L.K. Carta, Z.A. Handoo, Nematology Laboratory, United States Department of Agriculture, Beltsville, Maryland, USA 20705; T.O. Powers, Department of Plant Pathology, University of Nebraska, Lincoln, Nebraska, USA 68583; S.A. Miller, Plant Quarantine Pest Unit, Canadian Food Inspection Agency, Ottawa Laboratory (Fallowfield), Ontario, K2H 8P9 Canada; R. Pérez-Zubiri, and A. Ramírez-Suárez, SAGAR...