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
variously called, Dogfennel, Cypress Weed, and Texas Cedar.
Milk Thistle, Silybum marianum
The key to effective thistle control is spraying while the thistles are in the rosette stage of growth (before the flower stalk appears). Biennial thistles in Arkansas are readily controlled with a properly timed application of 2,4-D amine at 1.5 qt/A. Spring applications should be made from late February to early March. Fall applications from late October through November will enhance a thistle control program. Grazon P+D, GrazonNext HL and Dicamba + 2,4-D also provide excellent control of thistles at 1 qt/A.