Field-scale tebuthiuron application on brush-infested rangeland

TitleField-scale tebuthiuron application on brush-infested rangeland
Publication TypeJournal Article
Year of Publication1987
AuthorsGibbens, Robert P., Herbel C.H., Lenz J.M.
JournalWeed Technology
Date Published1987
Keywordsarid rangeland, FLOCE, Flourensia cernua, grass cover, Larrea tridentata, LARTR, PRCJG, prosopis glandulosa

The objective of this study was to determine the effectiveness of tebuthiuron  {N- [5-(1,1-dimethylethyl)-1, 3,4- thiadiazol- 2- yl) -N,N' -dimethylurea} to treat brush-infested arid rangeland under field-scale conditions. A 130- ha tract in southern New Mexico dominated by creosotebush  [Larrea tridentata (Sesse & Moe. ex DC.) Coville #3 LARTR] was treated with pelleted tebuthiuron at 0.4 kg ai/ha. After the fourth season following treatment, control of creosotebush, honey mesquite (Prosopis glandulosa Torr. # PRCJG), and tarbush (Flourensia cernua DC. # FLOCE) was 87, 48, and 100%, respectively. Total shrub density was reduced from 4440 plants/ha to 570 plants/ha. Grass basal area increased from 1.1 to 3.4%. The treatment did not affect forbs greatly. Total herbaceous above-ground biomass production in the fourth season after treatment was 860 kg/ha compared to 140 kg/ha on an adjacent untreated area. Perennial grass production was nearly 11- fold greater on the treated area than on the untreated area.