Abstract
The effect of different durations of the incubation wetting period on the infection of Dendrobium flowers by two serious pathogens—Alternaria alternata (Fr.) Keissl. 1912 and Curvularia eragrostidis (Henn.) J.A. Mey. 1959—was investigated. Cut orchid flowers of the genus Dendrobium were used for the inoculation. The courses of symptom development and mycelium growth were determined. The results indicate that the infection and the subsequent development of disease on the flowers occur rapidly even if the conditions favourable for pathogen germination on the plant tissues persist for only 2 h. However, the proportion of infected flowers was significantly higher after a longer incubation period (6 h). The mycelium growth of the pathogen was also significantly influenced by the length of the incubation period.
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