Weed Management Handbook

diquat (Reglone)

Rate 0.37 to 0.5 lb ai/A (1.5 to 2 pints/A Reglone).

Time Preharvest desiccation.

Remarks Use 15 gal/A or more of water carrier for ground application. Diquat is a contact herbicide.

See Metolachlor

Trade name(s) Tough

Manufacturer(s) Belchim Crop Protection

Formulation(s) 5 lb/gal emulsifiable concentrate

Remarks Postemergent, contact herbicide that controls annual broadleaf weeds in the two- to four-leaf stage.

Water solubility 1.5 ppm

ethofumesate (Nortron SC, Ethotron)

Carrots only, in Washington only

Rate Coarse soils: 1.5 lb ai/A (48 fl oz/A). Medium-texture and fine soils: 2 lb ai/A (64 fl oz/A)

Time Apply after planting and activate with at least 0.5 inch water. If sufficient water will not be available to incorporate the herbicide, incorporate it mechanically before or at planting.

Trade name(s) Quelex (Component of Quelex along with Florasulam)

Manufacturer(s) Corteva

Formulation(s) premix ingredient with florasulam (Quelex)

Remarks A selective herbicide for controlling broadleaf weeds

Several premixed herbicides are available as listed above. These premixes will broaden the weed control spectrum and may reduce the cost of the overall program.

  • Aminocyclopyrachlor + chlorsulfuron, (Perspective)
  • Aminocyclopyrachlor + metsulfuron, (Streamline)
  • Aminocyclopyrachlor + metsulfuron + imazapyr, (Viewpoint)
  • Aminopyralid + metsulfuron, (Opensight)