Journal
PLANT AND SOIL
Volume 382, Issue 1-2, Pages 281-289Publisher
SPRINGER
DOI: 10.1007/s11104-014-2157-y
Keywords
Biofumigation; Isothiocyanates; Rhizoctonia solani; Colletotrichum coccodes; Helminthosporium solani; Black scurf; Black dot; Silver scurf; Fungal potato pathogens; Brassicas
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Funding
- John Oldacre Foundation
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This study aimed to examine the effects of seven different isothiocyanates against the growth and development of three important soil borne potato pathogens, (Colletotrichum coccodes, Rhizoctonia solani and Helminthosporium solani). The study was carried out using an agar diffusion assay. The radial growth of fungal pathogens grown on agar containing different ITCs at a range of concentrations was compared to that of growth on control agar plates that did not contain ITCs. Results varied depending on the specific isothiocyanate incorporated into the agar. They ranged from those which showed a significant effect on fungal growth to those which appeared to have little or no effect. Where a suppressive effect was observed, due to the presence of the isothiocyanate, fungal colony growth decreased as the concentration of the incorporated isothiocyanate increased. Results from this study indicate that fungal growth can be inhibited by exposure to ITCs. However the results observed are specific to the ITC structure and exposure concentration.
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