Histopathology of Root Gall Induced in Tomato by Globodera pallida.

Received for publication 15 July 1985. t Nematologist, Istituto Nematologia Agraria, CNR, via Amendola 165/A, 70126 Bari, Italy. Nematologist, Servicio Agricola y Ganadero, Division Protection Agricola, Ministerio de Agricultura, Santiago, Chile. s Nematologist, Division of Plant Industry, P.O. Box 1969, Gainesville, FL 32602. cliophora arenaria Raski, Longidorus spp., Paratrichodorus spp., Trichodorus spp., or Xiphinema spp. (6,7,9). Galls on root tips and root axes are specific symptoms of Meloidogyne spp. and Nacobbus spp. infections (4). Galls on root axes have also been reported on only some hosts of Rotylenchulus macrodoratus Dasgupta, Raski, and Sher (8). Among species of Heteroderidae, root galls have been reported only in tomato (Lycopersicon esculentum Mill.) infected by Globodera rostochiensis (Woll.) Mulvey and Stone (1,2,5). We report an unusual swelling o f tomato roots infected by a Chilean population of G. paUida (Stone) Mulvey and Stone. The pathology of this root reaction