Project Type: Graduate Student
Funds awarded in 2016: $11,000.00
Projected End Date: 08/31/2018
Grant Recipient: Tennessee State University
Baysal-Gurel, F., and Liyanapathiranage, P. 2018. Sustainable Management of Soil-borne Diseases in Nursery Production. Our Farms, Our Future Conference. Apr 3-5, 2018. St. Louis, Missouri (Poster presentation- SSARE travel award). Abstract Soil-borne diseases reduce plant performance, increase costs to the grower and cause potential ecological damage to the natural environment. The use of Brassicaceae cover crops have not been widely explored and documented in woody ornamental nursery production. The objective of this study was to assess Brassicaceae cover crops as biofumigant for soil-borne disease management in nursery production. Among the tested fifteen cover crops in the Brassicaceae family, oilseed radish (Raphanus sativus), mustard (Sinapis alba), purple top forage turnip (Brassica rapa), astro arugula (Eruca vesicaria), mighty mustard® pacific gold (B. juncea), oriental mustard (B. juncea), dwarf essex rape Brassica (B. napus) and amara mustard green (B. carinata) showed low root rot disease percentages in top soil which had pre-existing populations of Rhizoctonia solani or Phytophthora nicotinanae. These selected cover crops were used to perform biofumigation in a greenhouse study; hydrangea and viburnum plants grown in amara mustard, astro arugula and purple top forage turnips incorporated soils resulted less Phytophthora and Rhizoctonia root rot. Similar disease suppression was observed when biofumigation was performed for 14- or 30-days. A field study was conducted at a collaborator’s nursery with prevalent R. solani pressure. Flowering cherry cuttings were planted two weeks after incorporation of amara mustard, astro arugula and purple top forage turnips biofumigants, mustard meal, compost and plants were evaluated for disease severity on roots. Amara mustard, astro arugula and purple top forage turnips biofumigant cover crops showed promising results in controlling soil-borne pathogens of woody ornamental plants under both greenhouse and field conditions.
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This product is associated with the project "Sustainable Management of Soil-borne Diseases in Nursery Production"