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The Effect of Peat Moss Amended with Three Engineered Wood Substrate Components on Suppression of Damping-Off Caused by Rhizoctonia solani

Author

Listed:
  • Anissa Poleatewich

    (Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH 03824, USA)

  • Isobel Michaud

    (Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH 03824, USA)

  • Brian Jackson

    (Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695, USA)

  • Matthew Krause

    (Lallemand Plant Care, Montreal, QC H1W 2N8, Canada)

  • Liza DeGenring

    (Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, Durham, NH 03824, USA)

Abstract

The use of wood-derived materials in soilless substrates for horticultural crop production is increasing; however, there is little information about the effects of wood on the incidence and severity of soilborne diseases of container-grown plants. The objectives of this research were to compare three differently processed wood substrate components blended with sphagnum peat and to investigate the effect of the peat:wood blend ratio on damping-off disease caused by Rhizoctonia solani using radish as a model system. In objective one, raw sphagnum peat was blended with three types of processed pine wood, screw-extruded, twin disc-refined, and hammer-milled, at a volumetric ratio of 70:30 and compared to a 70:30 peat:perlite mix. Radish plants grown in the hammer-milled wood and disc-refined wood had significantly lower damping-off disease severity compared to plants grown in the peat–perlite control. In objective two, sphagnum peat was blended with the three types of processed wood at a volumetric ratio of 90:10, 80:20, and 70:30 and compared to a 70:30 peat–perlite mix. The effect of the blend ratio varied by wood processing type. Higher percentages of Forest Gold and pine tree substrate resulted in lower disease severity. In both objectives, radish plants grown in any of the substrate treatments containing wood infested with R. solani tended to have lower disease severity compared to plants in the control. Results of this study indicate that the blending of processed pine wood-derived components into peat may enhance the natural suppression of damping-off disease of radish. Further research is needed to elucidate the mode of action of wood-derived materials on disease suppression in container-grown crops and to study the effects for other plant pathogens and crop species.

Suggested Citation

  • Anissa Poleatewich & Isobel Michaud & Brian Jackson & Matthew Krause & Liza DeGenring, 2022. "The Effect of Peat Moss Amended with Three Engineered Wood Substrate Components on Suppression of Damping-Off Caused by Rhizoctonia solani," Agriculture, MDPI, vol. 12(12), pages 1-15, December.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:12:p:2092-:d:995487
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    References listed on IDEAS

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    1. Milan Panth & Samuel C. Hassler & Fulya Baysal-Gurel, 2020. "Methods for Management of Soilborne Diseases in Crop Production," Agriculture, MDPI, vol. 10(1), pages 1-21, January.
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