Soft rot of cabbage is caused by the bacterium Pectobacterium carotovorum, previously called Erwinia carotovora. It is a major problem during wet weather and can be more severe when plants lack sufficient calcium. The pathogen is generally spread by irrigation water, rain, several species of maggot flies and other insects. Disease development is usually favoured by warm temperatures of 25 to 30°C, humid conditions or following periods of wet weather that lead to free moisture on plant tissues. Symptoms: 1. Cause the formation of water-soaked spots. These spots enlarge over time and become sunken and soft. 2. Interior tissues beneath the spots become mushy and discoloured, with the discoloration ranging anywhere from cream to black. 3. Seepage from affected areas. 4. In severe cases of infection, leaves, stems and roots may decay entirely. 5. A strong disagreeable odour from the rotten tissues. 6. Breakdown of plant tissues. Disease Management:
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