{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/22907"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/22907","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Dissipation and potential crop injury for soil applied clomazone, chlorimuron, imazaquin, and imazethapyr","abstract":"Cultural practices such as tillage and method of application can influence herbicide persistence, dissipation processes, and subsequent crop injury. In field studies, the influence of tillage system and herbicide application method on dissipation rate and potential for injury to corn (Zea mays) was investigated. Herbicides evaluated included clomazone (2-((2-chlorophenyl)methyl) -4,4-dimethyl-3-isoxazolidinone), imazaquin (2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -3-quinolinecarboxylic acid), imazethapyr (($\\pm$)-2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-$ 5$-oxo-1H-imidazol-2-yl) -5-ethyl-3-pyridinecarboxylic acid), and chlorimuron (2-(((((4-chloro-6-methoxy-$ 2$-pyrimidinyl)amino) carbonyl) amino) sulfonyl) benzoic acid). Dissipation rates were monitored using chromatography and bioassay. Laboratory studies were conducted to investigate the contribution of photolysis in the dissipation of imazaquin and imazethapyr on two soil types.","abstract_html":"Cultural practices such as tillage and method of application can influence herbicide persistence, dissipation processes, and subsequent crop injury. In field studies, the influence of tillage system and herbicide application method on dissipation rate and potential for injury to corn (Zea mays) was investigated. Herbicides evaluated included clomazone (2-((2-chlorophenyl)methyl) -4,4-dimethyl-3-isoxazolidinone), imazaquin (2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -3-quinolinecarboxylic acid), imazethapyr (($\\pm$)-2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-$ 5$-oxo-1H-imidazol-2-yl) -5-ethyl-3-pyridinecarboxylic acid), and chlorimuron (2-(((((4-chloro-6-methoxy-$ 2$-pyrimidinyl)amino) carbonyl) amino) sulfonyl) benzoic acid). Dissipation rates were monitored using chromatography and bioassay. Laboratory studies were conducted to investigate the contribution of photolysis in the dissipation of imazaquin and imazethapyr on two soil types.","abstract_has_math":true,"creators":["Curran, W.S."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Agronomy","degree_department":null,"school":null,"contributors":["Liebl, Rex A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:55:27Z","date_published":"2011-05-07T13:55:27Z","updated_at":"2026-07-22T22:25:20Z","subjects":["Agriculture, Agronomy","Chemistry, Agricultural"],"languages":["eng"],"rights":["Copyright 1990 Curran, William Stevenson"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114216","(UMI)AAI9114216"],"render_values":[{"text":"AAI9114216","href":null,"code":true},{"text":"(UMI)AAI9114216","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/22907","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Liebl, Rex A."]},{"key":"dc:creator","label":"Author","values":["Curran, W.S."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:55:27Z","10000-01-01","1990"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agronomy"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Agriculture, Agronomy","Chemistry, Agricultural"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1990 Curran, William Stevenson"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9114216","(UMI)AAI9114216","http://hdl.handle.net/2142/22907"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Cultural practices such as tillage and method of application can influence herbicide persistence, dissipation processes, and subsequent crop injury. In field studies, the influence of tillage system and herbicide application method on dissipation rate and potential for injury to corn (Zea mays) was investigated. Herbicides evaluated included clomazone (2-((2-chlorophenyl)methyl) -4,4-dimethyl-3-isoxazolidinone), imazaquin (2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -3-quinolinecarboxylic acid), imazethapyr (($\\pm$)-2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-$ 5$-oxo-1H-imidazol-2-yl) -5-ethyl-3-pyridinecarboxylic acid), and chlorimuron (2-(((((4-chloro-6-methoxy-$ 2$-pyrimidinyl)amino) carbonyl) amino) sulfonyl) benzoic acid). Dissipation rates were monitored using chromatography and bioassay. Laboratory studies were conducted to investigate the contribution of photolysis in the dissipation of imazaquin and imazethapyr on two soil types.","In field experiments, corn displayed some injury at the 3-leaf stage from clomazone, chlorimuron, imazaquin, and imazethapyr carryover, but the only significant influence on grain yield was with chlorimuron on high pH soil. Residues of these herbicides from accurate and uniform preemergence applications to soybeans are not likely to persist and injure corn. Under condition favorable for corn growth, low to moderate levels of corn injury, visible at early vegetative development, may not influence grain yield.","In the tillage and herbicide application study, climatic conditions following application influenced