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Regulatory limits on methyl bromide, plus limited resistant russet varieties for US markets, motivated evaluation of alternative control tactics. Brassica juncea seed meal extract (SME) was tested in greenhouse and field trials alone or with the trap crop Solanum sisymbriifolium across multiple application rates. Results showed strong reductions in encysted egg numbers, viability, hatch, and reproduction, with combined treatments enabling lower SME requirements and further depletion of the viable egg population.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/globodera-pallida-control-using-brassica-juncea-seed-meal-extract-and-the-trap-crop-solanum-sisymbriifolium-a-thesis/691376/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/globodera-pallida-control-using-brassica-juncea-seed-meal-extract-and-the-trap-crop-solanum-sisymbriifolium-a-thesis/691376.png","ImageObject",300,407,{"name":92,"@type":93},"Miles","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-08",true,{"@type":101,"interactionType":102,"userInteractionCount":4},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"Why was alternative control needed for Globodera pallida?","Question",{"text":111,"@type":112},"Methyl bromide use is restricted and there are limited resistant russet-type potato varieties for US markets. This led to investigations of alternative control strategies.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"How were Brassica juncea seed meal extract (SME) and the trap crop Solanum sisymbriifolium evaluated?",{"text":116,"@type":112},"SME was tested at multiple rates under greenhouse and field conditions, either alone or combined with S. sisymbriifolium. Applications were timed pre-planting or post-planting to assess their effects.",{"name":118,"@type":109,"acceptedAnswer":119},"What did the study find about the effectiveness of the trap crop alone?",{"text":120,"@type":112},"Solanum sisymbriifolium alone reduced the number of encysted eggs compared with the untreated control, up to about 60% in greenhouse and about 67% in field trials.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},691376,1794174176,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":128,"read_time":143,"preview_page_count":4},13056703019404,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Globodera pallida Control Using Brassica juncea Seed Meal Extract and the Trap Crop Solanum sisymbriifolium  \nA Thesis  \nPresented in Partial Fulfillment of the Requirements for the Degree of Master of Science  \nwith a  \nMajor in Plant Pathology  \nin the  \nCollege of Graduate Studies  \nUniversity of Idaho  \nby  \nBhupendra Bhatta  \nMajor Professor: Louise-Marie Dandurand, Ph.D.  \nCommittee Members: Matthew J. Morra, Ph.D. ; Edwin Lewis, Ph.D.  \nDepartment Administrator: Edwin Lewis, Ph.D.  \nAuthorization to Submit Thesis  \nThis thesis of Bhupendra Bhatta, submitted for the degree of Master of Science with a Major in Plant Pathology and titled \"Globodera pallida control using Brassica juncea seed meal extract and the trap crop Solanum sisymbriifolium,\" has been reviewed in final form. Permission, as indicated by the signatures and dates below, is now granted to submit final copies to the College of Graduate Studies for approval.  \nMajor Professor:   Date:    \nLouise-Marie Dandurand, Ph.D.  \nCommittee Members:   Date:    \nMatthew J. Morra, Ph.D.  \n  Date:    \nEdwin Lewis, Ph.D.  \nDepartment  \nAdministrator:   Date:    \nEdwin Lewis, Ph.D.  \nAbstract  \nGlobodera pallida, the pale cyst nematode, is a regulated potato pest with the potential for detrimental economic impacts. Restrictions on use of the soil fumigant, methyl bromide, and lack of resistant russet type varieties for US markets have led to investigations of alternative strategies to control this potato pest. The efficacy of Brassica juncea seed meal extract (SME) was evaluated under greenhouse conditions (0, 0.14, 0.28, 0.56, 1.12, and 2.24 t SME/ha) and field conditions (0, 1.12, and 2.24 t SME/ha in year 2019 and 0, 0.14, 0.28, 0.56, and 1.12 t SME/ha in year 2020) either applied alone or in combination with the trap crop Solanum sisymbriifolium. The impact of the application of SME pre-or post-planting S. sisymbriifolium was determined. Solanum sisymbriifolium alone reduced the number of encysted eggs compared to the untreated control by up to 60% in greenhouse and 67% in field trials. When SME was applied post-planting, S. sisymbriifolium induced hatch of G. pallida and significantly fewer encysted eggs remained at termination of the experiment whether or not SME was applied. When SME was applied pre-plant, the remaining encysted eggs were not decreased by planting S. sisymbriifolium which may indicate that SME inhibited egg hatch in the presence ofS. sisymbriifolium. Treatments with SME either alone or with S. sisymbriifolium provided a significant reduction of G. pallida egg viability, hatch, and reproduction compared to the untreated control at all rates tested under greenhouse conditions. Combined treatment with S. sisymbriifolium and SME at lower rates, 0.14 t/ha for pre-plant or 0.56 t/ha or less for the post-plant experiment, further reduced egg hatch and reproduction than each treatment alone. SME alone applied at higher rates of 1.12 and 2.24 t/ha whether or not combined with S. sisymbriifolium eliminated G. pallida reproduction on potato in both pre-plant and one post-plant greenhouse trials. In the second post-plant greenhouse trial, SME at 1.12 t/ha and 2.24 t/ha when applied alone highly reduced the reproduction factor compared to the untreated control by 64 and 89%, respectively, and eliminated reproduction when used in combination with S. sisymbriifolium. Collectively, our results indicated that a combination of SME and S. sisymbriifolium allows an opportunity to reduce the amount of SME required to control G. pallida and further decrease the potential reserve of the viable population remaining after individual treatment with each strategy.  \nAcknowledgments  \nI would like to thank my major professor-Dr. Louise-Marie Dandurand for the invaluable advice and for steering me in the right direction during my graduate studies at the University of Idaho. I would like to acknowledge my committee members, Dr. Matthew J. Morra, and Dr. Edwin Lewis, for their inp","cbCaiesBtG1zYHiX","https://ap.wps.com/l/cbCaiesBtG1zYHiX","pdf",420733,51,"English","# Authorization to Submit Thesis\n# Abstract\n# Acknowledgments\n# Dedication\n# Table of Contents\n# List of Tables\n# Chapter 1: Introduction","[{\"question\":\"Why was alternative control needed for Globodera pallida?\",\"answer\":\"Methyl bromide use is restricted and there are limited resistant russet-type potato varieties for US markets. This led to investigations of alternative control strategies.\"},{\"question\":\"How were Brassica juncea seed meal extract (SME) and the trap crop Solanum sisymbriifolium evaluated?\",\"answer\":\"SME was tested at multiple rates under greenhouse and field conditions, either alone or combined with S. sisymbriifolium. Applications were timed pre-planting or post-planting to assess their effects.\"},{\"question\":\"What did the study find about the effectiveness of the trap crop alone?\",\"answer\":\"Solanum sisymbriifolium alone reduced the number of encysted eggs compared with the untreated control, up to about 60% in greenhouse and about 67% in field trials.\"}]","Globodera pallida Control Using Brassica juncea Seed Meal Extract and the Trap Crop Solanum sisymbriifolium - A Thesis | PDF",129]