Potassium phosphite for control of downy mildew of soybean

Downy mildew of soybean, caused by Peronospora manshurica, is widely spread throughout Brazil. The objective of this study was to evaluate the use of potassium phosphite to control this disease. Field experiments were conducted during the growing season of 2006/2007 and 2007/2008 in the state of Par...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Crop protection 2011-06, Vol.30 (6), p.598-604
Hauptverfasser: Silva, O.C., Santos, H.A.A., Dalla Pria, M., May-De Mio, L.L.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 604
container_issue 6
container_start_page 598
container_title Crop protection
container_volume 30
creator Silva, O.C.
Santos, H.A.A.
Dalla Pria, M.
May-De Mio, L.L.
description Downy mildew of soybean, caused by Peronospora manshurica, is widely spread throughout Brazil. The objective of this study was to evaluate the use of potassium phosphite to control this disease. Field experiments were conducted during the growing season of 2006/2007 and 2007/2008 in the state of Parana in southern Brazil. The experimental design consisted of completely randomized blocks in a factorial arrangement (4 × 2) with four replications. Four rates of potassium phosphite (0, 375, 750 and 1500 g P 2O 5 + K 2O ha −1) were applied at two growth stages, V6 (fifth trifoliolate leaf) and R2 (full flowering), followed by one or two applications of pyraclostrobin and epoxiconazole (66.5 + 25 g a.i. ha −1) at R3 (pod development) or R2 and R5.1 (10% of pod filling), mainly for the control of Asian soybean rust ( Phakopsora pachyrhizi) and powdery mildew ( Microsphaera diffusa). Field experiments were conducted to quantify the severity of downy mildew on leaves, nutrient content in leaf tissue (N, P and K), leaf area index (LAI), yield and seed weight. The maximum severity of downy mildew was observed at a growth stage of R5.3 (50% of pods were ripe), with 14% and 46% of the leaf area affected in 2006/2007 and 2007/2008, respectively. Also it was detected some effect of phosphite on Asian rust control but it was mostly in the trial of 2007/08 when the epidemic was very low (9.7–21.8% of severity). There was a linear reduction in the severity of downy mildew and a significant improvement in the LAI with an increase in the rate of phosphite applied. During the 2006/2007 growing season, a significant yield improvement was observed due to the application of the highest rate of phosphite. Two fungicide applications following phosphite application significantly improved the control of Asian soybean rust and powdery mildew, yield and seed weight when compared to a single fungicide application. ► Phosphite show dose response on reduction of the downy mildew severity in soybean. ► Phosphite can be an alternative for the management of downy mildew in soybean. ► There is a positive correlation between foliar infection of downy mildew and presence of oospores on seeds. ► Fungicide for the control of Asian soybean rust and powdery mildew in soybean does not affect downy mildew epidemic.
