Effect of Organic and Inorganic Salts on the Development of Helminthosporium solani, the Causal Agent of Potato Silver Scurf
| Autor: | V. Hervieux, Russell J. Tweddell, Joseph Arul, E. S. Yaganza |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Helminthosporium solani
Sodium formate food and beverages Plant Science Sodium metabisulfite Biology Chloride Horticulture chemistry.chemical_compound medicine.drug_formulation_ingredient Trisodium phosphate chemistry Sodium citrate Botany medicine Spore germination Sodium benzoate Agronomy and Crop Science medicine.drug |
| Zdroj: | Plant disease. 86(9) |
| ISSN: | 0191-2917 |
| Popis: | Potato silver scurf, caused by Helminthosporium solani, is an important postharvest disease of economic significance. Control of H. solani has been accomplished primarily by postharvest applications of thiabendazole. However, many strains of H. solani have become resistant to thiabendazole, resulting in failure of disease control. Consequently, alternative control strategies are needed. This study showed that several salts significantly reduced silver scurf development on potato tuber at a concentration of 0.2 M and that the timing of application also influenced salt efficacy. Among the 23 tested salts, aluminum chloride was the only one reducing silver scurf severity when applied either 2, 4, or 7 days after H. solani inoculation. Aluminum lactate, potassium sorbate, sodium carbonate, sodium metabisulfite, and trisodium phosphate also markedly reduced silver scurf severity but only when applied 2 or 4 days after inoculation. Ammonium acetate, calcium chloride, sodium benzoate, sodium citrate, and sodium formate reduced disease severity by at least 50% when applied 2 days after H. solani inoculation. With the exception of calcium chloride and sodium formate, these salts also were shown to strongly inhibit H. solani mycelial growth or spore germination in vitro. Results of this study further demonstrate the possibility of using selected salts for the control of potato silver scurf. |
| Databáze: | OpenAIRE |
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