Plant and Soil

, Volume 81, Issue 1, pp 69–74 | Cite as

The relation between cation-ratio and host-resistance to certain downy mildew and root-knot diseases

  • S. S. Bains
  • J. S. Jhooty
  • N. K. Sharma


The (Ca+Mg)/K ratio was found to have a relationship with the resistance of various crops to downy mildew and root-knot diseases. Predisposing factors such as host nutrition, prior infection by other pathogens and plant age changed (Ca+Mg)/K ratio. (Ca+Mg)/K ratio calculated from the published data of other workers also exhibited this relationship. It appears to play a role in several host-pathogen systems.

Key words

Cation-ratio Disease Nutrition Sclerophthora rayssiae var.zeae Pseudoperonospora cubensis Peronospora parasitica Meloidogyne incognita 


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Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1984

Authors and Affiliations

  • S. S. Bains
    • 1
  • J. S. Jhooty
    • 1
  • N. K. Sharma
    • 2
  1. 1.Department of Plant PathologyPunjab Agricultural UniversityLudhianaIndia
  2. 2.Department of EntomologyHimachal Pradesh Agricultural UniversitySolanIndia

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