doi_str_mv 10.1016/j.cropro.2011.02.015
format Article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_918041205</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0261219411000585</els_id><sourcerecordid>918041205</sourcerecordid><originalsourceid>FETCH-LOGICAL-c338t-8e09f259d6e3761080fa4f4b9b1a85492572f40bd91f6d40626dd85cb5c4255a3</originalsourceid><addsrcrecordid>eNp9kEtLxDAcxIMouD6-gYfePLX-kybZxIMgiy9Y0IOeQ5oHm6VtatJ12W9vl3r2NAzMDMwPoRsMFQbM77aVSXFIsSKAcQWkAsxO0AKLZV1yCfQULYBwXBIs6Tm6yHkLAKSuyQLdf8RR5xx2XTFsYh42YXSFj6kwsR9TbIvoCxv3_aHoQmvd_uhzPDRO91fozOs2u-s_vURfz0-fq9dy_f7ytnpcl6auxVgKB9ITJi139ZJjEOA19bSRDdaCUUnYkngKjZXYc0uBE26tYKZhhhLGdH2Jbufd6eH3zuVRdSEb17a6d3GXlcQCKCbApiSdkxOOnJPzakih0-mgMKgjKbVVMyl1JKWAqInUVHuYa2568RNcUtkE1xtnQ3JmVDaG_wd-AWSMczA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>918041205</pqid></control><display><type>article</type><title>Potassium phosphite for control of downy mildew of soybean</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Silva, O.C. ; Santos, H.A.A. ; Dalla Pria, M. ; May-De Mio, L.L.</creator><creatorcontrib>Silva, O.C. ; Santos, H.A.A. ; Dalla Pria, M. ; May-De Mio, L.L.</creatorcontrib><description>Downy mildew of soybean, caused by Peronospora manshurica, is widely spread throughout Brazil. The objective of this study was to evaluate the use of potassium phosphite to control this disease. Field experiments were conducted during the growing season of 2006/2007 and 2007/2008 in the state of Parana in southern Brazil. The experimental design consisted of completely randomized blocks in a factorial arrangement (4 × 2) with four replications. Four rates of potassium phosphite (0, 375, 750 and 1500 g P 2O 5 + K 2O ha −1) were applied at two growth stages, V6 (fifth trifoliolate leaf) and R2 (full flowering), followed by one or two applications of pyraclostrobin and epoxiconazole (66.5 + 25 g a.i. ha −1) at R3 (pod development) or R2 and R5.1 (10% of pod filling), mainly for the control of Asian soybean rust ( Phakopsora pachyrhizi) and powdery mildew ( Microsphaera diffusa). Field experiments were conducted to quantify the severity of downy mildew on leaves, nutrient content in leaf tissue (N, P and K), leaf area index (LAI), yield and seed weight. The maximum severity of downy mildew was observed at a growth stage of R5.3 (50% of pods were ripe), with 14% and 46% of the leaf area affected in 2006/2007 and 2007/2008, respectively. Also it was detected some effect of phosphite on Asian rust control but it was mostly in the trial of 2007/08 when the epidemic was very low (9.7–21.8% of severity). There was a linear reduction in the severity of downy mildew and a significant improvement in the LAI with an increase in the rate of phosphite applied. During the 2006/2007 growing season, a significant yield improvement was observed due to the application of the highest rate of phosphite. Two fungicide applications following phosphite application significantly improved the control of Asian soybean rust and powdery mildew, yield and seed weight when compared to a single fungicide application. ► Phosphite show dose response on reduction of the downy mildew severity in soybean. ► Phosphite can be an alternative for the management of downy mildew in soybean. ► There is a positive correlation between foliar infection of downy mildew and presence of oospores on seeds. ► Fungicide for the control of Asian soybean rust and powdery mildew in soybean does not affect downy mildew epidemic.</description><identifier>ISSN: 0261-2194</identifier><identifier>EISSN: 1873-6904</identifier><identifier>DOI: 10.1016/j.cropro.2011.02.015</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Crop protection ; Fungicide ; Glycine max ; Peronospora ; Phosphorus</subject><ispartof>Crop protection, 2011-06, Vol.30 (6), p.598-604</ispartof><rights>2011 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c338t-8e09f259d6e3761080fa4f4b9b1a85492572f40bd91f6d40626dd85cb5c4255a3</citedby><cites>FETCH-LOGICAL-c338t-8e09f259d6e3761080fa4f4b9b1a85492572f40bd91f6d40626dd85cb5c4255a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.cropro.2011.02.015$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Silva, O.C.