title: Vertical Migration of Meloidogyne chitwoodi and M. hapla under Controlled Temperature.
abstract: Migratory ability of second-stage juveniles (J2) of two Meloidogyne chitwoodi races and a M. hapla population were compared in soil-filled columns at 12, 18, and 24 C. J2 of all populations migrated farthest at 18 C and least at 12 C. Nematode survival was significantly reduced (P = 0.05) at 24 C.M. chitwoodi J2 migrated further and in greater numbers than M. hapla J2 at all temperatures. A comparison with and without a host plant demonstrated no preferential migration toward the plant. Water percolation through the migration columns stimulated upward migration.
authors.forename: J N
authors.initials: JN
authors.lastname: Pinkerton
authors.forename: H
authors.initials: H
authors.lastname: Mojtahedi
authors.forename: G S
authors.initials: GS
authors.lastname: Santo
authors.forename: J H
authors.initials: JH
authors.lastname: O'Bannon