Effects of Temperature on Germination of Peronospora parasitica Conidia and Infection of Brassica oleracea

The effect of temperature on germination of a South African isolate of Peronospora parasitica, and infection of Brassica oleracea was studied. The optimum condition for germination was 20° C at 100% relative humidity. The percentage germination obtained was 80–98% and 70–80% between 15 and 25° C at...

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Bibliographic Details
Published in:Journal of phytopathology 1998-04, Vol.146 (2-3), p.137-141
Main Author: Achar, P. N.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Brassica oleracea
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
Growth, nutrition, metabolism, transports, enzymes. Molecular biology
Microbiology
Mycology
Pathology, epidemiology, host-fungus relationships. Damages, economic importance
Peronospora parasitica
Phytopathology. Animal pests. Plant and forest protection
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Summary:The effect of temperature on germination of a South African isolate of Peronospora parasitica, and infection of Brassica oleracea was studied. The optimum condition for germination was 20° C at 100% relative humidity. The percentage germination obtained was 80–98% and 70–80% between 15 and 25° C at 100% relative humidity, after a 12 and 6h incubation period, respectively. Optimum temperature for germ tube growth was also 20° C. The temperature range for maximum infection of seedlings of a highly susceptible cabbage cultivar and subsequent disease development in vitro was 15–25° C and 90–100% infection was achieved after 48 h of incubation. At
ISSN:0931-1785
1439-0434
DOI:10.1111/j.1439-0434.1998.tb04670.x