field of soybeans with pigweed
U of A CES Pasture Weed Control Database
The Pasture Weed Control Database contains the same information and pictures included in the Miscellaneous Publication MP-522. The weeds are arranged alphabetically by scientific name because common names vary. For example, in Arkansas, Eupatorium capillifolium, is variously called, Dogfennel, Cypress Weed, and Texas Cedar.

Brazilian Vervain, Verbena brasiliensis

Verbena brasiliensis

Brazilian Vervain is an erect perennial that grows up to 7 feet. This plant is more common in southern Arkanas and appears to be spreading. Grazon P+D and GrazonNext HL applied in May at 1 qt/A gave 90 to 100% control at 90 days after application.