b'North Dakota and MinnesotaInkster, North DakotaWe are looking at the potential of injurycausedbyimazamox(Raptor),clopy-ralid(Stinger)andaminopyralid(Milestone) herbicide injury in motherplants on daughter tubers. Hoople, North DakotaWe are testing nitrogen rates and seedspacingfortheadvancedselectionsND7799c-1 and ND7519 and how theycomparewithDakotaPearl.Thechiptrial site is hosted by Oberg farms. Wealso have a yellow and red variety trialswherewillbelookingatgradedyieldand storability. There are 30 yellow and20redpotatoesvarietiesoradvancedselectionsbeingevaluated.ThefreshpotatotrialsarehostedbyJGHall&Sons. We plan on demonstrating tubersfrom these variety trials at field day andat a winter Tater Talk. The late blight spore trapping networkthisyearwillbespreadacrossNorthAs you may have noticed in the maga- betweenbroadcastturkeycompost, Dakota and Minnesota potato growingzine,theHerbicideInjuryinPotatoes urea,ESNandbandedESNinRusset areas. Thank you to all the grower coop-poster can be pulled out of the magazine Burbank. In this study she is evaluating erators who send in the filters each weekforyouruse.Thereisalargerprinted theuptakeandgrowthofplantsand to make this project possible. The pur-versionofthisposterthatisavailable tubersineachtreatment.Wethank pose of the spore traps is to determine iffrom the NPPGA office or from NDSU RDO Farm Division for hosting all the there are any late blight spores in the air.Extension.Thedigitalversioncanbe Perham trials.It does not indicate that late blight isfound at z.umn.edu/herbicide. found in the field, because a dead sporeOakes, North Dakota could be captured from that air. Perham, Minnesota ManyofourtrialsweremovedfromTrialsinPerhamarefocusedonplant MinnesotatoOakesbecauseofthe NDSU Potato Breeding Programnutrition. In one trial we are evaluating uncertainty of travel to Minnesota when Dr. Asunta (Susie) Thompson, NDSUpolymer coating of urea and ammoni- wewereplanningtrials.ThereareaumsulfateonRussetBurbankpotato number of studies in Oakes to evaluate In 2020, irrigated potato breeding trialyield.EnsieAyyildiz,agradstudent newfertilizersonyieldorbruisingof sitesincludeOakes,Larimoreandfrom Turkey, is evaluating the difference potatoes. Inkster, North Dakota, and Park Rapids,JULY/AUGUST 2020 POTATO GROWER 19'