บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of pre- and postharvest treatments with calcium compounds on the incidence of postharvest fruit rots of mango.

Kaiser, S. A. K. M.; Dhua, R. S.; Banik, A. K.;

Journal of Mycopathological Research

2001

บทคัดย่อ

Effect of pre- and postharvest treatments with calcium compounds on the incidence of postharvest fruit rots of mango.

The effects of pre- and postharvest treatments with calcium nitrate and calcium chloride on the incidence of Colletotrichum gloeosporioides [Glomerella cingulata] and Diplodia natalensis [Botryosphaeria rhodina] causing postharvest rot of mango fruits was studied by artificial inoculation on the Gangetic plains of West Bengal, India. In vitro study showed that both calcium nitrate and calcium chloride at different doses have significantly reduced the linear growth of C. gloeosporioides and D. natalensis, but calcium chloride was better than calcium nitrate and maximum inhibition of growth of the two pathogens occurred at 10000 ppm of calcium. Preharvest treatment showed that the percentage of fruit rot due to the two pathogens was lowest after 9 days of storage when calcium nitrate and calcium chloride were sprayed thrice at 10 000 ppm and 5000 ppm ofcalcium, respectively, but calcium chloride was more effective than calcium nitrate at a common dose of   5000 ppm of calcium irrespective of the number of spray used. Postharvest treatment by vacuum infiltration also showed that the two test chemicals significantly reduced the fruit rot incidence after  9 days of storage, but calcium chloride was better than calcium nitrate and both the chemicals were most effective at 5000 ppm of calcium.