Abstract

This thesis explores potential seeding techiniques to limit harmful effects of preemergent herbicide on a seeded species while simultaneously reducing abudance of annual invasive grasses. The first chapter examines the use of activated carbon seed coatings and furrows to limit herbicide effect on seeds of a perrenial bunchgrass. We found that both carbon coatings and furrows mitigated some of the herbicide effects, but that only when the two techniques were combined did we observe unaffected seedling emergence, plant density, and aboveground growth. Therefore, we suggest to management that use of carbon coatings and furrows after herbicide application can likely be used to reduce invasive annual grasses while simultaneously establishing a native bunchgrass. In chapter 2, we examine the effects of a novel preemergent herbicide indaziflam, on native seeds and compare it against a common preemergent herbicide, imazapic. We found that indaziflam provides superior long-term control of annual invasive grasses than imazapic, but that it is also more detrimental to native seeds. Our results suggest that indaziflam is best suited for control purposes only, and is hard to incorporate in restoration seeding efforts due to its strong effects on native seed.

Degree

MS

College and Department

Life Sciences

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2020-03-27

Document Type

Thesis

Handle

http://hdl.lib.byu.edu/1877/etd11530

Keywords

activated carbon, furrow, imazapic, invasion, restoration, cheatgrass, indaziflam

Language

english

Included in

Life Sciences Commons

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