Compost teas are extracts of fermented composted materials used for their ability to control plant diseases. A compost extractor in liquid phase, with a forced air-blowing system, assembled using farmer facilities, was used to produce “on farm” aerated compost teas (ACTs) from five types of compost, in a 14-day fermentation cycle. Solid feedstocks, representing one biowaste compost and four composted tomato or tomato plus escarole residues, were separately extracted in water (waACTs) and whey (whACTs). The ten teas were tested for their ability to inhibit, in vitro, growth of several soil-borne (Fusarium solani, Verticillium dahliae, F. oxysporum f. sp. lycopersici, Rhizoctonia solani, Sclerotinia minor and Sclerotium rolfsii) and air-borne (Alternaria radicina, A. dauci and Colletrichum lindemuthianum) fungal pathogens. All ACTs significantly inhibited the mycelial growth of A. dauci (46-58%), A. radicina (27-66%), F. solani (24-36%) and C. lindemuthianum (31-52%). The other pathogens were affected weakly. The main separation using principal component analysis of inhibition levels of the pathogens could be related to their telluric or aerial nature. Future prospective consists in testing the best ACTs as potential alternatives to the use of synthetic chemical fungicides for disease control in the field.

Impiego di reflui caseari per la produzione di tea-compost per il controllo di alcuni funghi fitopatogeni

CELANO, Giuseppe;
2012

Abstract

Compost teas are extracts of fermented composted materials used for their ability to control plant diseases. A compost extractor in liquid phase, with a forced air-blowing system, assembled using farmer facilities, was used to produce “on farm” aerated compost teas (ACTs) from five types of compost, in a 14-day fermentation cycle. Solid feedstocks, representing one biowaste compost and four composted tomato or tomato plus escarole residues, were separately extracted in water (waACTs) and whey (whACTs). The ten teas were tested for their ability to inhibit, in vitro, growth of several soil-borne (Fusarium solani, Verticillium dahliae, F. oxysporum f. sp. lycopersici, Rhizoctonia solani, Sclerotinia minor and Sclerotium rolfsii) and air-borne (Alternaria radicina, A. dauci and Colletrichum lindemuthianum) fungal pathogens. All ACTs significantly inhibited the mycelial growth of A. dauci (46-58%), A. radicina (27-66%), F. solani (24-36%) and C. lindemuthianum (31-52%). The other pathogens were affected weakly. The main separation using principal component analysis of inhibition levels of the pathogens could be related to their telluric or aerial nature. Future prospective consists in testing the best ACTs as potential alternatives to the use of synthetic chemical fungicides for disease control in the field.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/18200
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