Herbicide label

MCPA Ester 4

MCPA Ester 4 (EPA 42750-23) is a Group 4 mcpa herbicide labeled for 6 crops. The label lists 17 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

MCPA Ester 4 label facts

Crops on the MCPA Ester 4 label

MCPA Ester 4 is labeled for these 6 crops and uses, per the EPA label.

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Weeds on the MCPA Ester 4 label

The MCPA Ester 4 label names 30 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 control17
  • beggarticks
  • cocklebur, common
  • dragonhead mint
  • goatsbeard
  • hempnettle
  • lambsquarters
  • marshelder
  • mustards, annual
  • peppergrass, field
  • poison hemlock
  • puncturevine
  • radish, wild
  • ragweed, giant
  • shepherd's-purse
  • sowthistle, annual
  • stinkweed
  • rocket, yellow

Partial control

partial13
  • buttercup
  • chervil
  • dandelions
  • kochia
  • miner's lettuce
  • pigweed, russian
  • plantain
  • purslane
  • stinging nettle
  • sunflower
  • thistle, canada
  • vetch
  • whitetop

Weed indexes featuring this label

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MCPA Ester 4 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.

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MCPA Ester 4 FAQ

What weeds does MCPA Ester 4 control?

The MCPA Ester 4 label names 30 weeds, including beggarticks, common cocklebur, dragonhead mint, goatsbeard, hempnettle, and lambsquarters. Control varies by crop, rate, and timing.

What crops is MCPA Ester 4 labeled for?

MCPA Ester 4 is labeled for 6 crops and uses, including wheat, barley, durum wheat, oats, and cereal rye.

What is the active ingredient in MCPA Ester 4? Is it a generic?

MCPA Ester 4's active ingredient is mcpa (MOA Group 4). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.

Can I tank-mix MCPA Ester 4?

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.