Ice Strains of PseudomonasSyringae Introduced to Control Ice Nucleation Active Strains on Potato

  • Steven E. Lindow
Part of the NATO ASI Series book series (NSSA, volume 230)


A common approach used in the biological control of plant diseases has been to introduce a single strain of a biological control agent to antagonize a target population. This “magic bullet” must antagonize all or most members of a target population to be effective in disease control (Spurr and Knudsen, 1985). Such an approach, however, generally assumes that the target microorganisms have similar ecological properties and display similar epidemiological features. For example, all members of a target population might be assumed to be sensitive to an antibiotic produced by a biological control organism or to utilize similar resources for which competition might be oc-curing. Molecular genetic tachniques have now demonstrated, however, that many plant pathogenic taxa are genetically diverse (Denney et al., 1988). While Restriction Fragment Length Polymorphism (RFLP) analysis of chromosome structure can give an indication of genetic diversity, it does not directly indicate physiological differences between members of a given group. However, the large genetic diversity found in many species of pathogens is suggestive that there will be functional differences in behavior of target microorganisms (Denney, 1988). The study reported here was made in an attempt to define the specificity of interactions of introduced biological control agents with their targets. The specific example to be discussed will be that of bacteria introduced to control epiphytic ice nucleation active (Ice+) bacteria.


Biological Control Leaf Surface Competitive Exclusion Xanthomonas Campestris Navel Orange 
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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Steven E. Lindow
    • 1
  1. 1.Department of Plant PathologyUniversity of CaliforniaBerkeleyUSA

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