Resistance among New Prunus Rootstocks and Selections to Root-knot Nematodes in Spain and France

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  • 1 Departamento de Patología Vegetal, Institut de Recerca i Tecnologia Agroalimentàries,Crta. de Cabrils s/n 08348, Cabrils, Barcelona, Spain
  • 2 Laboratoire de Biologie des Invertébrés, Institut National de la Recherche Agronomique, B.P. 2078, 06606 Antibes Cedex, France
  • 3 Station de Recherches Frutierès, Institut National de la Recherche Agronomique, B.P. 81, 33883 Villenave d'Ornon Cedex, France
  • 4 Servicio de Investigación Agraria, Apartado 727, 50080 Zaragoza, Spain

New Prunus rootstocks and selections were evaluated for their reaction to Meloidogyne arenaria (Neal) Chitwood, M. incognita (Kofoid & White Chitwood), or M. javanica (Treub) Chitwood. Most of the clones were peach-almond hybrids (P-AHs) [P. persica (L.) Batsch × P. dulcis (Mill.) D.A. Webb] or plums of Spanish and French origin. In a first experiment, the P-AH Hansen 2-168 and plums GF-31 (P. cerasifera Ehr.) and GF 8-1 (P. cerasifera × P. munsoniana Weigth et Hedr.) were highly resistant to the mixture of five isolates of M. javanica. The P-AHs Barrier and Titan × Nemared were resistant and moderately resistant, respectively; GF-677, MB 3-13, MB 2-2, and MB 2-6 were susceptible. In the second and third experiment, the plums P 1079, P 2175, the hybrids Afgano (P. dasycarpa Ehrh.), G × N No 22, and G × N No 15, both P-AHs, and Nemared peach were highly resistant to mixtures of five isolates of M. incognita or M. arenaria. The plums P 2980 (P. cerasifera) and GF 8-1 tested against either root-knot species were also highly resistant. Cachirulo × (G × N No 9), a P-AH, showed less resistance to M. arenaria than to M. incognita. Montclar (P. persica) and the P-AHs Torrents AC and GF-677 were susceptible to both species.

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