Abstract

Factors influencing the occurrence of post-harvest diseases of tulip bulbs caused by Pseudomonas andropogonis and P. gladioli during the storage and distribution were examined. The disease occurrence of the bulbs was promoted by washing in running water or dipping in the insecticide for bulb mite. Thus, following to the increase of the dipping times to the insecticide, the population of P. gladioli in the bulbs increased and the disease increased. The pathogen populations in the bulbs decreased to remove the debris of the bulb scales and roots before washing. The disease development in the bulbs was influenced by several factors such as wounding, wetness, and temperature other than the pathogen density during storage.

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