{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/132592"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/132592","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Laboratory and field evaluation of efficacy of potential fungicides for managing phytophthora blight (Phytophthora capsici) of processing pumpkin (Cucurbita moschata)","abstract":"Phytophthora blight, caused by the oomycete Phytophthora capsici Leonian, is a destructive disease that severely limits the production of processing pumpkin (Cucurbita moschata Duchesne). This study was conducted to evaluate the efficacy of the potential eight fungicides or their combinations (cyazofamid, dimethomorph, dimethomorph + ametoctradin, ethaboxam, fluopicolide, mandipropamid, mandipropamid + oxathiapiprolin, and potassium phosphite) for managing P. capsici in the laboratory and fields. The effectiveness of the fungicides on mycelial growth of six Illinois isolates of P. capsici in the laboratory was determined. The field efficacy of the fungicides in fourteen different treatment combinations was evaluated in commercial processing pumpkin fields with high natural inoculum of P. capsici in Tazewell County, Illinois, during 2024 and 2025. The laboratory assays revealed that mandipropamid + oxathiapiprolin (Orondis Ultra) fungicide was the most effective in suppressing mycelial growth of P. capsici isolates [0.0036 µg/ml for 50% reduction in mycelial growth (EC50)]. In field trials, all fungicide treatments significantly (P = 0.05) reduced vine and fruit infection. Incidence of vine infection in control plots was 38.33 and 86.25% in 2024 and 2025, respectively; whereas vine infection in fungicide treated plots ranged from 1.67 to 20.00% and 1.25 to 35.00% in 2024 and 2025, respectively. Fruit infection with P. capsici in untreated plots was 45.40 and 76.10% in 2024 and 2025, respectively. The incidence of fruit infection in the fungicide treated plots ranged from 3.49 to 32.15% in 2024, and from 0.83 to 41.40% in 2025. Spray applications of mandipropamid + oxathiapiprolin (Orondis Ultra) alternated with cyazofamid (Ranman 400SC) alternated with mandipropamid (Revus 2.09SC) resulted in low vine and fruit infection. The findings of this field research emphasized using fungicides with different modes of action for effective protection of processing pumpkins against P. capsici.","abstract_html":"Phytophthora blight, caused by the oomycete Phytophthora capsici Leonian, is a destructive disease that severely limits the production of processing pumpkin (Cucurbita moschata Duchesne). This study was conducted to evaluate the efficacy of the potential eight fungicides or their combinations (cyazofamid, dimethomorph, dimethomorph + ametoctradin, ethaboxam, fluopicolide, mandipropamid, mandipropamid + oxathiapiprolin, and potassium phosphite) for managing P. capsici in the laboratory and fields. The effectiveness of the fungicides on mycelial growth of six Illinois isolates of P. capsici in the laboratory was determined. The field efficacy of the fungicides in fourteen different treatment combinations was evaluated in commercial processing pumpkin fields with high natural inoculum of P. capsici in Tazewell County, Illinois, during 2024 and 2025. The laboratory assays revealed that mandipropamid + oxathiapiprolin (Orondis Ultra) fungicide was the most effective in suppressing mycelial growth of P. capsici isolates [0.0036 µg/ml for 50% reduction in mycelial growth (EC50)]. In field trials, all fungicide treatments significantly (P = 0.05) reduced vine and fruit infection. Incidence of vine infection in control plots was 38.33 and 86.25% in 2024 and 2025, respectively; whereas vine infection in fungicide treated plots ranged from 1.67 to 20.00% and 1.25 to 35.00% in 2024 and 2025, respectively. Fruit infection with P. capsici in untreated plots was 45.40 and 76.10% in 2024 and 2025, respectively. The incidence of fruit infection in the fungicide treated plots ranged from 3.49 to 32.15% in 2024, and from 0.83 to 41.40% in 2025. Spray applications of mandipropamid + oxathiapiprolin (Orondis Ultra) alternated with cyazofamid (Ranman 400SC) alternated with mandipropamid (Revus 2.09SC) resulted in low vine and fruit infection. The findings of this field research emphasized using fungicides with different modes of action for effective protection of processing pumpkins against P. capsici.","abstract_has_math":false,"creators":["Sahil, -"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Crop Sciences","degree_department":null,"school":null,"contributors":["Babadoost, Mohammad"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-12","date_published":"2025-12","updated_at":"2026-07-22T22:25:07Z","subjects":["Oomycetes","Phytophthora capsici","Cucurbits"],"languages":["en"],"rights":["Copyright 2025 - Sahil"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/132592","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Babadoost, Mohammad"]},{"key":"dc:creator","label":"Author","values":["Sahil, -"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-12","2025-12-09"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"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 Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Oomycetes","Phytophthora capsici","Cucurbits"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 - Sahil"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/132592"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Phytophthora blight, caused by the oomycete Phytophthora capsici Leonian, is a destructive disease that severely