Trade name(s) Karmex, Diuron, Direx, Parrot

Manufacturer(s) DuPont, Griffin Corp., Platte Chemical Co., Dow AgroSciences, ADAMA

Formulation(s) 80% wettable powder, 80% dry flowable, 4 lb/gal water dispersible liquid

Remarks A substituted urea compound used preemergence to control annual weeds and certain perennials in noncropland and certain agricultural crops. Plant roots absorb and translocate material. It is foliar absorbed when used with a wetting agent. Diuron may persist several months in soil.

Water solubility 42 ppm

Storage conditions Stable at moderate temperatures.

Acute toxicity LD50 - 3,400 mg/kg

Action in plant Inhibits photosynthesis.

Site of action Group 7: photosystem II inhibitor

Chemical family Substituted urea

Koc Average is 480 mL/g

Winter Wheat-Nonirrigated East of the Cascades

Drew Lyon and Judit Barroso
Revised March 2016

Downy Brome

flufenacet + metribuzin (Axiom DF)

Suppression only

Rate 0.136 to 0.34 lb/A flufenacet and 0.034 to 0.085 lb/A metribuzin (4 to 10 oz/A Axiom DF)

Time Apply from wheat germination to the two-leaf growth stage.


Don Morishita
Revised March 2016

Preplant and Preemergence Weed Control

carfentrazone (Aim)

Rate 0.008 to 0.031 lb ai/A (0.5 to 2 fl oz/A Aim EC)

Time Apply before, during, or after oats have been planted.


Don Morishita
Revised March 2016

Preplant and Preemergence Weed Control

carfentrazone (Aim EC)

Rate 0.008 to 0.031 lb ai/A (0.5 to 2 fl oz Aim 2EC)

Time Apply before, during, or after grain has been planted.

Control of Problem Weeds

Timothy Prather, Timothy Miller, and Andrew Hulting
Revised June 2016

This section gives information about specific weeds that may be troublesome to control. Herbicides and/or rates listed cannot necessarily be used on cropland. Rates of application and restrictions vary depending on crop or site. Do not apply to a crop or site not listed on the label.

Non-cropland is greenspace where plants are not harvested by humans or animals for food, feed, or fiber; roadsides, for example.

Grass Seed Crops

Andrew Hulting
Revised March 2016

Note Weed control in established perennial grass seed fields depends on effective management of crop residues. If grass seed fields cannot be burned after harvest, the recommended preemergence herbicide treatments may be less effective in controlling weeds. In unburned fields, remove crop residues by baling straw, or spread straw as evenly as possible by mechanical means if a full straw load is desired. Unburned grasses with considerable top regrowth may be damaged by fall-applied treatments made before approximately October 15.

Agrichemicals and Their Properties

Ed Peachey, Tim Miller, and Andy Hulting
Revised March 2016

This information provides specifications for users of this handbook. For more information regarding the physiological or biochemical activity and behavior in or on soils, refer to the Herbicide Handbook of the Weed Science Society of America.

Syndicate content