the rate of dissipation. Incorporated applications of clomazone, imazaquin, and imazethapyr persisted longer than preemergence treatments in a low rainfall year. Laboratory assays indicated that tillage prior to herbicide application and four months following application did not influence dissipation rate. However, because of possible herbicide redistribution, subsequent crop injury was greater with imazaquin and imazethapyr and less with clomazone in reduced tillage plots than in conventional tillage treatments.","In the photolysis study, imazaquin and imazethapyr degradation were greatest on moist sand, while photolysis on dry sand and on a silty clay loam soil was minimal. Imazaquin dissipation was rapid on moist sand, with 43% loss in 24 hours. The more rapid photolysis of imazaquin and imazethapyr on coarse textured wet soil was likely due to lower soil adsorptivity and greater availability for photochemical alteration.","Made available in DSpace on 2011-05-07T13:55:27Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114216.pdf: 4168309 bytes, checksum: 6032eba9c79c8a5086f8700810dacb17 (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:00:50Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:28:49-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","Restricted to the U of I community indefinitely during batch ingest of legacy ETDs","U of I Only"]},{"key":"dc:title","label":"Title","values":["Dissipation and potential crop injury for soil applied clomazone, chlorimuron, imazaquin, and imazethapyr"]}]}],"canonical_facts":{"dc:contributor":["Liebl, Rex A."],"dc:creator":["Curran, W.S."],"dc:date":["2011-05-07T13:55:27Z","10000-01-01","1990"],"dc:description":["Cultural practices such as tillage and method of application can influence herbicide persistence, dissipation processes, and subsequent crop injury. In field studies, the influence of tillage system and herbicide application method on dissipation rate and potential for injury to corn (Zea mays) was investigated. Herbicides evaluated included clomazone (2-((2-chlorophenyl)methyl) -4,4-dimethyl-3-isoxazolidinone), imazaquin (2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl) -3-quinolinecarboxylic acid), imazethapyr (($\\pm$)-2-(4,5-dihydro-4-methyl-4-(1-methylethyl)-$ 5$-oxo-1H-imidazol-2-yl) -5-ethyl-3-pyridinecarboxylic acid), and chlorimuron (2-(((((4-chloro-6-methoxy-$ 2$-pyrimidinyl)amino) carbonyl) amino) sulfonyl) benzoic acid). Dissipation rates were monitored using chromatography and bioassay. Laboratory studies were conducted to investigate the contribution of photolysis in the dissipation of imazaquin and imazethapyr on two soil types.","In field experiments, corn displayed some injury at the 3-leaf stage from clomazone, chlorimuron, imazaquin, and imazethapyr carryover, but the only significant influence on grain yield was with chlorimuron on high pH soil. Residues of these herbicides from accurate and uniform preemergence applications to soybeans are not likely to persist and injure corn. Under condition favorable for corn growth, low to moderate levels of corn injury, visible at early vegetative development, may not influence grain yield.","In the tillage and herbicide application study, climatic conditions following application influenced the rate of dissipation. Incorporated applications of clomazone, imazaquin, and imazethapyr persisted longer than preemergence treatments in a low rainfall year. Laboratory assays indicated that tillage prior to herbicide application and four months following application did not influence dissipation rate. However, because of possible herbicide redistribution, subsequent crop injury was greater with imazaquin and imazethapyr and less with clomazone in reduced tillage plots than in conventional tillage treatments.","In the photolysis study, imazaquin and imazethapyr degradation were greatest on moist sand, while photolysis on dry sand and on a silty clay loam soil was minimal. Imazaquin dissipation was rapid on moist sand, with 43% loss in 24 hours. The more rapid photolysis of imazaquin and imazethapyr on coarse textured wet soil was likely due to lower soil adsorptivity and greater availability for photochemical alteration.","Made available in DSpace on 2011-05-07T13:55:27Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9114216.pdf: 4168309 bytes, checksum: 6032eba9c79c8a5086f8700810dacb17 (MD5) Previous issue date: 1990","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:00:50Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:28:49-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","Restricted to the U of I community indefinitely during batch ingest of legacy ETDs","U of I Only"],"dc:identifier":["AAI9114216","(UMI)AAI9114216","http://hdl.handle.net/2142/22907"],"dc:language":["eng"],"dc:rights":["Copyright 1990 Curran, William Stevenson"],"dc:subject":["Agriculture, Agronomy","Chemistry, Agricultural"],"dc:title":["Dissipation and potential crop injury for soil applied clomazone, chlorimuron, imazaquin, and imazethapyr"],"dc:type":["text"],"thesis:degree_discipline":["Agronomy"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:20Z"}