Integrating Selective Herbicide and Native Plant Restoration to Control Alternanthera philoxeroides (Alligator Weed) Page: 25
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Figure 15. Effect of competitor introduction on A. philoxeroides shoot/root ratio. n= 9 for each
treatment. Means are presented + standard error. Different letters indicate significantly different
means (p < 0.05). Nocomp = no competitor introduction. Sag_pla= Sagittari platyphylla.
Car bre = Carex brevior. Pol_den = Polygonum densiflorum. Jus_ame = Justicia american.
A. philoxeroides cover was affected by herbicide application, but not significantly
influenced by competitor introduction or the interaction of competition and herbicide (Table 6)
(Figure 19). Combining individual competitors into monocot or dicot groups did not significantly
alter results (Table 7). Triclopyr reduced A. philoxeroides mean cover significantly over controls
(31.00 + 6.935) after both one application (16.70 + 6.935) and two applications (6.90 + 6.935),
but there was no significant difference in cover between one and two herbicide applications
(Figure 17) (Figure 18). Eight months after initial treatments, A. philoxeroides above ground
parts were not present in six plots that received two applications, two plots that received one
application, and two plots that received zero applications.
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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/m1/32/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .