Author: Best, Chris
Phone: 512-490-0057 x 225
Organization: U.S. Fish and Wildlife Service
Address: 10711 Burnet Rd, Suite 200, Austin, TX, 78751
Abstract Title: RESTORATION OF NATIVE SUBTROPICAL FOREST IN ABANDONED CROPLAND DOMINATED BY KLEBERG BLUESTEM IN CAMERON COUNTY, TEXAS. Chris Best* and Mick Castillo, U.S. Fish and Wildlife Service.
Abstract Text: The 418-ac Boscaje de la Palma tract, southeast of Brownsville in Cameron County, Texas, was acquired for Lower Rio Grande Valley NWR in 1981. Most of the tract is former irrigated cropland that was abandoned, and has been dominated by introduced invasive grasses since that time. Numerous large wildfires at Boscaje have greatly suppressed the spontaneous regeneration of native woody vegetation, and have threatened adjacent residential developments. The management objective for Boscaje is restoration of diverse, subtropical forest dominated by sabal palm (Sabal mexicana), Texas ebony (Chloroleucon ebano) and anacua (Sideroxylon celastrinum). This is contingent on successful control of the invasive grasses, primarily Kleberg Bluestem (Dichanthium annulatum). Several long-term trials were initiated at Boscaje in 2004, consisting of multiple aerial applications of Fusilade DX, multiple ground applications of glyphosate herbicide, and multiple disk-harrowing followed by multiple ground-applications of glyphosate. Two years after the last treatment, the most effective treatment has been disking followed by 1 year of glyphosate treatment. Aerial Fusilade application had little effect. Native trees, shrubs and understory plants were planted on glyphosate-treated blocks in 2005, and are establishing rapidly. The sites will be monitored annually to determine effectiveness of native plants at limiting future recolonization by Kleberg bluestem and resistance to wildfire.
Presentation Type: Oral Presentation
Presenter Type (Student or Regular):
Session: 8. Old World Bluestem Symposium
Submission Date: 2007-10-23