Caliber, Cobutox, Embutox: 2,4-DB

Trade Names	Formulation	Guaranteed active concentration	Ontario Schedule	Winter Storage	Manufacturer/ Registrant
Caliber 625	Sn	625 g/L	2	B	United Agri Products
Cobutox 625	EC	625 g/L	2	B	Interprovincial Cooperative Ltd.
Embutox 625	EC	625 g/L	2	B	Nufarm Agriculture Inc.

Chemical Family	Phenoxy
Group	4
Crop and/or Non-Crop Registrations	Seedling alfalfa, bird's-foot trefoil, clovers (except sweet) direct seeded or underseeded in spring wheat, barley or oats, and corn.
Sensitive Weeds	Many small broadleaf weeds such as stinkweed, ragweed, lamb's-quarters, wild buckwheat and mustards. Top-growth control of Canada thistle, field bindweed and perennial sow-thistle.
Uptake and Translocation	Absorbed through the foliage and readily translocated to the growing points.
Basis of Selectivity	Sensitive weeds rapidly convert 2,4-DB into 2,4-D; tolerant species do not make this conversion under normal conditions.
Application Methods	Postemergence.
Residual Activity	None.
Unique Characteristics	Mustards are not usually controlled by 2,4-DB alone if sprayed beyond the 4-leaf stage; a tank-mixture with MCPA will improve control of these larger mustards. Injury to alfalfa increases under drought stress, or when alfalfa seedlings have more than 4 leaves.