Growing soybean varieties with resistance to the soybean cyst nematode (SCN) is an excellent way to manage this pervasive and serious soybean pest. Growers have hundreds of SCN-resistant soybean varieties from which to pick

Tylka, Gregory

Growing soybean varieties with resistance to the soybean cyst nematode (SCN) is an excellent way to manage this pervasive and serious soybean pest. Growers have hundreds of SCN-resistant soybean varieties from which to pick.</p

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5/5/2014 scn resistant soybean varietieshttp://www.extension.iastate.edu/CropNews/2011/1021tylka.htm 1/3PRINT STORYEMAIL STORYADD TO DELICIOUS ATOM FEEDFOLLOW ON TWITTER Subscribe to CropNewsArchives2014201320122011201020092008 Previous YearsISU Crop ResourcesExtension FieldAgronomistsCrop & Soils InfoPesticide ApplicatorTrainingAgronomy ExtensionEntomology ExtensionPlant PathologyExtensionAg and BiosystemsEngineering ExtensionAgribusinessEducation ProgramIowa Grain QualityInitiativeCollege of Agricultureand Life SciencesISU ExtensionKnow Your Choices: Hundreds of SCN-resistant Soybean Varieties For IowaGreg Tylka, Department of Plant Pathology and MicrobiologyGrowing soybean varieties with resistance to the soybean cyst nematode(SCN) is an excellent way to manage this pervasive and serious soybeanpest. Growers have hundreds of SCN-resistant soybean varieties from whichto pick.To help Iowa growers sort through all of the possibilities, Iowa StateUniversity Extension personnel annually compile a list of SCN-resistantsoybean varieties in late maturity group 0 and maturity groups 1, 2, and 3 inISU Extension publication PM 1649, “Soybean cyst nematode-resistantsoybean varieties for Iowa.” This work is supported by soybean checkofffunds from the Iowa Soybean Association.The annual list of SCN-resistant soybean varieties has just been updatedwith information about varieties available for the 2012 growing season.Information in the publication is organized by maturity group and companyand includes the relative maturity, herbicide resistance, iron deficiencychlorosis tolerance rating and source of SCN resistance of the varieties (seefigure 1).There are 807 varieties in the updated publication, which is only six fewerthan last year’s record high number of 813 varieties (see figure 2). Thevarieties are from 42 companies, Iowa State University and the University ofMissouri. There are 151 varieties in late maturity group 0/group 1, 346varieties in maturity group 2, and 310 varieties in maturity group 3.  Almost allof the varieties possess SCN resistance from the PI88788 breeding line(also called the source of resistance). Most of the varieties are glyphosateresistant, nearly 10 percent are LibertyLink® and several varieties, includingall of those from Iowa State University, have no herbicide resistance.In total, there are 21 SCN-resistant soybean varieties listed in the publicationthat were developed by Iowa State University scientists, all with soybeancheckoff funding from the Iowa Soybean Association. Two of the varietiescontain unique sources of SCN resistance. Variety “IAR2101 SCN” (maturitygroup 2) has SCN resistance from PI88788 in combination with PI507354,and variety “IAR3001 Phyto SCN” (maturity group 3) has SCN resistance fromPI438489B and PI90363.Iowa State University’s management recommendations for SCN are onlinein a downloadable format, Soybean Cyst Nematode (SCN) ManagementRecommendations, IPM 63. Additional information about the biology,scouting and management of SCN can be found atwww.soybeancystnematode.info. And results of evaluation of SCN-resistantsoybean varieties at numerous locations throughout Iowa can be found atwww.isuscntrials.info. Greg Tylka is a professor of plant pathology with extension and researchICM Home ISU Extension Calendar Publications Extension News County Offices Contact Us5/5/2014 scn resistant soybean varietieshttp://www.extension.iastate.edu/CropNews/2011/1021tylka.htm 2/3responsib ilities in management of plant-parasitic nematodes. Figure 1. Iowa State University’s annual list of SCN-resistant soybeanvarieties includes company contact information, variety brand and names,relative maturity, herbicide resistance, iron chlorosis tolerance, andsource of SCN resistance. Figure 2. The number of SCN-resistant soybean varieties in late maturitygroup 0 and maturity groups 1, 2, and 3 for Iowa growers since 1991.  Thered portion of each bar represents the number of varieties with resistancefrom a source other than PI88788 resistance. This article was published originally  on 10/21/2011 The inf ormation contained within the article mayor may  not be up to date depending on when y ou are accessing the inf ormation.5/5/2014 scn resistant soybean varietieshttp://www.extension.iastate.edu/CropNews/2011/1021tylka.htm 3/3Copyright ©2014 Iowa State University Extension | Iowa State UniversityContact us | For Staff | Nondiscrimination and Information Disclosures | CMS AdminLast Updated 10/21/2011Links to this material are strongly  encouraged. This article may  be republished without f urtherpermission if  it is published as written and includes credit to the author, Integrated CropManagement News and Iowa State Univ ersity  Extension. Prior permission f rom the author isrequired if  this article is republished in any  other manner.

Know Your Choices: Hundreds of SCN-resistant Soybean Varieties For Iowa

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Know Your Choices: Hundreds of SCN-resistant Soybean Varieties For Iowa

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