TY - JOUR
T1 - The effects of duration of development and drying regime on the longevity of conidia of Metarhizium flavoviride
AU - Hong, T. D.
AU - Jenkins, N. E.
AU - Ellis, R. H.
N1 - Funding Information:
This research is part of the collaborative Lutte Biologique Contre les Locustes et Sauteriaux (LUBILOSA) programme between the International Institute of Biological Control (IIBC), the Biological Control Programme Centre of the International Institute of Tropical Agriculture (IITA), Cotonou, Benin, and Comite! Inter-E! tats pour la Lutte contre la Se! cheresse dans le Sahel (CILSS), Niamey, Niger, funded by the Canadian International Development Agency, the Netherlands Directorate General for International Cooperation, The UK Overseas Development Administration, and the Swiss Development Cooperation. We thank Dr D. Moore for his many helpful comments and Ms J. Gunn for technical assistance.
PY - 2000/6
Y1 - 2000/6
N2 - Conidia of the entomopathogenic Metarhizium flavoviride were harvested 8, 10, 12 or 15 d after inoculation at 25 °C and then (as conidiated rice) dried rapidly (10-12% r.h. and 17-20°for 17 h to about 15-22% moisture content) or slowly (50-60% r.h. and 27°for 5 d to about 27-32% moisture content initially). The subsequent survival of these conidia in air-dry storage at 50°with 8·1% moisture content was then assessed. Conidia longevity (assessed by the duration of storage until conidia viability was reduced to 50%, p50) was maximal when conidia were harvested 10 d after inoculation, and was much greater following slow rather than rapid drying. The substantial beneficial effect of slow desiccation to subsequent conidia survival is consistent with that detected in other propagules in anhydrous biology, and is also of considerable practical utility for the biological control of insects by entomopathogenic fungi.
AB - Conidia of the entomopathogenic Metarhizium flavoviride were harvested 8, 10, 12 or 15 d after inoculation at 25 °C and then (as conidiated rice) dried rapidly (10-12% r.h. and 17-20°for 17 h to about 15-22% moisture content) or slowly (50-60% r.h. and 27°for 5 d to about 27-32% moisture content initially). The subsequent survival of these conidia in air-dry storage at 50°with 8·1% moisture content was then assessed. Conidia longevity (assessed by the duration of storage until conidia viability was reduced to 50%, p50) was maximal when conidia were harvested 10 d after inoculation, and was much greater following slow rather than rapid drying. The substantial beneficial effect of slow desiccation to subsequent conidia survival is consistent with that detected in other propagules in anhydrous biology, and is also of considerable practical utility for the biological control of insects by entomopathogenic fungi.
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U2 - 10.1017/S0953756299001872
DO - 10.1017/S0953756299001872
M3 - Article
AN - SCOPUS:0033933691
SN - 0953-7562
VL - 104
SP - 662
EP - 665
JO - Mycological Research
JF - Mycological Research
IS - 6
ER -