Influence of moisture content on temperature tolerance and storage of Metarhizium flavoviride conidia in an oil formulation
1995
Hedgecock, S. | Moore, D. | Higgins, P.M. | Prior, C.
Investigations of the temperature tolerances of Metarhizium flavoviride conidia, of different moisture contents, in an oil formulation were carried out. The conidia were dried to 5, 9, 15 or 19% moisture contents and exposed to a range of temperatures, -15, 12, 25, 38, 48 and 55 degrees C. Viability declined due to high temperatures and high moisture contents. After 4 months of storage, the conidia were at over 80% viability in all but the 19% moisture content group of the 25 degrees C treatment and all the samples stored at lower temperatures. In a second experiment, conidia dried to 4-5% moisture content showed greater temperature tolerance than conidia with higher moisture contents. Short-term storage under adverse condition could be feasible with conidia dried to a suitable degree.
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