{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70581"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70581","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Effects of Glomus Etunicatus and Soil Phosphorus on Phytophthora Root Rot of Soybean","abstract":"Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.","abstract_html":"Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.","abstract_has_math":false,"creators":["Whatley, Thomas Lamar"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Plant Pathology","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T23:52:11Z","date_published":"2014-12-15T23:52:11Z","updated_at":"2026-07-22T22:26:03Z","subjects":["Agriculture, Plant Pathology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8209643"],"render_values":[{"text":"(UMI)AAI8209643","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70581","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Whatley, Thomas Lamar"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T23:52:11Z","10000-01-01","1982"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Plant Pathology"]},{"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, Plant Pathology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/70581","(UMI)AAI8209643"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.","Microplot and large plot studies indicated the cultivars 'Harosoy' and 'Williams' inoculated with Glomus etunicatus (GE) were susceptible to Phytophthora root rot caused by Phytophthora megasperma var. sojae (PMS); however, at soil phosphorus (P) levels equal to a Bray P1 of 19 or 75 kg/ha plant heights and yields were greater and significantly greater for final height and yield with a soil P1 of 75 kg/ha with application of both GE and PMS rather than PMS alone. Tolerance of PMS due to GE at Bray P1 levels of 75 kg/ha or less may be caused by improved P nutrition but no tolerance existed at higher P levels.","Root dry weight of soybeans grown in 150 cc tubes increased to an optimum level of P and decreased with additional P, exclusive of PMS. In a large plot experiment leaflet P increased with increasing soil P; however, without PMS dry matter and yield increased to the 444 kg/ha level of added P and decreased insignificantly at the 888 kg/ha P level. However, at 0, 444, 888 kg/ha added P Phytophthora root rot reduced dry matter 10, 54 and 51%, stand 19, 53 and 51%, yield 13, 39 and 39%, respectively. In plots with reduced plant populations due to high P and PMS the remaining stressed plants were unable to compensate for the yield of the missing plants.","In greenhouse susceptibility studies resistance to PMS race 1 contained in 'Harosoy 63' was not sufficient to prevent root dry weight losses due to PMS race 1 at high P levels. Reductions in root dry weight caused by PMS and high P were additive. When both root halves of a split root experiment were infested with PMS the low P side had a significantly greater root weight than the high P side. Under disease stress low P may permit greater root growth than high P. In the field losses associated with PMS may not be aleviated by resistant cultivars.","Made available in DSpace on 2014-12-15T23:52:11Z (GMT). No. of bitstreams: 1 8209643.pdf: 1833879 bytes, checksum: 92d57c60d17fe25258914011c2c46c0c (MD5) Previous issue date: 1982","Embargo set by: Seth Robbins for item 70747 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","60 p."]},{"key":"dc:title","label":"Title","values":["The Effects of Glomus Etunicatus and Soil Phosphorus on Phytophthora Root Rot of Soybean"]}]}],"canonical_facts":{"dc:creator":["Whatley, Thomas Lamar"],"dc:date":["2014-12-15T23:52:11Z","10000-01-01","1982"],"dc:description":["Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.","Microplot and large plot studies indicated the cultivars 'Harosoy' and 'Williams' inoculated with Glomus etunicatus (GE) were susceptible to Phytophthora root rot caused by Phytophthora megasperma var. sojae (PMS); however, at soil phosphorus (P) levels equal to a Bray P1 of 19 or 75 kg/ha plant heights and yields were greater and significantly greater for final height and yield with a soil P1 of 75 kg/ha with application of both GE and PMS rather than PMS alone. Tolerance of PMS due to GE at Bray P1 levels of 75 kg/ha or less may be caused by improved P nutrition but no tolerance existed at higher P levels.","Root dry weight of soybeans grown in 150 cc tubes increased to an optimum level of P and decreased with additional P, exclusive of PMS. In a large plot experiment leaflet P increased with increasing soil P; however, without PMS dry matter and yield increased to the 444 kg/ha level of added P and decreased insignificantly at the 888 kg/ha P level. However, at 0, 444, 888 kg/ha added P Phytophthora root rot reduced dry matter 10, 54 and 51%, stand 19, 53 and 51%, yield 13, 39 and 39%, respectively. In plots with reduced plant populations due to high P and PMS the remaining stressed plants were unable to compensate for the yield of the missing plants.","In greenhouse susceptibility studies resistance to PMS race 1 contained in 'Harosoy 63' was not sufficient to prevent root dry weight losses due to PMS race 1 at high P levels. Reductions in root dry weight caused by PMS and high P were additive. When both root halves of a split root experiment were infested with PMS the low P side had a significantly greater root weight than the high P side. Under disease stress low P may permit greater root growth than high P. In the field losses associated with PMS may not be aleviated by resistant cultivars.","Made available in DSpace on 2014-12-15T23:52:11Z (GMT). No. of bitstreams: 1 8209643.pdf: 1833879 bytes, checksum: 92d57c60d17fe25258914011c2c46c0c (MD5) Previous issue date: 1982","Embargo set by: Seth Robbins for item 70747 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","60 p."],"dc:identifier":["http://hdl.handle.net/2142/70581","(UMI)AAI8209643"],"dc:subject":["Agriculture, Plant Pathology"],"dc:title":["The Effects of Glomus Etunicatus and Soil Phosphorus on Phytophthora Root Rot of Soybean"],"dc:type":["text"],"thesis:degree_discipline":["Plant Pathology"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:03Z"}