Integrating Selective Herbicide and Native Plant Restoration to Control Alternanthera philoxeroides (Alligator Weed) Page: 34
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broad spectrum herbicides to the competition from existing monocot species. After two
experiments, we found no advantage of integrating herbicide applications and introductions of
six species of plants to compete with A. philoxeroides. To fully explore this theoretical
integration of management tools completely, the individual components should be better
understood. It is well reported that herbicides can reduce A. philoxeroides biomass, but further
understanding of herbicide transport, or lack thereof, and effects throughout the entire plant are
needed. Because competitive interactions underground are so important, it may be important to
use herbicides that could directly damage A. philoxeroides roots to improve the magnitude of
competitive responses from other plants. Trials with a larger pool of potential competitors and
their subsequent influence on A. philoxeroides could have allowed for improved competitor plant
selection for this study and resulted in a different outcome. We knew that herbicides would most
likely damage A. philoxeroides, but we had little evidence of A. philoxeroides being directly
suppressed by native plants or how the plant responds physiologically to competition. Further
research is needed relating timing herbicide application and subsequent introduction of plants.
Herbicides chosen may control A. philoxeroides better after late season applications, but opening
an earlier window for response from introduced competitors may improve results over either
individual method. Because of the morphological plasticity of A. philoxeroides, any study
attempting to characterize competitive effects from other plants would certainly have to take
different hydrological regimes and the resulting A. philoxeroides growth forms into account.
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Adams, Justin. Integrating Selective Herbicide and Native Plant Restoration to Control Alternanthera philoxeroides (Alligator Weed), thesis, December 2011; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc103280/m1/41/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .