A New Problem and Old Questions: Potato Psyllid in the Pacific Northwest. Issue 4 (8th December 2015) - Horton, David R.; Cooper, W. Rodney; Munyaneza, Joseph E.; Swisher, Kylie D.; Echegaray, Erik R.; Murphy, Alexzandra F.; Rondon, Silvia I.; Wohleb, Carrie H.; Waters, Timothy D.; Jensen, Andrew S.