Potential postharvest botanical extract on bacterial soft rot of cabbage (Brassica oleracea var. capitata L.)

M. Benitez, J.K.M. Benitez
Bacterial soft rot is the most serious postharvest problem of cabbages. This study was conducted to determine the antimicrobial effect of selected botanical extracts on bacterial soft rot of cabbage and to identify promising botanical treatments against cabbage soft rot. Two known medicinal plant species were evaluated, namely; Chinese malunggay (Sauropus androgynous) and alkaline herb (Gynura procumbens) used at 1:1 dilution were tested, with water, alum and lime paste as control treatments. After treatment, the cabbages were inoculated with crude bacterial soft rot inoculums. The cabbages were then incubated under humidified chambers and evaluated for soft rot infection. Bacterial soft rot infection was remarkably inhibited by 1:1 leaf extract of Alkaline herb (Gynura procumbens); decreased to less than 5% and had comparable antibacterial effect to that of alum and lime paste. Chinese malunggay at 1:1 dilution (extract:water) were ineffective in controlling bacterial soft rot than in alkaline herb. The magnitude of soft rot infection of cabbage treated with Chinese malunggay at 1:1 dilution (extract:water) was still remarkably much reduced than that of the water control which had all the cabbages being lost after 11 days of ambient storage. Alkaline herb (Gynura procumbens) extract treatment was able to save cabbages for sale or consumption and can be tested in larger scale and establish commercial viability and solid recommendation for the industry.
Benitez, M. and Benitez, J.K.M. (2018). Potential postharvest botanical extract on bacterial soft rot of cabbage (Brassica oleracea var. capitata L.). Acta Hortic. 1213, 619-624
DOI: 10.17660/ActaHortic.2018.1213.94
https://doi.org/10.17660/ActaHortic.2018.1213.94
Brassica oleracea var. capitata L., Sauropus androgynous, Gynura procumbens postharvest, botanical extract, bacterial soft rot
English

Acta Horticulturae