[Factors affecting conidia germination of the fungus Spilocaea oleaginea the causal agent of olive peacock]
1991
Kashy, A.H. (Sutaif Univ. (Algeria). Biological College) | Waleed, A.L. | Lewik, J.
The study showed that the viability of the conidial spores was high under field conditions in the spring and late fall and low during summer. Viability of newly formed conidia was low. The conidia germinated equally well in tap and distilled water, and germinability was enhanced by the presence of nutritional elements. Conidia germinated at temperatures of 1 to 28 deg C., with optimal response at 20 deg C. Viability was reduced at higher temperatures, and temperature effect was increased by increasing exposure period. Germination was optimal at 100 relative humidity (RH) and was reduced at 95 RH. Conidial spores germinated at pH values of 4-12 with optimal germination at pH 8-10. Exposure to ultraviolet light was germicidal to the conidial spores, whereas sun light reduced the viability of such spores. Conidial spores collected in the spring lost their viability after 5 months of storage in the laboratory. When stored at 75-90 and 32-50 RH, conidial spores lost their viability in four and ten months, respectively.
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