Herbicide label

Penchant Herbicide Label

Penchant (EPA 34704-1145) is a Group 2 imazethapyr herbicide labeled for 9 crops. The label lists 105 controlled weeds, plus partial-control, suppression, and partner-control categories.

“Penchant, a soluble liquid herbicide, kills when it is taken up by foliage and/or roots of listed broadleaf and grass weeds and sedges, and is translocated rapidly to growing portions of the weeds, where weed growth is stopped.”

— Penchant EPA label, Reg. No. 34704-1145

Penchant label facts

Crops on the Penchant label

Penchant is labeled for these 9 crops and uses, per the EPA label.

Weeds on the Penchant label

The Penchant label names 121 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 control105
  • alligatorweed
  • anoda, spurred
  • jerusalem artichoke
  • barnyardgrass, common
  • bedstraw, catchweed
  • beet, wild
  • starbur, bristly
  • buckwheat, wild
  • buffalobur
  • canarygrass, littleseed
  • carpetweed
  • cereals, volunteer barley
  • cereals, volunteer oat
  • cereals, volunteer wheat
  • chickweed, common
  • chickweed, mouseear
  • cocklebur, common
  • crabgrass, large
  • crabgrass, smooth
  • cupgrass, woolly
  • dandelion
  • devil's claw
  • dock, broadleaf
  • dock, curly
  • dodder
  • fiddleneck
  • filaree, redstem
  • filaree, whitestem
  • fleabane, rough
  • flixweed
  • foxtail, giant
  • foxtail, green
  • foxtail, robust purple
  • foxtail, robust white
  • foxtail, yellow
  • galinsoga
  • goosefoot, nettleleaf
  • goosegrass
  • groundsel, common
  • henbit
  • jimsonweed
  • johnsongrass, seedling
  • kochia
  • knotweed, prostrate
  • lambsquarters, common
  • miner's lettuce
  • mallow, common
  • mallow, little
  • marshelder
  • millet, wild-proso
  • morningglory, entireleaf
  • morningglory, ivyleaf
  • morningglory, pitted
  • morningglory, smallflower
  • morningglory, tall
  • mustard spp.
  • mustard, black
  • mustard, tumble
  • mustard, wild
  • nettle, burning
  • nightshade, black
  • nightshade, eastern black
  • nightshade, hairy
  • pennycress, field
  • pepperweed, field
  • pepperweed, virginia
  • pigweed, redroot
  • pigweed, smooth
  • pigweed, spiny
  • poinsettia, wild
  • puncturevine
  • purslane, common
  • pusley, florida
  • radish, wild
  • ragweed, common
  • ragweed, giant
  • red rice
  • redmaids
  • rocket, london
  • rocket, yellow
  • rockpurslane, desert
  • sage, barnyard
  • shattercane
  • shepherd's-purse
  • sida, prickly
  • signalgrass, broadleaf
  • smartweed, ladysthumb
  • smartweed, pennsylvania
  • smartweed, swamp
  • sorghum, almum
  • spurge, petty
  • spurge, prostrate
  • spurge, spotted
  • spurge, toothed
  • spurry, corn
  • sunflower, annual
  • swinecress
  • tansymustard, green
  • tansymustard, pinnate
  • thistle, canada
  • thistle, russian
  • velvetleaf
  • wartcress, creeping
  • watercress
  • willowleaf, panicle-leaf

Suppression

suppression11
  • bluegrass, annual
  • hoary cress
  • rhizome johnsongrass
  • mallow, venice
  • nutsedge, purple
  • nutsedge, yellow
  • wild oats
  • oxtongue, bristly
  • panicum, fall
  • panicum, texas
  • quackgrass

Controls with a tank-mix partner

needs partner5
  • corn, volunteer
  • junglerice
  • sprangletop, red
  • witchgrass
  • waterhemp, common

Penchant 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.

Penchant FAQ

What weeds does Penchant control?

The Penchant label names 121 weeds, including alligatorweed, spurred anoda, jerusalem artichoke, common barnyardgrass, catchweed bedstraw, and wild beet. Control varies by crop, rate, and timing.

What crops is Penchant labeled for?

Penchant is labeled for 9 crops and uses, including soybeans, peanut, alfalfa, clover, and chickpea.

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

Penchant's active ingredient is imazethapyr (MOA Group 2). 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.