INTERACTIONS AMONG SELECTED ENDO-PARASITIC NEMATODES AND 3 PSEUDOMONADS ON ALFALFA

  • 1 January 1982
    • journal article
    • research article
    • Vol. 14  (1) , 105-109
Abstract
Meloidogyne hapla, Pratylenchus penetrans and Helicotylenchus dihystera reduced the growth of ''Saranac AR'' alfalfa seedlings when applied at concentrations of 50 nematodes/plant. All except P. penetrans reduced seedling growth when applied at 25/seedling. M. hapla reduced growth when applied at 12/seedling. Nematodes interacted with 3 pseudomonads [Pseudomonas viridiflava, P. corrugata, P. marginalis] to produce greater growth reductions than were obtained with single pathogens, suggesting synergistic relationships. Ditylenchus dipsaci, applied at 25 or 50 nematodes/seedling, reduced plant weight compared with weights of control plants, but did not interact with test bacteria. All of the nematodes except D. dipsaci produced root wounds which were invaded by bacteria.

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