Herbicide label
Weed Rhap A-4D Herbicide Label
Weed Rhap A-4D (EPA 5905-501) is a Group 4 2,4-d herbicide labeled for 12 crops. The label lists 130 controlled weeds, plus partial-control, suppression, and partner-control categories.
Weed Rhap A-4D label facts
- Product Weed Rhap A-4D
- 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 Weed Rhap A-4D label
Weed Rhap A-4D is labeled for these 12 crops and uses, per the EPA label.
Weeds on the Weed Rhap A-4D label
The Weed Rhap A-4D label names 145 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 control130- alligatorweed
- artichoke
- jerusalem artichoke
- aster
- beggarticks
- bidens
- bindweed, hedge
- sneezeweed, bitter
- bittersweet
- bulrush
- burdock
- buttercup
- carpetweed
- catnip
- cedar, salt
- chickweed
- chickory
- sweetclover
- cockle
- cocklebur, common
- coffeebean
- coffeeweed
- virginia creeper
- hoary cress
- croton
- dandelion
- devil's claw
- dock
- dogbane
- elder, box
- fieldcress, austrian
- fleabane, annual
- flixweed
- frenchweed
- galinsoga
- garlic, wild
- goatsbeard
- goldenrod
- goosefoot
- gumweed
- hawkweed, orange
- heal-all
- poison hemlock
- hemp
- henbit
- honeysuckle
- horsetail
- indigo
- indigo, curly
- ironweed
- ground ivy
- poison ivy
- jenny, creeping
- jewelweed
- jimsonweed
- knotweed
- lambsquarters
- lettuce, blue
- prickly lettuce
- lettuce, wild
- locoweed
- lupine
- mallow
- mallow, indian
- mallow, venice
- marijuana
- marshelder
- milfoil, water
- morningglory
- mustard
- needles, spanish
- nettle
- stinging nettle
- nutgrass
- onion, wild
- parsnip
- parsnip, wild
- pennycress, field
- pennywort
- peppergrass
- pepperweed
- pigweed
- plantain
- water plantain
- pokeweed, common
- poorjoe
- povertyweed
- primrose
- water primrose
- puncturevine
- purslane
- pusley, florida
- radish, common
- radish, wild
- ragweed, giant
- ragweed, bur
- rape, wild
- rocket, yellow
- rose, southern wild
- rush
- salsify
- shepherd's-purse
- shield, water
- sicklepod
- smartweed
- st. johnswort
- stinkweed
- wild strawberry
- sunflower
- susan, blackeyed
- sweet potato, wild
- tanweed
- tarweed
- thistle
- thistle, blessed
- thistle, bull
- thistle, canada
- thistle, musk
- thistle, russian
- sowthistle
- toadflax
- tumbleweed
- velvetleaf
- vervain
- vetch
- weed, mexican
- wintercress, bitter
- witchweed
- wormseed
- wormwood
Partial control
partial15- alfalfa
- bittercress, small-flowered
- bullnettle
- buttercup, smallflowered
- cinquefoil, common
- cinquefoil
- clover, red
- copperleaf, virginia
- eveningprimrose, cutleaf
- carolina geranium
- horseweed
- mousetail
- mustard, wild
- purslane, common
- speedwell
Weed Rhap A-4D 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.
Weed Rhap A-4D FAQ
What weeds does Weed Rhap A-4D control?
The Weed Rhap A-4D label names 145 weeds, including alligatorweed, artichoke, jerusalem artichoke, aster, beggarticks, and bidens. Control varies by crop, rate, and timing.
What crops is Weed Rhap A-4D labeled for?
Weed Rhap A-4D is labeled for 12 crops and uses, including field corn, soybeans, wheat, barley, and sorghum.
What is the active ingredient in Weed Rhap A-4D? Is it a generic?
Weed Rhap A-4D'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.