The Weakening Effect as a Trigger for Biological Control and Criteria for Its Evaluation

  • J. Katan
  • C. Ginzburg
  • S. Freeman
Part of the NATO ASI Series book series (NSSA, volume 230)

Abstract

Eradication of a pathogen population with high dosages of killing agents involves many difficulties: detrimental effects on nontarget beneficial organisms, high cost, environmental pollution, and problems of application. This is especially true with soilborne pathogens which are deeply embedded in the soil and are strongly affected by antagonists. An alternative means of control would be to use sublethal dosages which weaken the pathogen and enable reasonable and effective control while minimizing the above difficulties. The main question is, under what conditions and with which pathogens can such a sublethal treatment (which initially causes only a partial reduction of pathogen population) lead, at a later stage, to a reduction in inoculum density and inoculum potential. In this presentation we shall place the emphasis on soilborne pathogens although the major concepts are relevant also to foliar pathogens.

Keywords

Fusarium Oxysporum Heat Shock Response Inoculum Density Pathogen Population Methyl Bromide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • J. Katan
    • 1
  • C. Ginzburg
    • 2
  • S. Freeman
    • 1
  1. 1.Department of Plant Pathology and Microbiology, Faculty of AgricultureThe Hebrew University of JerusalemRehovotIsrael
  2. 2.Department of Ornametal Horticulture AROThe Volcani CenterBet DaganIsrael

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