Soil Persistence and Sorption Characteristics of Imazaquin, Imazethapyr, and Clomazone

The soybean herbicides imazaquin (2- (4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -3-quinolinecarboxylic acid), imazethapyr (2- (4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -5-ethyl-3-pyridinecarboxylic acid), and clomazone (2-(2-chlorophenyl)methyl-4,4-dimethyl-3-isoxazolidinone) persist in some soils for periods of time sufficient to injure crops grown in rotation with soybeans (Glycine max L.). The relationship between soil type and sorption of these herbicides to soil colloids, one determinant of persistence, has not been documented. Field studies were conducted to characterize herbicide persistence and bioavailability in two soils differing greatly in sorption capacity. Laboratory studies were conducted to determine the influence of specific soil properties on herbicide sorption.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agronomy

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Loux, Mark Monroe

Contributors dc:contributor

• Slife, Fred W.

• Agriculture, Agronomy

Identifier

(UMI)AAI8815381

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/71649