Interaction of Meloidogyne naasi, Pratylenchus penetrans, and Tylenchorhynchus agri on Creeping Beentgrass

Authors

  • R. A. Sikora
  • D. P. Taylor
  • R. B. Malek
  • D. I. Edwards

Abstract

The pathogenicity and interactions of Meloidogyne naasi, Pratylenchus penetrans, and Tylenchorhynchus agri on 'Toronto C-15' creeping bentgrass, Agrostis palustris, was studied in a long-term greenhouse experiment. Based on dry weights of roots and clippings, M. naasi alone and in all combinations with P. penetrans and T. agr/was highly pathogenic to creeping bentgrass. P. penetrans and T. agr/alone and in combination inhibited root growth but adversely affected top growth only when the two were co-inoculated. In combination, the effects of each species on top growth were additive, with M. naasi the dominant pathogen. Creeping bentgrass was an excellent host for M. haas/and T. agr/, but a poor host for P. penetrans T. agri inhibited population increase of M. naasJ, indicating nematode-nematode competition, but neither T. agr/ nor P. penetrans was affected by any of the combinations. Key words: Agrostis palustris, root-knot nematode, lesion nematode, stunt nematode, pathogenicity, population dynamics, nematode complexes.

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Published

1972-07-15

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Section

Articles