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
Article

Summary

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 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Bains S S and Jhooty J S 1978 Increased susceptibility of virus infectedBrassica juncea toPeronospora parasitica. Plant Dis. Reptr. 62, 1043–1046.Google Scholar
  2. 2.
    Bains S S and Jhooty J S 1978 Relationship between mineral nutrition of muskmelon and development of downy mildew caused byPseudoperonospora cubensis. Plant and Soil 49, 85–90.Google Scholar
  3. 3.
    Bains S S and Jhooty J S 1979 Mixed infections byAlbugo candida andPeronospora parasitica onBrassica juncea inflorescences and their control. Indian Phytopath. 32, 268–271.Google Scholar
  4. 4.
    Balasubramanian K A 1975 Influence of nitrogen and phosphorus fertilizers on the expression of downy mildew of sorghum. Plant and Soil 43, 621–626.Google Scholar
  5. 5.
    Boning Karl 1976 Relations between nutriton and susceptibility to parasitic and nonparasitic diseases in plants. Plant Research and Development 4, 24–33.Google Scholar
  6. 6.
    Brown J W and Wadleigh C H 1975 Influence of sodium bicarbonate on the growth and chlorosis of garden beets. Bot. Gaz. 116, 201–209.Google Scholar
  7. 7.
    Chapman H D and Pratt D F 1961 Methods of Analysis for Soils, Plants and Water. Univ. Calif. Div. Agric. Sci. Berkely.Google Scholar
  8. 8.
    Dekock P C and Hall A 1955 The phosphorus-iron relationship in general chlorosis. Plant Physiol. 30, 293–295.Google Scholar
  9. 9.
    Jackson M L 1968 Soil Chemical Analysis. Asia Publishing House, Bombay.Google Scholar
  10. 10.
    Sherwood R T and Huisingh D 1970 Calcium nutrition and resistance of alfalfa toDitylenchus dipsaci. J. Nematology 2, 316.Google Scholar
  11. 11.
    U. S. Salinity staff 1954 Diagnosis and improvement of saline alkaline soil, USDA Handbook 60.Google Scholar
  12. 12.
    Wallace J Kuc and Draught H N 1962 Biochemical changes in the water insoluble material of maturing applefruit and their possible relationship to disease resistance. Phytopathology 52, 1023–1026.Google Scholar

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

Personalised recommendations