Native Forb Response to Aminocyclopyrachlor

Carter, Travis R.; Lym, Rodney G.

doi:10.1017/inp.2018.5

Cited by 1 publication

(2 citation statements)

References 13 publications

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“…Decreases in species richness were also observed from one picloram treatment at this site as well. These findings support extensive research showing decreases in native forb abundance from picloram applications and more recent work showing transient forb decreases from aminocyclopyrachlor applications (Arnold and Santelmann 1966;Carter and Lym 2018;Greet et al 2016;Ortega and Pearson 2011;Thilmony and Lym 2017;Wagner and Nelson 2014).…”

Section: Impacts To Community Compositionsupporting

confidence: 88%

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Effect of indaziflam on native species in natural areas and rangeland

Clark

Sebastian

Nissen

et al. 2019

Invasive plant sci. manag.

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Minimizing the negative ecological impacts of exotic plant invasions is one goal of land management. Using selective herbicides is one strategy to achieve this goal; however, the unintended consequences of this strategy are not always fully understood. The recently introduced herbicide indaziflam has a mode of action not previously used in non-crop weed management. Thus, there is limited information about the impacts of this active ingredient when applied alone or in combination with other non-crop herbicides. The objective of this research was to evaluate native species tolerance to indaziflam and imazapic applied alone and with other broadleaf herbicides. Replicated field plots were established at two locations in Colorado with a diverse mix of native forbs and grasses. Species richness and abundance were compared between the nontreated control plots and plots where indaziflam and imazapic were applied alone and in combination with picloram and aminocyclopyrachlor. Species richness and abundance did not decrease when indaziflam or imazapic were applied alone; however, species abundance was reduced by treatments containing picloram and aminocyclopyrachlor. Species richness was only impacted at one site 1 yr after treatment (YAT) by these broadleaf herbicides. Decreases in abundance were mainly due to reductions in forbs that resulted in a corresponding increase in grass cover. Our data suggest that indaziflam will control downy brome (Bromus tectorumL.) for multiple years without reduction in perennial species richness or abundance. IfB. tectorumis present with perennial broadleaf weeds requiring the addition of herbicides like picloram or aminocyclopyrachlor, forb abundance could be reduced, and in some cases there could be a temporary reduction in perennial species richness.

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Section: Impacts To Community Compositionsupporting

confidence: 88%

“…Much of the research examining herbicide impacts on native species abundance is compounded by noxious weed competition at the site (Arnold and Santelmann 1966;Beran et al 1999;Carter and Lym 2018;Davies and Sheley 2011;Elseroad and Rudd 2011). This can make separating herbicide impacts from invasion impacts difficult.…”

Section: Impacts To Community Compositionmentioning

confidence: 99%