</creatorcontrib><creatorcontrib>Santos, H.A.A.</creatorcontrib><creatorcontrib>Dalla Pria, M.</creatorcontrib><creatorcontrib>May-De Mio, L.L.</creatorcontrib><title>Potassium phosphite for control of downy mildew of soybean</title><title>Crop protection</title><description>Downy mildew of soybean, caused by Peronospora manshurica, is widely spread throughout Brazil. The objective of this study was to evaluate the use of potassium phosphite to control this disease. Field experiments were conducted during the growing season of 2006/2007 and 2007/2008 in the state of Parana in southern Brazil. The experimental design consisted of completely randomized blocks in a factorial arrangement (4 × 2) with four replications. Four rates of potassium phosphite (0, 375, 750 and 1500 g P 2O 5 + K 2O ha −1) were applied at two growth stages, V6 (fifth trifoliolate leaf) and R2 (full flowering), followed by one or two applications of pyraclostrobin and epoxiconazole (66.5 + 25 g a.i. ha −1) at R3 (pod development) or R2 and R5.1 (10% of pod filling), mainly for the control of Asian soybean rust ( Phakopsora pachyrhizi) and powdery mildew ( Microsphaera diffusa). Field experiments were conducted to quantify the severity of downy mildew on leaves, nutrient content in leaf tissue (N, P and K), leaf area index (LAI), yield and seed weight. The maximum severity of downy mildew was observed at a growth stage of R5.3 (50% of pods were ripe), with 14% and 46% of the leaf area affected in 2006/2007 and 2007/2008, respectively. Also it was detected some effect of phosphite on Asian rust control but it was mostly in the trial of 2007/08 when the epidemic was very low (9.7–21.8% of severity). There was a linear reduction in the severity of downy mildew and a significant improvement in the LAI with an increase in the rate of phosphite applied. During the 2006/2007 growing season, a significant yield improvement was observed due to the application of the highest rate of phosphite. Two fungicide applications following phosphite application significantly improved the control of Asian soybean rust and powdery mildew, yield and seed weight when compared to a single fungicide application. ► Phosphite show dose response on reduction of the downy mildew severity in soybean. ► Phosphite can be an alternative for the management of downy mildew in soybean. ► There is a positive correlation between foliar infection of downy mildew and presence of oospores on seeds. ► Fungicide for the control of Asian soybean rust and powdery mildew in soybean does not affect downy mildew epidemic.</description><subject>Crop protection</subject><subject>Fungicide</subject><subject>Glycine max</subject><subject>Peronospora</subject><subject>Phosphorus</subject><issn>0261-2194</issn><issn>1873-6904</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAcxIMouD6-gYfePLX-kybZxIMgiy9Y0IOeQ5oHm6VtatJ12W9vl3r2NAzMDMwPoRsMFQbM77aVSXFIsSKAcQWkAsxO0AKLZV1yCfQULYBwXBIs6Tm6yHkLAKSuyQLdf8RR5xx2XTFsYh42YXSFj6kwsR9TbIvoCxv3_aHoQmvd_uhzPDRO91fozOs2u-s_vURfz0-fq9dy_f7ytnpcl6auxVgKB9ITJi139ZJjEOA19bSRDdaCUUnYkngKjZXYc0uBE26tYKZhhhLGdH2Jbufd6eH3zuVRdSEb17a6d3GXlcQCKCbApiSdkxOOnJPzakih0-mgMKgjKbVVMyl1JKWAqInUVHuYa2568RNcUtkE1xtnQ3JmVDaG_wd-AWSMczA</recordid><startdate>20110601</startdate><enddate>20110601</enddate><creator>Silva, O.C.</creator><creator>Santos, H.A.A.</creator><creator>Dalla Pria, M.</creator><creator>May-De Mio, L.L.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>M7N</scope><scope>SOI</scope></search><sort><creationdate>20110601</creationdate><title>Potassium phosphite for control of downy mildew of soybean</title><author>Silva, O.C. ; Santos, H.A.A. ; Dalla Pria, M. ; May-De Mio, L.L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c338t-8e09f259d6e3761080fa4f4b9b1a85492572f40bd91f6d40626dd85cb5c4255a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Crop protection</topic><topic>Fungicide</topic><topic>Glycine max</topic><topic>Peronospora</topic><topic>Phosphorus</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Silva, O.C.