{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/29445"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/29445","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Interactions of post emergence herbicides, strobilurin fungicides and Rhizoctonia root rot of soybean","abstract":"Rhizoctonia root rot, caused by Rhizoctonia solani, is a major disease of soybeans in the north-central United States. The emergence of glyphosate resistant weeds and the payment premium for growing non-GMO soybeans has increased the use of non-glyphosate herbicides. However, some of these herbicides may increase the severity of root rot caused by Rhizoctonia solani Field and greenhouse studies were conducted to evaluate the potential interaction among glyphosate-tolerant soybeans, post emergence herbicides (glyphosate, acifluorfen, lactofen, imazethapyr), and fungicide seed treatments (azoxystrobin, pyraclostrobin, trifloxystrobin). Inoculum of R. solani (AG 2-2) was planted along with treated seed. Herbicides were applied at recommended field rates at the V4 growth stage. Plant stand was rated after seedling emergence, and soybean roots samples were collected two weeks after herbicide application. Based on the data of field study from two locations (Champaign, IL and Monmouth, IL) and the data from greenhouse trials, plant stand was found to be significantly increased in the fungicide treated plots compare to non-treated plots, and analysis of variance revealed a significant treatment effect on root rot severity. Lactofen treated plants showed the highest disease severity levels and reduced yields. The azoxystrobin seed treatment provided the best protection against Rhizoctonia root rot. There was no significant difference of root rot severity between glyphosate treated and non-treated plants.","abstract_html":"Rhizoctonia root rot, caused by Rhizoctonia solani, is a major disease of soybeans in the north-central United States. The emergence of glyphosate resistant weeds and the payment premium for growing non-GMO soybeans has increased the use of non-glyphosate herbicides. However, some of these herbicides may increase the severity of root rot caused by Rhizoctonia solani Field and greenhouse studies were conducted to evaluate the potential interaction among glyphosate-tolerant soybeans, post emergence herbicides (glyphosate, acifluorfen, lactofen, imazethapyr), and fungicide seed treatments (azoxystrobin, pyraclostrobin, trifloxystrobin). Inoculum of R. solani (AG 2-2) was planted along with treated seed. Herbicides were applied at recommended field rates at the V4 growth stage. Plant stand was rated after seedling emergence, and soybean roots samples were collected two weeks after herbicide application. Based on the data of field study from two locations (Champaign, IL and Monmouth, IL) and the data from greenhouse trials, plant stand was found to be significantly increased in the fungicide treated plots compare to non-treated plots, and analysis of variance revealed a significant treatment effect on root rot severity. Lactofen treated plants showed the highest disease severity levels and reduced yields. The azoxystrobin seed treatment provided the best protection against Rhizoctonia root rot. There was no significant difference of root rot severity between glyphosate treated and non-treated plants.","abstract_has_math":false,"creators":["Zhang, Ren"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Crop Sciences","degree_department":null,"school":null,"contributors":["Eastburn, Darin M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-02-01T00:46:43Z","date_published":"2012-02-01T00:46:43Z","updated_at":"2026-07-22T22:25:27Z","subjects":["Rhizoctonia Root Rot","Herbicide","Fungicide","Glyphosate"],"languages":["en"],"rights":["Copyright 2011 Ren Zhang"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/29445","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Eastburn, Darin M."]},{"key":"dc:creator","label":"Author","values":["Zhang, Ren"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-02-01T00:46:43Z","2014-02-01T11:00:27Z","2011-12"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Crop Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["Rhizoctonia Root Rot","Herbicide","Fungicide","Glyphosate"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2011 Ren Zhang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/29445"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Rhizoctonia root rot, caused by Rhizoctonia solani, is a major disease of soybeans in the north-central United States. The emergence of glyphosate resistant weeds and the payment premium for growing non-GMO soybeans has increased the use of non-glyphosate herbicides. However, some of these herbicides may increase the severity of root rot caused by Rhizoctonia solani Field and greenhouse studies were conducted to evaluate the potential interaction among glyphosate-tolerant soybeans, post emergence herbicides (glyphosate, acifluorfen, lactofen, imazethapyr), and fungicide seed treatments (azoxystrobin, pyraclostrobin, trifloxystrobin). Inoculum of R. solani (AG 2-2) was planted along with treated seed. Herbicides were applied at recommended field rates at the V4 growth stage. Plant stand was rated after seedling emergence, and soybean roots samples were collected two weeks after herbicide application. Based on the data of field study from two locations (Champaign, IL and Monmouth, IL) and the data from greenhouse trials, plant stand was found to be significantly increased in the fungicide treated plots compare to non-treated plots, and analysis of variance revealed a significant treatment effect on root rot severity. Lactofen treated plants showed the highest disease severity levels and reduced yields. The azoxystrobin seed treatment provided the best protection against Rhizoctonia root rot. There was no significant difference of root rot severity between glyphosate treated and non-treated plants.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-09-27T16:10:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 ZHANG_REN.docx: 160631 bytes, checksum: 642dfc286162b6d2268859c599797a87 (MD5) ZHANG_REN.pdf: 348449 bytes, checksum: 8a1b66ec926cb748c5988746b9237c19 (MD5)","Made available in DSpace on 2012-02-01T00:46:43Z (GMT). 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The emergence of glyphosate resistant weeds and the payment premium for growing non-GMO soybeans has increased the use of non-glyphosate herbicides. However, some of these herbicides may increase the severity of root rot caused by Rhizoctonia solani Field and greenhouse studies were conducted to evaluate the potential interaction among glyphosate-tolerant soybeans, post emergence herbicides (glyphosate, acifluorfen, lactofen, imazethapyr), and fungicide seed treatments (azoxystrobin, pyraclostrobin, trifloxystrobin). Inoculum of R. solani (AG 2-2) was planted along with treated seed. Herbicides were applied at recommended field rates at the V4 growth stage. Plant stand was rated after seedling emergence, and soybean roots samples were collected two weeks after herbicide application. Based on the data of field study from two locations (Champaign, IL and Monmouth, IL) and the data from greenhouse trials, plant stand was found to be significantly increased in the fungicide treated plots compare to non-treated plots, and analysis of variance revealed a significant treatment effect on root rot severity. Lactofen treated plants showed the highest disease severity levels and reduced yields. The azoxystrobin seed treatment provided the best protection against Rhizoctonia root rot. There was no significant difference of root rot severity between glyphosate treated and non-treated plants.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-09-27T16:10:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 ZHANG_REN.docx: 160631 bytes, checksum: 642dfc286162b6d2268859c599797a87 (MD5) ZHANG_REN.pdf: 348449 bytes, checksum: 8a1b66ec926cb748c5988746b9237c19 (MD5)","Made available in DSpace on 2012-02-01T00:46:43Z (GMT). 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