Host Efficiency of Bermudagrass to Meloidogyne incognita and Meloidogyne arenaria


  • G. L. Windham
  • G. E. Brink


Bermudagrass, Cynodon dactylon, Meloidogyne arenaria, Meloidogyne incognita, Resistance, Root-Knot Nematode


Host efficiencies of ten hay and pasture bermudagrasses (Cynodon dactylon) for the four Meloidogyne incognita host races and three M. arenaria race 2 populations were determined in the greenhouse. Rooted stem cuttings were inoculated with 1 500 nematode eggs, then grown for 60 days, when eggs were extracted from roots and counted. The cultivars Coastal, Coastcross-1, Grazer, and Tifton 44 were resistant to all populations of both nematode species. The cultivars Alicia, Lancaster, and Tifton 78 were resistant to all populations of M. arenaria race 2, but in some cases supported significant reproduction by races 3 and 4 of M. incognita. The cultivars Calley and Maddox were susceptible to all races of M. incognita and all populations of M. arenaria race 2 except for one population of M. arenaria from North Carolina, which reproduced poorly or none on Calley. A common bermudagrass genotype was resistant to races 2 and 3 of M. incognita and resistant to all populations of M. arenaria race