b'UMN, talked on evaluating selectedstem number, tuber set, and yield)Threecultivars(RussetBurbank, legacyUMNpotatocultivarsforwill be examined among a replicat- UmatillaRussetandAlturaswere nitrogen efficiency and potential foredfieldtrialconductedattheplantedonthreedates(April24, release. She discussed several legacyLarimore,NorthDakotaresearchMay 8, and May 21) in fumigated clonesinthebreedingproject,field plot in 2022. andnon-fumigatedblocks.Heat including six russet, three red, andstressandbacterialvinerotwere onechip,andtwospecialtyselec- Dr. Carl Rosen, UMN, spoke on hisevidentonSeptember1.Thepre-tions. Polaris Gold (MN04844) is anutrientmanagementstudiesonliminary results indicated coloniza-lateseasonyellow,andPaisleyirrigatedpotatoes.Dr.Rosenpro- tionbyVerticilliumdahliawas Purple,aninterestingpurpleandvided a summary of several nutrientincrease with delayed planting, and buff selection (MN07112) has pur- managementstudiesonirrigatedthat this was likely due to low tem-ple flesh.MN13142, is a russet withpotatoes, including their work withperatures at planting for the earliest longdormancy(morethan9responsetophosphorusonhighdates,makingtheVerticilliumless monthswhenstoredat50F),PVYphosphorussoils.Potatoistheactive as it needs a soil temperature resistance, and is moderately resist- mostresponsetophosphorous(P)above 60o F, which wasnt attained ant to pink rot.Dr. Shannon alsoofallcrops,butresponsetoPisuntilaftermid-May.Sheplansto described their work with nitrogensomewhatunpredictable.Studiesrepeatthestudy;intheinterim, applicationandtimingforselec- were conducted in 2020 and 2021growersmayusethispracticeon tions within their program.withRussetBurbankandIvoryhighriskfields,susceptibleculti-Russet at Becker, Minnesota.vars,andwhenfieldshavehad Dr.DarrinHaagenson,USDA/ARS,manypotatocropsand/orwhere spokeontheimpactofBannockIn 2021, the combination of bandedtheywereunabletofumigateor seed age on yield components. HeP and fumigation (Vapam) resultedwherefumigationdoesnotreduce said, The impact of seed physiolog- in the highest yields; banding alsoinfection levels below the risk toler-ical age of North Dakota producedprovides an advantage of decreasedance. Bannock is being investigated. Infertilizercosts.Dr.Rosenalso October2021,threeBannockseedreportedontheirworkwithbios- Dr. Pasche gave a second presenta-lotsgrownundersimilarNorthtimulants, first starting with a work- tiondescribingthepurposeand Dakotafieldconditionswerehar- ingdefinitionofwhatbiostimu- researchconductedattheInkster, vested and transported immediatelylantsarebasedonthe2018FarmNorth Dakota, research site, provid-to the USDA-ARS laboratory in EastBill.Four biostimulants, two nitro- ing many examples of why this site GrandForks,Minnesota.Tubergen(N)rates,andtwoNsourcesissoimportanttothepotato aging treatments were implementedwere compared in a study in 2021.research teams at NDSU.tosimulatecontrastingstorageIn this trial, the best yield and grade degree days that will provide diversewereobtainedusingthreetonsofThe afternoon session was complet-physiological seed age.Seven seedcomposted turkey manure and ESNedwithafunphone-appgrower agingtreatmentswereimposedat 166 lbs. N/acre.poll designed by Dr. Any Robinson, through a combination of increasedUMN/NDSUExtensionPotato temperature (12, 22, and 32C) andDr. Julie Pasche, NDSU, spoke aboutAgronomist,abouttopicsranging contrasting storage duration.Afteradjustingplantingdatesforthefrom details about individual opera-aging, the seed is being held at 4CmanagementofVerticilliumWilt.tions,toherbicideuseandselec-until planting in Spring, 2022.TheShe provided a report ofher worktion, to the utilization of biostimu-impact of seed age on Bannock fieldwithadjustingplantingdateforlants. growthparameters(emergence,managementofVerticilliumwilt.MARCH 2022 POTATO GROWER 29'