Herbicide label
Opti-Amine
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.
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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.
Need the rate or timing for one of these? Filter every label by your crop, free.
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
- 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
- puncture vine
- 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
partial22- alfalfa
- beggarticks
- 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
- garlic, wild
- onion, wild
Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.
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, the rotational crop, and your state, region, and rainfall — some intervals differ in AZ, CA, CO, ID, KS, MT, ND, NE, NM, NV, OK, OR, SD, TX, UT, WA, and WY.
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.
What's the plant-back interval after Opti-Amine?
It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.
Build a program →Can I tank-mix Opti-Amine?
It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.
Build a program →Plan in minutes, not hours.
Start with Opti-Amine and let FieldMarshal build a defensible herbicide program for your field, every product, rate, and plant-back cross-referenced and checked against the label.
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Sources
Last updated 2026-07-14.