b'NematodesPlantingSummaryNematode Injury To Emerging StemsPlanter Issues That Are Row SpecificThere are a number of issues that can Root lesion nematodes (Pratylenchus pen- Manythingscanhappenatplantinghappentocausepooremergenceor etrans) at high levels can cause signifi- thateffectseedemergenceandstandreducedstandcount.Thislistbriefly cant injury to roots and allow secondarythat are related to the planter setup. explainsanddemonstratessomecom-pathogens to infect, slowing emergence.mon issues.This typically occurs when potato seedSome common issues that happen are isplantedearlyandhasaprolongedfertilizer misses, guess rows not properlySome problems may be confused with emergence period. lined up, planter pattern not lined up,other problems. For diseases and herbi-variable seed depth, when planting toocides, laboratory testing can confirm the fast (can cause skips or doubles), brokenpresenceofoneoftheseissues. ormalfunctioningplantercups,andImmediately getting good samples to a running out of seed.laboratory will improve the chances of proper identification. At times there are problems that cause a poor emergence that cannot be identi-fied. In these cases, please contact your localExtensionspecialistorpotato Rootlesionnematodeinjurycanexpert to help with diagnosis. Fertilizermisses.(AndyRobinson, causevariedemergence.(Andy Robinson,NorthDakotaStateNorthDakotaStateUniversity/University/University of Minnesota) University of Minnesota)IF YOU KNOW, YOU GROW Minnesota Certied Seed Potatowww.mda.state.mn.us/potatoMAY/JUNE 2023 POTATO GROWER 15'