Herbicide label

Hamper Herbicide Label

Hamper (EPA 55467-18) is a Group 15 metolachlor herbicide labeled for 19 crops. The label lists 42 controlled weeds, plus partial-control, suppression, and partner-control categories.

“This product is a pre-emergent herbicide absorbed by weeds shortly after germination that inhibits weed root and shoot development.”

— Hamper EPA label, Reg. No. 55467-18

Hamper label facts

Crops on the Hamper label

Hamper is labeled for these 19 crops and uses, per the EPA label.

Weeds on the Hamper label

The Hamper label names 78 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 control42
  • amaranth, palmer
  • amaranth, powell
  • barnyardgrass, common
  • bentgrass
  • bluegrass, annual
  • bluegrass, kentucky
  • bluegrass, roughstalk
  • brome, california
  • brome, downy
  • carpetweed
  • crabgrass, large
  • crabgrass, smooth
  • crowfootgrass
  • cupgrass, prairie
  • cupgrass, southwestern
  • fine fescue
  • rattail fescue
  • fescue, tall
  • foxtail, bristly
  • foxtail, giant
  • foxtail, green
  • foxtail, millet
  • foxtail, yellow
  • galinsoga, hairy
  • galinsoga, smallflower
  • goosegrass
  • nightshade, eastern black
  • nutsedge, yellow
  • orchardgrass
  • panicum, fall
  • pigweed, prostrate
  • pigweed, redroot
  • pigweed, smooth
  • pigweed, tumble
  • pusley, florida
  • red rice
  • ryegrass, italian
  • ryegrass, perennial
  • signalgrass, broadleaf
  • dayflower, benghal
  • waterhemp, common
  • witchgrass

Partial control

partial12
  • beggarweed, florida
  • cupgrass, woolly
  • eclipta
  • johnsongrass, seedling
  • millet, wild-proso
  • nightshade, hairy
  • panicum, texas
  • purslane, common
  • sandbur, field
  • sandbur, southern
  • shattercane
  • sorghum, volunteer

Controls with a tank-mix partner

needs partner24
  • cocklebur, common
  • jimsonweed
  • kochia
  • lambsquarters
  • morningglory
  • mustard, wild
  • panicum, browntop
  • ragweed, giant
  • sida, prickly
  • smartweed
  • velvetleaf
  • coffeeweed
  • groundcherry
  • junglerice
  • malva
  • wild oats
  • mallow, venice
  • sesbania, hemp
  • stinging nettle
  • spurge, annual
  • spurge, hyssop
  • spurge, nodding
  • spurge, prostrate
  • spurge, spotted

Hamper 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.

Hamper FAQ

What weeds does Hamper control?

The Hamper label names 78 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, bentgrass, annual bluegrass, and kentucky bluegrass. Control varies by crop, rate, and timing.

What crops is Hamper labeled for?

Hamper is labeled for 19 crops and uses, including field corn, soybeans, cotton, sunflower, and potato.

What is the active ingredient in Hamper? Is it a generic?

Hamper's active ingredient is metolachlor (MOA Group 15). 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.