</creatorcontrib><creatorcontrib>Santos, H.A.A.</creatorcontrib><creatorcontrib>Dalla Pria, M.</creatorcontrib><creatorcontrib>May-De Mio, L.L.</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Environment Abstracts</collection><jtitle>Crop protection</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Silva, O.C.</au><au>Santos, H.A.A.</au><au>Dalla Pria, M.</au><au>May-De Mio, L.L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Potassium phosphite for control of downy mildew of soybean</atitle><jtitle>Crop protection</jtitle><date>2011-06-01</date><risdate>2011</risdate><volume>30</volume><issue>6</issue><spage>598</spage><epage>604</epage><pages>598-604</pages><issn>0261-2194</issn><eissn>1873-6904</eissn><abstract>Downy mildew of soybean, caused by Peronospora manshurica, is widely spread throughout Brazil. The objective of this study was to evaluate the use of potassium phosphite to control this disease. Field experiments were conducted during the growing season of 2006/2007 and 2007/2008 in the state of Parana in southern Brazil. The experimental design consisted of completely randomized blocks in a factorial arrangement (4 × 2) with four replications. Four rates of potassium phosphite (0, 375, 750 and 1500 g P 2O 5 + K 2O ha −1) were applied at two growth stages, V6 (fifth trifoliolate leaf) and R2 (full flowering), followed by one or two applications of pyraclostrobin and epoxiconazole (66.5 + 25 g a.i. ha −1) at R3 (pod development) or R2 and R5.1 (10% of pod filling), mainly for the control of Asian soybean rust ( Phakopsora pachyrhizi) and powdery mildew ( Microsphaera diffusa). Field experiments were conducted to quantify the severity of downy mildew on leaves, nutrient content in leaf tissue (N, P and K), leaf area index (LAI), yield and seed weight. The maximum severity of downy mildew was observed at a growth stage of R5.3 (50% of pods were ripe), with 14% and 46% of the leaf area affected in 2006/2007 and 2007/2008, respectively. Also it was detected some effect of phosphite on Asian rust control but it was mostly in the trial of 2007/08 when the epidemic was very low (9.7–21.8% of severity). There was a linear reduction in the severity of downy mildew and a significant improvement in the LAI with an increase in the rate of phosphite applied. During the 2006/2007 growing season, a significant yield improvement was observed due to the application of the highest rate of phosphite. Two fungicide applications following phosphite application significantly improved the control of Asian soybean rust and powdery mildew, yield and seed weight when compared to a single fungicide application. ► Phosphite show dose response on reduction of the downy mildew severity in soybean. ► Phosphite can be an alternative for the management of downy mildew in soybean. ► There is a positive correlation between foliar infection of downy mildew and presence of oospores on seeds. ► Fungicide for the control of Asian soybean rust and powdery mildew in soybean does not affect downy mildew epidemic.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.cropro.2011.02.015</doi><tpages>7</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0261-2194
ispartof Crop protection, 2011-06, Vol.30 (6), p.598-604
issn 0261-2194
1873-6904
language eng
recordid cdi_proquest_miscellaneous_918041205
source ScienceDirect Journals (5 years ago - present)
subjects Crop protection
Fungicide
Glycine max
Peronospora
Phosphorus
title Potassium phosphite for control of downy mildew of soybean
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-11T04%3A13%3A05IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Potassium%20phosphite%20for%20control%20of%20downy%20mildew%20of%20soybean&rft.jtitle=Crop%20protection&rft.au=Silva,%20O.C.&rft.date=2011-06-01&rft.volume=30&rft.issue=6&rft.spage=598&rft.epage=604&rft.pages=598-604&rft.issn=0261-2194&rft.eissn=1873-6904&rft_id=info:doi/10.1016/j.cropro.2011.02.015&rft_dat=%3Cproquest_cross%3E918041205%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=918041205&rft_id=info:pmid/&rft_els_id=S0261219411000585&rfr_iscdi=true