Date of Award

2014

Publisher

North Dakota State University

Document Type

Thesis

Degree Awarded

Master of Science (MS)

Program

Plant Sciences

Department

Plant Sciences

College

Agriculture, Food Systems and Natural Resources

Faculty Advisor

Lym, Rodney G.

Description

Quinclorac and aminocyclopyrachlor leaching potential was evaluated in replicated field conditions in soil from five ecological sites of the Sheyenne National Grassland (SNG). Herbicide concentration was estimated using bioassays. Quinclorac did not leach past approximately 45 cm following 51 cm of precipitation applied over 9 wk and 15 cm of precipitation applied over 48 h. Aminocyclopyrachlor leaching was greater than quinclorac and moved through all soil types following both precipitation events. Quinclorac is suitable for use at the SNG to control leafy spurge; however, aminocyclopyrachlor will not be recommended. Control of yellow toadflax with aminocyclopyrachlor was evaluated at four growth stages. Control averaged 98% 1 YAT when aminocyclopyrachlor was applied before flowering but only 50% when the herbicide was applied to the fall vegetative stage. Yellow toadflax control with picloram plus dicamba plus diflufenzopyr averaged 92% 1 YAT and was not affected by growth stage.

Rights

NDSU policy 190.6.2

Rights Link

https://www.ndsu.edu/fileadmin/policy/190.pdf

Handle Identifier

https://hdl.handle.net/10365/27254

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