b'ple times during the season. This projectferentNapplicationpatterns(allNexplore how genotype and harvest prac-builds on Dr. Rosens previous work pre- appliedbeforeplanting,halfappliedticeseffectdormancy.Specifically,we dicting N status of potatoes from dronebefore planting and half at emergence,are evaluating dormancy for three russet imagery for commonly grown varieties.and three equal applications one beforegenotypes, killed at two different dates This study is an opportunity to expandplanting, one at emergence, and one at(90 and 110 days after planting), with thosemodelstoapplytopotatoesflowering).Alltreatmentswillreceivetwodifferentintervalsbetweenvine regardless of their variety.This work isthesametotalamountofN.Wewillkills and harvest (14 days and 21 days). funded by an MDA specialty crop blockcompare genotypes and treatments forWewillassesstheeffectofthese12 grant. their effect on yield and skin finish. Thistreatmentcombinationsondormancy isoursecondyearcollectingdataforand the biochemical pathways involved The availability of N in a potato field,this project and it has been funded inin maintaining dormancy.depends not only on the total amountbothyearsbytheMinnesotaAreaII of N added but also on the timing of NPotato Research and Promotion CouncilIn collaboration with Dr. Ashish Ranjan application. Our previous studies of Nand the NPPGA. and Pepsi Co we are growing nine of our efficiency in red fresh market potatoesselected clones in the newly developed show that N response is variety depend- ThePotatoesUSAPotatoResearchverticilliumwiltnursery.Thisexperi-ent.WehypothesizethatresponsetoAdvisory Council, has identified main- ment will allow us to identify resistant the timing of N application will differtainingdormancywithoutchemicalclonesandeventuallyincombination by variety as well. Dr. Thomas Stefaniak,sprout inhibitors as an urgent researchwith the genotype data we have gath-a researcher in the lab, is growing eightquestion for the industry. We are work- ered, facilitate identifying genes under-red fresh market cultivars with three dif- ingwithDr.MunevverDogramacitolyingverticilliumwiltresistance. IF YOU KNOW, YOU GROW Minnesota Certied Seed Potatowww.mda.state.mn.us/potatoJULY/AUGUST 2022 POTATO GROWER 19'