Herbicide label

WEEDESTROY AM-40

WEEDESTROY AM-40 (EPA 228-145) is a Group 4 2,4-d herbicide labeled for 15 crops. The label lists 71 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

WEEDESTROY AM-40 label facts

Crops on the WEEDESTROY AM-40 label

WEEDESTROY AM-40 is labeled for these 15 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 WEEDESTROY AM-40 label

The WEEDESTROY AM-40 label names 74 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 control71
  • jerusalem artichoke
  • aster, many flowered
  • beggarticks
  • bittercress, small-flowered
  • burdock
  • buttercup, smallflowered
  • carrot, wild
  • catnip
  • chicory
  • cinquefoil, common
  • cinquefoil
  • cocklebur, common
  • coffeeweed
  • copperleaf, virginia
  • dandelion
  • dock
  • dogbane
  • evening primrose, common
  • eveningprimrose, cutleaf
  • fleabane, rough
  • galinsoga, hairy
  • garlic, wild
  • carolina geranium
  • goldenrod
  • ground ivy
  • hawkweed, orange
  • heal-all
  • hoary cress
  • horseweed
  • jimsonweed
  • knotweed
  • lambsquarters, common
  • lettuce, blue
  • prickly lettuce
  • lettuce, wild
  • mallow, little
  • mallow, venice
  • marshelder
  • milfoil, water
  • morningglory, common
  • morningglory, ivy
  • morningglory, woolly
  • mustard
  • mustard, wild
  • nettle
  • stinging nettle
  • onion, wild
  • parsnip, wild
  • pennycress, field
  • pepperweed
  • pigweed
  • plantain
  • plantain, common water
  • purslane, common
  • ragweed, common
  • ragweed, giant
  • salsify, common
  • salsify, western
  • smartweed
  • sowthistle, annual
  • sowthistle, perennial
  • sowthistle, spiny
  • speedwell
  • sunflower
  • thistle, bull
  • thistle, canada
  • thistle, musk
  • thistle, russian
  • velvetleaf
  • vervain
  • vetch

Partial control

partial3
  • alfalfa
  • clover, red
  • pigweed

Suppression

suppression3
  • alfalfa
  • bullnettle
  • clover, red

Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.

WEEDESTROY AM-40 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, MN, 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.

WEEDESTROY AM-40 FAQ

What weeds does WEEDESTROY AM-40 control?

The WEEDESTROY AM-40 label names 74 weeds, including jerusalem artichoke, many flowered aster, beggarticks, small-flowered bittercress, burdock, and smallflowered buttercup. Control varies by crop, rate, and timing.

What crops is WEEDESTROY AM-40 labeled for?

WEEDESTROY AM-40 is labeled for 15 crops and uses, including field corn, soybeans, wheat, barley, and sorghum.

What is the active ingredient in WEEDESTROY AM-40? Is it a generic?

WEEDESTROY AM-40'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 WEEDESTROY AM-40?

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.

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Can I tank-mix WEEDESTROY AM-40?

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.

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Sources

Last updated 2026-07-14.