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New Host Races of Meloidogyne arenaria, M. incognita, and M. javanica from Horticultural Regions of Spain

February 2009 , Volume 93 , Number  2
Pages  180 - 184

L. Robertson and M. A. Díez-Rojo, Dpto Agroecología, Centro de Ciencias Medioambientales (CCMA), Consejo Superior de Investigaciones Científicas (CSIC). Serrano, 115 dpdo, 28006 Madrid; J. A. López-Pérez, Centro Agrario de Marchamalo. Camino de San Martín s/n, 19180 Marchamalo, Guadalajara, Spain; A. Piedra Buena and M. Escuer, CCMA-CSIC; J. López Cepero, Dpto Ingeniería, Producción y Economía Agraria. Universidad de La Laguna (ULL). Crta Geneto, 2, 38271 La Laguna, Tenerife, Canary Islands, Spain; and C. Martínez and A. Bello, CCMA-CSIC

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Accepted for publication 21 October 2008.

In total, 140 populations of the genus Meloidogyne collected from representative horticultural regions of Spain and maintained at the Department of Agroecology, Institute of Agrarian Sciences, Madrid were characterized using perineal morphology, sequenced characterized amplified region polymerase chain reaction with species-specific primers, and bioassay. Using a modified North Carolina differential host test as a basis, 13 Meloidogyne populations did not fit into the published race scheme. These populations had very limited host ranges, reproducing only on susceptible tomato cv. Marmande and sometimes also on tobacco cv. NC95 and the pepper cv. Sonar in the case of Meloidogyne arenaria. They did not reproduce on cotton or peanut. The species and new races were identified as M. incognita races 5 (6 populations) and 6 (2 populations) and M. javanica race 5 (2 populations), with new records of M. arenaria race 3 (2 populations) and M. javanica race 1 (23 populations) for Spain.

© 2009 The American Phytopathological Society