Field and management factors can reduce potato early blight severity - An observational study on farms combined with field trials in southern Sweden

Field and management factors can reduce potato early blight severity - An observational study on farms combined with field trials in southern Sweden | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Field and management factors can reduce potato early blight severity - An observational study on farms combined with field trials in southern Sweden Linnea Johanna Stridh, Gabriella Malm, Åsa Lankinen, Erland Liljeroth This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3187902/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 04 Nov, 2023 Read the published version in Potato Research → Version 1 posted 4 You are reading this latest preprint version Abstract Background and aims The necrotrophic fungal pathogen Alternaria solani is causing early blight and thereby yield reduction in the potato production. The pathogen is today mainly controlled by fungicide applications. The severity of early blight can vary largely among farms and fields. The aim of this study was to improve the understanding of what field and management parameters that are most important for early blight infection to create more farm specific fungicide treatment recommendations. Methods Over three seasons, 2019–2021, more than 50 field plots were observed at farms in southern Sweden. In each field a 24 m x 24 m plot was left untreated against early blight. However, late blight fungicides were applied. The disease rate was scored in the untreated plot and information about various soil/plant parameters and farmer’s management was collected from each field. In addition to the observational study, field trials were performed in 2021 and 2022, evaluating the effect of potassium fertilizer levels on severeness of infection. Results We found that the soil composition was of significant importance for the rate of infection, in particular the sand, clay, and potassium content. Low levels of leaf potassium increased the severity of early blight infection and this observation was confirmed in field trials where different levels of potassium fertilizer were applied. Conclusion With knowledge about field and management factors that influence disease field specific recommendations can be developed supporting an integrated pest management strategy for early blight to reduce and optimize the fungicide usage. Alternaria solani soil potassium IPM participatory research sand content Full Text Supplementary Files CoverPhotograph.jpg Cite Share Download PDF Status: Published Journal Publication published 04 Nov, 2023 Read the published version in Potato Research → Version 1 posted Reviewers agreed at journal 24 Jul, 2023 Reviewers invited by journal 24 Jul, 2023 Editor assigned by journal 24 Jul, 2023 First submitted to journal 20 Jul, 2023 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About In Review Editorial Policies Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-3187902","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":221216591,"identity":"31db0550-f4c8-4726-bc47-366b8f01111f","order_by":0,"name":"Linnea Johanna Stridh","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA1UlEQVRIiWNgGAWjYBACPmY4k7FBmqGCQYagFjaYFh6wljNAmqAWGAOkVJqxjRgt7LzHHnyoYbC3lz7ceLtwXh2PwQH2hw/wO4wv3XDGMYbEHr7EZuuZ2w4DtfAYG+DXwmMmzcPGkMDDw9gmzbvtAEgLmwRBLX/+MdhDtMwBO+z5D4JagL5m7AFraWAGamEww6cDrEWyt08isecMY7M1z7HDPJKHeYzxOoyf/4yZxI9vNvbsPewPb/PU1MnxHW9/+AGvNRCAbCwzTlWjYBSMglEwCogFAIz5NjHF5ItfAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0001-8124-0054","institution":"Swedish University of Agricultural Sciences Alnarp Campus: Sveriges lantbruksuniversitet - 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An observational study on farms combined with field trials in southern Sweden","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"potato-research","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"potr","sideBox":"Learn more about [Potato Research](http://link.springer.com/journal/11540)","snPcode":"11540","submissionUrl":"https://www.editorialmanager.com/potr/default2.aspx","title":"Potato Research","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Alternaria solani, soil, potassium, IPM, participatory research, sand content","lastPublishedDoi":"10.21203/rs.3.rs-3187902/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3187902/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003ch2\u003eBackground and aims\u003c/h2\u003e \u003cp\u003eThe necrotrophic fungal pathogen \u003cem\u003eAlternaria solani\u003c/em\u003e is causing early blight and thereby yield reduction in the potato production. The pathogen is today mainly controlled by fungicide applications. The severity of early blight can vary largely among farms and fields. The aim of this study was to improve the understanding of what field and management parameters that are most important for early blight infection to create more farm specific fungicide treatment recommendations.\u003c/p\u003e\u003ch2\u003eMethods\u003c/h2\u003e \u003cp\u003eOver three seasons, 2019\u0026ndash;2021, more than 50 field plots were observed at farms in southern Sweden. In each field a 24 m x 24 m plot was left untreated against early blight. However, late blight fungicides were applied. The disease rate was scored in the untreated plot and information about various soil/plant parameters and farmer\u0026rsquo;s management was collected from each field. In addition to the observational study, field trials were performed in 2021 and 2022, evaluating the effect of potassium fertilizer levels on severeness of infection.\u003c/p\u003e\u003ch2\u003eResults\u003c/h2\u003e \u003cp\u003eWe found that the soil composition was of significant importance for the rate of infection, in particular the sand, clay, and potassium content. Low levels of leaf potassium increased the severity of early blight infection and this observation was confirmed in field trials where different levels of potassium fertilizer were applied.\u003c/p\u003e\u003ch2\u003eConclusion\u003c/h2\u003e \u003cp\u003eWith knowledge about field and management factors that influence disease field specific recommendations can be developed supporting an integrated pest management strategy for early blight to reduce and optimize the fungicide usage.\u003c/p\u003e","manuscriptTitle":"Field and management factors can reduce potato early blight severity - An observational study on farms combined with field trials in southern Sweden","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2023-07-27 18:56:25","doi":"10.21203/rs.3.rs-3187902/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2023-07-24T21:53:15+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2023-07-24T19:06:18+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2023-07-24T06:50:59+00:00","index":"","fulltext":""},{"type":"submitted","content":"Potato Research","date":"2023-07-20T05:51:23+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"potato-research","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"potr","sideBox":"Learn more about [Potato Research](http://link.springer.com/journal/11540)","snPcode":"11540","submissionUrl":"https://www.editorialmanager.com/potr/default2.aspx","title":"Potato Research","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"0572b5b4-8f2e-4ea1-b37a-fa7204617a69","owner":[],"postedDate":"July 27th, 2023","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2023-11-06T15:03:21+00:00","versionOfRecord":{"articleIdentity":"rs-3187902","link":"https://doi.org/10.1007/s11540-023-09669-x","journal":{"identity":"potato-research","isVorOnly":false,"title":"Potato Research"},"publishedOn":"2023-11-04 15:01:08","publishedOnDateReadable":"November 4th, 2023"},"versionCreatedAt":"2023-07-27 18:56:25","video":"","vorDoi":"10.1007/s11540-023-09669-x","vorDoiUrl":"https://doi.org/10.1007/s11540-023-09669-x","workflowStages":[]},"version":"v1","identity":"rs-3187902","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3187902","identity":"rs-3187902","version":["v1"]},"buildId":"re_ckhLnmML6MCF96OHNJ","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}