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.

Texas Bullnettle, Cnidosculus texanus

Cnidosculus texanus

A perennial with a taproot that may extend 6 feet deep. Stems and leaves have stinging spines. The flower is white and about one inch wide. Pasture herbicides are not very effective for controlling this weed. Chaparral at 3.3 oz/A provides suppression.