b'2023 International Crop ExpoThe 2023 International Crop ExporesearchshesaidNorthDakotathefirstyearofthisstudyvine was held February 22nd and 23rd atState University has conducted irri- killing at 10 days before harvest pro-theAlerusCenterinGrandForks,gatedpotatoresearchforover30videdimprovedskinstrengthand North Dakota. Dr. Andy Robinson,years.Over that time, growers haveyield was similar to green digging, NDSU/UMNExtensionPotatogenerouslysupportedthisresearchMore research is needed to confirm Agronomistplanstheeducationaland have had access to the wealththese findings. The late blight spore speakers for the show.ofinformationgeneratedinthetrappingnetworkfoundnoDNA areas of cultivar development, gen- from late blight spores. The variety Dr. Andy Robinson introduced theeral cultural management practicestrial focused on 8 red and 18 yellow first speaker, Dr. Julie Pasche, NDSU.such as vine desiccation, herbicideskinned varieties. The location they Dr.Paschegaveapresentaiononefficacy and damage, nutrient man- wereplantedhadsaltandcom-adjusting the planting date for theagement,physiologicaldefectspaction issues for about 80% of the managementofVerticilliumwiltincludingsugarendsanddiseaseplots, so data were not reliable and and she also spoke on the supportmanagement, among others.notreported.Finally,astudywas forirrigatedpotatoresearchfordone to compare herbicide recovery North Dakota and Minnesota.NextDr.AndyRobinson,products.Withtheapplicationof NDSU/UMN spoke on potato agron- dicamba little injury was seen, mak-Juliesaid,Theobjectivesofthisomymanagementstudiesin2021ing it difficult to evaluate products research was to determine the effectandthelateblightsporetrappingthat claim to improve plant recov-ofplantingdatesonthedevelop- networkforNorthDakotaandery following herbicide injury. mentofVerticilliumwiltutilizingMinnesota. Andy said, The potato three russet-skinned cultivars vary- agronomy studies have looked at aDr.AsuntaSusieThompson, ing in Verticillium wilt susceptibili- varietyofquestionsthispastyear.NDSU, talked about potato breeding ty (Russet Burbank, Umatilla Russet,One study has focused on utilizingandcultivardevelopment.Susie and Alturas Russet) planted on threeturkey manure as a source of nitro- said, The potato, a nutritious food dates. Trials conducted in west-cen- gen.Itwasfoundthatturkeyhigh in potassium, vitamin C, and tral Minnesota under irrigated con- manureappliedat3or5tons/aothernutrients,isanimportant ditionsin2020,2021,and2022with 50 or 100 lb N/a as ESN hadhorticultural crop in North Dakota, measuredvisualVerticilliumwilt,similaryieldandsizewhencom- Minnesota, and the Northern Plains totalandmarketableyield,andpared with the grower standard. Aand was produced on about 74,000 grower return ($) / acre. Stem colo- study looking at vine desiccation onacresin2022;stringentspecifica-nization by V. dahliae was also col- skinsetofRussetBurbankpotatotionsexistforeachmarkettype. lectedtoaidinelucidatingthefoundthat21daysbeforeharvestWhile breeding and cultivar devel-effect planting date on the return ofresultedinthebestskinset,butopment are long-term processes, the inoculum to the soil as vines desic- compromisedyieldandspecificNDSUpotatobreedingprogramas cate.gravity,whilenodesiccationhadpart of the NDSU potato improve-improved yield and specific gravitymentteamconductsconventional On The support for irrigated potatobutskinstrengthwasweak.Frombreedingefforts,germplasm 22 POTATO GROWER MARCH 2023'