Early travelers on the Journada del Muerto such as Susan Shelby Magoffin of El Paso reported in her diary that the area was predominately grama grass. Interpretations from an 1858 land survey indicate much larger areas of grassland than today. Shrubs were restricted to gravelly upland, arroyos and river sites. Early researchers at the CDRRC such as Ken Valentine and John Norris saw an increase in the number of undesirable shrubs and the reduction in the size of grassland... The decision was made to begin a brush control program that would try to preserve the desert grassland for future researchers. Today that program continues to control shrub invasion which threatens to eliminate much of the grassland.
The following maps have been constructed to allow researchers to be aware of when and where herbicide applications have been made at the ranch.
Small Experimental Herbicide Plots
|ID||DESCRIPTION||PASTURE||HERBICIDE||DESCRIPTION||YEAR OF TREATMENT|
|1||Velpar exclosure||15||Velpar||Grid Application + Individual||1981|
|2||W. Hoffler Velpar Site||12||Velpar||Grid Application + Individual||1982|
|3||W. Hoffler Velpar Site||12||Velpar||Grid Application + Individual||1982|
|4||W. Hoffler Velpar Site||13||Velpar||Grid Application + Individual||1982|
|5||W. Hoffler Velpar Site||10||Velpar||Grid Application + Individual||1982|
|6||Initial Velar Research Site||14||Velpar||Grid Application||1979|
|7||Elanco Brush Bullet Rate Trials||14||Tebuthiuron||Individual Latr-Prgl||7 Sept 1983|
|8||Elanco Brush Bullet Rate Trials||12||Tebuthiuron||Individual Latr-Prgl||6 Oct 1983|
|9||Elanco Brush Bullet Rate Trials||14||Tebuthiuron||Individual Latr-Prgl||6 Oct 1983|
|10||Elanco Brush Bullet Rate Trials||14||Tebuthiuron||Individual Latr-Prgl||6 Oct 1983|
|11||Velpar Individual Creosote Treatment and Grid||14||Velpar||Grid Application + Individual||1980|
|12||Banvel, Tordon and Pramitol Aerial Application||12||Banvel, Tordon and Pramitol||366m x 265m||13 Jan 1977|
|13||Banvel, Tordon and Pramitol Aerial Application||12||Banvel, Tordon and Pramitol||366m x 265m||13 Jan 1977|
|14||Banvel, Tordon and Pramitol Aerial Application||12||Banvel, Tordon and Pramitol||366m x 265m||13 Jan 1977|
|15||Banvel, Tordon and Pramitol Aerial Application||10||Banvel, Tordon and Pramitol||July 1976|
|16||Banvel, Tordon and Pramitol Aerial Application||10||Banvel, Tordon and Pramitol||July 1976|
|17||Banvel, Tordon and Pramitol Aerial Application||10||Banvel, Tordon and Pramitol||July 1976|
|18||Pramitol Ground Application||13||Pramitol||1979|
|19||Velpar Individual Mesquite Treatment||14||Velpar||1980|
|20||Snakeweed Test Plots||3W||Variety||McDaniel Data||1979|
|21||Snakeweed Test Plots||13||Variety||1977|
|22||Snakeweed Test Plots||3W||Variety||1977|
|23||Snakeweed Test Plots||3S||Variety||1977|
|24||Leased Mesquite Herbicide Plot||15||Unknown||~1983|
|25||Pramitol Ground Application||12||Pramitol||1979|
In 1984 and 1985 large experimental plots were treated with various herbicides at different rates. These plots were applied with a fixed wing aircraft.
Recent Individual Plant Treratments
Since 1985, only individual mesquite plants have been treated. In general, only plants interferring with roadways, pasture fences or creating difficulties when handling animals have been subject to treatment.