Herbicide label

MCP Ester 4 Herbicide Label

MCP Ester 4 (EPA 34704-992) is a Group 4 mcpa herbicide labeled for 6 crops. The label lists 7 controlled weeds, plus partial-control, suppression, and partner-control categories.

Download the label PDF

MCP Ester 4 label facts

Crops on the MCP Ester 4 label

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

Weeds on the MCP Ester 4 label

The MCP Ester 4 label names 18 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 control7
  • cocklebur, common
  • mustard, annual
  • lambsquarters
  • marshelder
  • pennycress, field
  • rocket, yellow
  • shepherd's-purse

Partial control

partial11
  • buckwheat, wild
  • dandelion
  • hempnettle
  • kochia
  • pigweed
  • plantain
  • purslane
  • ragweed, giant
  • stinging nettle
  • sunflower
  • thistle, canada

Weed indexes featuring this label

MCP 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.

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.

MCP Ester 4 FAQ

What weeds does MCP Ester 4 control?

The MCP Ester 4 label names 18 weeds, including common cocklebur, annual mustard, lambsquarters, marshelder, field pennycress, and yellow rocket. Control varies by crop, rate, and timing.

What crops is MCP Ester 4 labeled for?

MCP Ester 4 is labeled for 6 crops and uses, including wheat, barley, oats, triticale, and durum wheat.

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

MCP 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.

Sources

Last updated 2026-09-17.