Journal Article

Inactivation of <i>Paecilomyces fumosoroseus</i> conidia by diffuse and total solar radiation

Nathalie Smits, Marc Rougier, Jacques Fargues, Robert Goujet and Raymond Bonhomme

in FEMS Microbiology Ecology

Volume 21, issue 3, pages 167-173
Published in print November 1996 |
Published online January 2006 | e-ISSN: 1574-6941 | DOI:

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The detrimental photic effects of natural solar radiation on the conidial persistence of the entomopathogenic hyphomycete Paecilomyces fumosoroseus were investigated by exposing quiescent conidia either to total solar radiation or to its diffuse component. A given amount of UVB diffuse radiation was found to be as detrimental, and sometimes twice as detrimental, as the same amount of total solar radiation. The variability in quantity and spectral distribution of the diffuse component of UVB solar radiation reaching the earth's surface, observed through spectral measurements, may be responsible for the difference in biological effects.

Keywords: Paecilomyces fumosoroseus; Conidial persistence; UVB solar radiation; Diffuse radiation; Biological control

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