EPA label.
Weeds on the Opti-Amine label
The Opti-Amine label names 150 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 control132- alfalfa
- alligatorweed
- annual broadleaf weeds
- arrowhead
- artichoke
- aster
- austrian fieldcress
- beggarticks
- biden
- biennial broadleaf weeds
- bitter wintercress
- bittersweet
- sneezeweed, bitter
- blackedeyed susan
- blessed thistle
- blue lettuce
- box elder
- broadleaf weeds
- broomweed, annual
- buckhorn
- thistle, bull
- bulrush
- ragweed, bur
- burdock
- buttercup
- carpetweed
- catnip
- chickweed
- chicory
- cinquefoil
- cockle
- cocklebur, common
- coffeebean
- coffeeweed
- purslane, common
- creeping jenny
- croton
- curly indigo
- eveningprimrose, cutleaf
- dandelion
- devil's claw
- emerged broadleaf weed seedlings
- existing cover crops
- fleabane, annual
- fixweed
- pusley, florida
- frenchweed
- galinsoga
- goatsbeard
- goosefoot
- gumweed
- heal-all
- hemp
- henbit
- honeysuckle
- horsetail
- indian mallow
- indigo
- jerusalem artichoke
- jewelweed
- jimsonweed
- lambsquarters
- locoweed
- lupines
- marijuana
- marshelder
- mexican weed
- morningglory
- mustards
- nutgrass
- parrot feather
- parsnip
- pennycress, field
- pennywort
- peppergrass
- pepperweed
- perennial broadleaf weeds
- pigweed
- plantain
- poison hemlock
- poison ivy
- pokeweed, common
- poorjoe
- povertyweed
- prickly lettuce
- primrose
- puncturevine
- purslane
- radish, common
- ragweed, giant
- rush
- salsify
- shepherd's-purse
- sicklepod
- bittercress, small-flowered
- southern wild rose
- sowthistle
- needles, spanish
- st. johnswort
- stinging nettles
- stinkweed
- suckers
- sunflower
- sweetclover
- tanweed
- tarweed
- thistles
- toadflax
- tumbleweed
- velvetleaf
- venicemallow
- vetches
- virginia creeper
- water milfoil
- water plantain
- water primrose
- water shield
- carrot, wild
- garlic, wild
- wild lettuce
- mustard, wild
- onion, wild
- parsnip, wild
- radish, wild
- wild rape
- wild strawberry
- sweet potato, wild
- witchweed
- woody plants
- woodworm
- wormseed
- rocket, yellow
Partial control
partial18- bindweed, hedge
- thistle, canada
- docks
- dogbane
- goldenrod
- ground ivy
- hoary cress
- ironweed
- knotweed
- mallow
- muskthistle
- nettles
- orange hawkweed
- clover, red
- thistle, russian
- salt cedar
- smartweeds
- copperleaf, virginia
Opti-Amine 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.
Opti-Amine FAQ
What weeds does Opti-Amine control?
The Opti-Amine label names 150 weeds, including alfalfa, alligatorweed, annual broadleaf weeds, arrowhead, artichoke, and aster. Control varies by crop, rate, and timing.
What crops is Opti-Amine labeled for?
Opti-Amine is labeled for 11 crops and uses, including field corn, soybeans, wheat, barley, and sorghum.
What is the active ingredient in Opti-Amine? Is it a generic?
Opti-Amine's active ingredient is 2,4-d (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.