Abstract
Abstract Raised bed culture and different population densities were studied to determine their effect on bacterial soft rot (Erwinia carotovora ssp. carotovora) during summer production of Chinese cabbage (Brassica campestris L. Group pekinensis). Seeds were sown on different dates to determine the relationship between head formation and the occurrence of soft rot. Tropical (heat-tolerant) cultivars were evaluated for summer production potential in raised-bed and flat-culture systems. Raised beds were, in some instances, beneficial in reducing the incidence and progression of soft rot. Phyllosphere air temperatures on raised beds were slightly lower than on flat culture; however, the effect on reducing soft rot incidence is unclear. Plants grown at 30-cm within-row spacing produced fewer marketable heads than plants at 46, 61, or 76 cm. Plants from seed sown after mid June had a significantly higher incidence of soft rot when compared to earlier planting dates.
Published Version
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