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| Titel: |
Water Activity and Other Factors that Affect the Viability of Colletotrichum truncatum Conidia in Wheat Flour-Kaolin Granules ('Pesta') |
| Auteur: |
Connick, W. J. Daigle, D. J. Boyette, C. D. Williams, K. S. Vinyard, B. T. Quimby, P. C. |
| Verschenen in: |
Biocontrol science and technology |
| Paginering: | Jaargang 6 (1996) nr. 2 pagina's 277-284 |
| Jaar: |
1996-06-01 |
| Inhoud: |
Optimization of shelf-life is critically important for biocontrol products containing living microorganisms. Conidia of Colletotrichum truncatum, a fungal pathogen of the weed, hemp sesbania (Sesbania exaltata), were produced in shake flasks (corn meal-soya flour medium) and on Emerson Yp Ss agar and formulated in wheat flour-kaolin granules ('Pesta'). The granules were conditioned at water activities of 0, 0.12, 0.33, 0.53 and 0.75 during storage at 25 C over desiccant or saturated salt solutions. The longest shelf-life (conidial inoculum viability) was found in samples in the water activity range 0-0.33, where the water was bound by the matrix and not readily available to the fungus. At a water activity of 0.12, granules were 100% viable (on water agar) for at least 24 weeks, and were 87% viable after 1 year. Sucrose (5% w/w) partially counteracted the detrimental effect of high water activity on the shelf-life of C. truncatum when incorporated in the granules. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 13 van 13 gevonden artikelen
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