Plant and Soil

, Volume 139, Issue 1, pp 1–6 | Cite as

Effects of nematodes, fungi and bacteria on the growth of young apple trees grown in apple replant disease soil

  • R. S. Utkhede
  • T. C. Vrain
  • J. M. Yorston


Growth, dry root weight of seedlings and root score of apple seedlings cv. McIntosh were reduced when soils were inoculated with Pratylenchus penetrans, Penicillium janthinellum, Constantinella terrestris, Trichoderma sp., and 4 strains of Bacillus subtilis. Trichoderma sp., and B-1 and B-26 strains of B. subtilis alone reduced plant growth but the combination of Trichoderma sp. + B. subtilis (B-1) and Trichoderma sp. + B. subtilis (B-26) increased plant height. Plant height, root weight and root score were significantly reduced when P. penetrans plus B. subtilis or P. penetrans plus fungi plus bacteria were present in the soil. It is suggested that fungi, bacteria, nematodes alone or their combinations such as nematodes plus bacteria or nematodes plus fungi plus bacteria may contribute towards the occurrence of apple replant disease.

Key words

apple replant disease bacteria fungi nematode interaction soil borne pathogens 


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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • R. S. Utkhede
    • 1
  • T. C. Vrain
    • 2
  • J. M. Yorston
    • 3
  1. 1.Research Station, Agriculture CanadaSummerlandCanada
  2. 2.Research Station, Agriculture CanadaVancouverCanada
  3. 3.British Columbia Ministry of Agriculture and FisheriesKelownaCanada

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