Kearney Agricultural Research and Extension Center
University of California
Kearney Agricultural Research and Extension Center

The Replant Problem

by Michael V. McKenry


  1. Introduction

  2. Characterization of RP
    B-1. Descriptions and Photographs
    B-2. Symptoms of the Replant Problem

  3. Historical Perspectives

  4. A Working Hypothesis for RP – Four Components Described

  5. Relative Incidence of the Four Components of RP in California
    E-1. Crop-Related Incidence of Specific Soil Pests and Diseases
    E-2. Spatial and Regional Incidence of Soil Pests and Diseases
    E-3. More on the Rejection Component of RP

  6. Current Management Methods of RP
    F-1. Absence of an IPM Approach with Predictability
    F-2. Fallow Periods
    F-3. Soil Profile Modification and Fumigation
    F-4. Strip, Spot or Solid Treatments


  1. Experimental Methods and Methods
    G-1. Field Trials
    G-2. Small Experimental Plots
    G-3. Commercial Plots

  2. Results and Discussion
    H-1. Comparison of More than 135 Potential Alternatives to Solve Components of RP
    H-2. Characteristics of Specific Treatment Approaches Evaluated

  3. Methods that Kill Remnant Woody Roots and the Implications
    I-1. Anaerobic Conditions
    -2. Physical Removal of Remnant Roots
    I-3. Root Penetrating Soil Fumigants
    I-4. Systemic Herbicides Plus 18 Mo Fallow
    I-5. Experiences With Packages of Specific Treatments
  4. Best Management Methods for Specific Tree/Vine Situations

  5. Future Management Methods that Need Field Evaluation with Juglans, Prunus and Vitis

  6. Field-Grown Nursery Crops

  7. Literature Cited


  1. Appendix
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