b'Nematodes Planting SummaryNematode Injury To Emerging Stems Planter Issues That Are Row Specific There are a number of issues that canRoot lesion nematodes (Pratylenchus pen- Manythingscanhappenatplanting happentocausepooremergenceoretrans) at high levels can cause signifi- thateffectseedemergenceandstand reducedstandcount.Thislistbrieflycant injury to roots and allow secondary that are related to the planter setup.explainsanddemonstratessomecom-pathogens to infect, slowing emergence. mon issues. This typically occurs when potato seed Some common issues that happen areisplantedearlyandhasaprolonged fertilizer misses, guess rows not properly Some problems may be confused withemergence period.lined up, planter pattern not lined up, other problems. For diseases and herbi-variable seed depth, when planting too cides, laboratory testing can confirm thefast (can cause skips or doubles), broken presenceofoneoftheseissues.ormalfunctioningplantercups,and Immediately getting good samples to arunning out of seed. laboratory will improve the chances ofproper identification. At times there are problems that cause apoor emergence that cannot be identi-fied. In these cases, please contact yourlocalExtensionspecialistorpotatoRootlesionnematodeinjurycan expert to help with diagnosis.causevariedemergence.(Andy Fertilizermisses.(AndyRobinson,Robinson,NorthDakotaState NorthDakotaStateUniversity/University/University of Minnesota) University of Minnesota)MAY/JUNE 2021 POTATO GROWER 23'