limits the production of processing pumpkin (Cucurbita moschata Duchesne). This study was conducted to evaluate the efficacy of the potential eight fungicides or their combinations (cyazofamid, dimethomorph, dimethomorph + ametoctradin, ethaboxam, fluopicolide, mandipropamid, mandipropamid + oxathiapiprolin, and potassium phosphite) for managing P. capsici in the laboratory and fields. The effectiveness of the fungicides on mycelial growth of six Illinois isolates of P. capsici in the laboratory was determined. The field efficacy of the fungicides in fourteen different treatment combinations was evaluated in commercial processing pumpkin fields with high natural inoculum of P. capsici in Tazewell County, Illinois, during 2024 and 2025. The laboratory assays revealed that mandipropamid + oxathiapiprolin (Orondis Ultra) fungicide was the most effective in suppressing mycelial growth of P. capsici isolates [0.0036 µg/ml for 50% reduction in mycelial growth (EC50)]. In field trials, all fungicide treatments significantly (P = 0.05) reduced vine and fruit infection. Incidence of vine infection in control plots was 38.33 and 86.25% in 2024 and 2025, respectively; whereas vine infection in fungicide treated plots ranged from 1.67 to 20.00% and 1.25 to 35.00% in 2024 and 2025, respectively. Fruit infection with P. capsici in untreated plots was 45.40 and 76.10% in 2024 and 2025, respectively. The incidence of fruit infection in the fungicide treated plots ranged from 3.49 to 32.15% in 2024, and from 0.83 to 41.40% in 2025. Spray applications of mandipropamid + oxathiapiprolin (Orondis Ultra) alternated with cyazofamid (Ranman 400SC) alternated with mandipropamid (Revus 2.09SC) resulted in low vine and fruit infection. The findings of this field research emphasized using fungicides with different modes of action for effective protection of processing pumpkins against P. capsici.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2026-02-19 without embargo terms","The student, - Sahil, accepted the attached license on 2025-12-08 at 13:39.","The student, - Sahil, submitted this Thesis for approval on 2025-12-08 at 13:50.","This Thesis was approved for publication on 2025-12-09 at 13:47.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23103 on 2026-02-19 at 18:30:08"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Laboratory and field evaluation of efficacy of potential fungicides for managing phytophthora blight (Phytophthora capsici) of processing pumpkin (Cucurbita moschata)"]}]}],"canonical_facts":{"dc:contributor":["Babadoost, Mohammad"],"dc:creator":["Sahil, -"],"dc:date":["2025-12","2025-12-09"],"dc:description":["Phytophthora blight, caused by the oomycete Phytophthora capsici Leonian, is a destructive disease that severely limits the production of processing pumpkin (Cucurbita moschata Duchesne). This study was conducted to evaluate the efficacy of the potential eight fungicides or their combinations (cyazofamid, dimethomorph, dimethomorph + ametoctradin, ethaboxam, fluopicolide, mandipropamid, mandipropamid + oxathiapiprolin, and potassium phosphite) for managing P. capsici in the laboratory and fields. The effectiveness of the fungicides on mycelial growth of six Illinois isolates of P. capsici in the laboratory was determined. The field efficacy of the fungicides in fourteen different treatment combinations was evaluated in commercial processing pumpkin fields with high natural inoculum of P. capsici in Tazewell County, Illinois, during 2024 and 2025. The laboratory assays revealed that mandipropamid + oxathiapiprolin (Orondis Ultra) fungicide was the most effective in suppressing mycelial growth of P. capsici isolates [0.0036 µg/ml for 50% reduction in mycelial growth (EC50)]. In field trials, all fungicide treatments significantly (P = 0.05) reduced vine and fruit infection. Incidence of vine infection in control plots was 38.33 and 86.25% in 2024 and 2025, respectively; whereas vine infection in fungicide treated plots ranged from 1.67 to 20.00% and 1.25 to 35.00% in 2024 and 2025, respectively. Fruit infection with P. capsici in untreated plots was 45.40 and 76.10% in 2024 and 2025, respectively. The incidence of fruit infection in the fungicide treated plots ranged from 3.49 to 32.15% in 2024, and from 0.83 to 41.40% in 2025. Spray applications of mandipropamid + oxathiapiprolin (Orondis Ultra) alternated with cyazofamid (Ranman 400SC) alternated with mandipropamid (Revus 2.09SC) resulted in low vine and fruit infection. The findings of this field research emphasized using fungicides with different modes of action for effective protection of processing pumpkins against P. capsici.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2026-02-19 without embargo terms","The student, - Sahil, accepted the attached license on 2025-12-08 at 13:39.","The student, - Sahil, submitted this Thesis for approval on 2025-12-08 at 13:50.","This Thesis was approved for publication on 2025-12-09 at 13:47.","DSpace SAF Submission Ingestion Package generated from Vireo submission #23103 on 2026-02-19 at 18:30:08"],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/132592"],"dc:language":["en"],"dc:rights":["Copyright 2025 - Sahil"],"dc:subject":["Oomycetes","Phytophthora capsici","Cucurbits"],"dc:title":["Laboratory and field evaluation of efficacy of potential fungicides for managing phytophthora blight (Phytophthora capsici) of processing pumpkin (Cucurbita moschata)"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Crop Sciences"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:07Z"}