Repository logo
 

Litter reduction by prescribed burning can extend downy brome control

Simple item page
dc.contributor.authorKessler, Kallie C., author
dc.contributor.authorBeck, K. George, advisor
dc.contributor.authorNissen, Scott J., committee member
dc.contributor.authorMeiman, Paul J., committee member
dc.date.accessioned2007-01-03T06:23:15Z
dc.date.available2016-01-31T06:30:24Z
dc.date.issued2014
dc.description.abstractDowny brome (Bromus tectorum L.) is a highly successful invasive species primarily because it fills an open niche in native plant communities. It also produces large amounts of litter over time. We hypothesized that removing accumulated litter with a prescribed burn before applying herbicides would improve herbicide efficacy, extending the duration of control. In January 2012, two downy brome infested sites were burned. In March 2012, post-emergent applications of glyphosate, imazapic, and tebuthiuron were made in a split-plot design. Aboveground biomass was collected at 6, 18 and 27 months after treatment (MAT) to evaluate treatment effects. In non-burned areas, all herbicide treatments were similar to the control 27 MAT; however, burning combined with imazapic or tebuthiuron reduced downy brome biomass 27 MAT by 81% ± 4.6 SE and 84% ± 19.3 SE, respectively. Remnant species responded positively to burning and herbicide treatments. Native cool season grass biomass increased after burning while native warm season grass biomass increased following tebuthiuron treatments. The impact of litter on imazapic and tebuthiuron availability was also evaluated. Herbicide interception increased in a linear relationship with increasing litter. For every 50 g•m-2 increase in litter there was a 7% increase in the amount of herbicide intercepted, meaning that 75% of the applied herbicide was intercepted by 360 g•m-2 of litter. A simulated rainfall event of 5 mm, 7 days after application, removed a significant amount of herbicide. This indicates that at sites with surface litter, timely precipitation could be critical for herbicide efficacy; however, when burning was used to remove litter and was followed by herbicides with residual soil activity, downy brome control was extended. Due to downy brome's relatively short seed viability in the soil, extending herbicide efficacy to several years could help to reduce the soil seed bank.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierKessler_colostate_0053N_12741.pdf
dc.identifier.urihttp://hdl.handle.net/10217/88563
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectimazapic
dc.subjecttebuthiuron
dc.subjectsoil seed bank
dc.subjectcheatgrass
dc.subjectrestoration
dc.subject.lcshBromus tectorum
dc.titleLitter reduction by prescribed burning can extend downy brome control
dc.typeText
dcterms.embargo.expires2016-01-31
dcterms.embargo.terms2016-01-31
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineBioagricultural Sciences and Pest Management
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Kessler_colostate_0053N_12741.pdf
Size:
994.1 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

2000-2019
Theses and Dissertations