b'DevelopingProcessingCultivarsfortheNorthern Plains - 2019 Oakes Summaryby Dr. Asunta (Susie) Thompson, NDSU Potato BreederAbout 60% of potatoes produced in the setselectionswerecomparedtofive 99 percent, with a mean of 96 (Table 1).northernplainspotatoproduction industrystandards;whileRusset StemsperplantdifferedsignificantlyregionofNorthDakota(ND)and Norkotah is not a processing standard, it and ranged from 1.4 to 2.8.Stems perMinnesota (MN) are for frozen process- isanimportantfreshmarketcultivar plant is a function of seed size, tuber eyeing, predominantly French fries.Russet and serves as a check for early yield and numberanddistribution,strengthofBurbank continues as the leading culti- a poor processor in our French fry eval- dormancy, and other factors; generally,vargrownacrossthesevenmajorfall uations, particularly from storage.The an average of 2.5 stems per cultivar ispotatoproductionstates,including trial was planted on May 13, as a ran- idealforprocessinggenotypessuchasNorth Dakota and Minnesota, but new domized complete block with four repli- Russet Burbank.Vine sizes differed sig-cultivarsarebeingdevelopedand cates.Cultural practices typical of the nificantly, as expected, and ranged fromreleasedbyseveralNorthAmerican growingareaforRussetBurbankwere medium (scale of 1 to 5 with 1 beingpotatobreedingprograms,including used during the growing season, includ- verysmall,to5beingverylarge)forNDSU.Two of our most recent releases, ing sprinkler irrigation.Rows were 36 ND13245C-3Russ,tolarge,forRangerDakota Trailblazer and Dakota Russet are inches apart, with a 12-inch within-row Russet.Due to our short growing sea-focused at this market, addressing short- spacing.Thetrialwasharvestedon sons,earlymaturityisanimportantcomingsofRussetBurbank,andboth September 4 using a single row Grimme attribute in northern production areas.are finding niches in global potato pro- harvester; days to harvest were 113.We Vinematuritydifferedsignificantlyascessing.Elongate and blocky potato cul- attempt to mimic what many processor expected,rangingfrom2.1fortivarspossessinghighspecificgravity growersdointermsofgreendigging; ND113065CB-1Russ and ND113065CB-(an indirect measure of dry matter), low however, green digging is often associat- 2Russ, to 5 for ND13103B-1Russ (scale ofsugar accumulation both out of the field ed with more skinning and an increase 1 (very early) to 5 (very late)), with aand storage, light fry color, resistance to in storage management required imme- mean of 3.2. the sugar end disorder, hollow heart and diately following harvest.other defects, and that are economically Total yields differed significantly, rang-andenvironmentallysustainable,are Agronomic evaluations, yield and grade, ing from 266 cwt./acre for ND13252B-desirable.Trials evaluating dual-purpose and quality attributes are summarized in 6Russ,to467cwt/acreforUmatilla(processing and fresh market potential) Tables 1, 2 and 3.Percentage stand sig- Russet(Table2);themeanwas355russetsareconductedatLarimoreand nificantly differed, varying from 91 to cwt./acre across the 16 entries.Yield ofOakesinNorthDakota,andatParkRapids,Minnesota.Thissummary The Insulation Placereports the results from the 2019 OakesProcessing Trial.Sincere thanks to Kelly 14770 69th Place NEGrafton, ND 58237 Cooper, Heidi Eslinger, and Seth Nelson Urethane Spray-On InsulationfortheirhelpattheOakesResearch Eliminates air infiltration & stops condensationExtensionCenter.Anadditionaltrialwas also grown at the Oakes site, a fresh \x00 Highest R-Value Insulation \x00 Fire Proofingmarket trial looking at red and yellow \x00 Moisture Barriers \x00 Flat Roofsskinned selections. Grafton(701) 352-3233 1-800-352-0620Bismarck(701) 255-0025 1-866-425-0025In 2019, 11 advancing dual-purpose rus- Website www.theinsulationplace.com10 POTATO GROWER JULY/AUGUST 2020'