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Relationship of calcium nutrition to internal brown spot of potato tubers and sub-apical necrosis of sprouts
- Source :
- American Journal of Potato Research; February 1986, Vol. 63 Issue: 2 p87-97, 11p
- Publication Year :
- 1986
-
Abstract
- Potato tubers from field plots of calcium experiments in 1983 and 1984 were examined for the presence of internal brown spot. Presence of sub-apical necrosis on sprouts was also determined after storage in both years. Peel calcium concentration of 1983 tubers ranged from 0.226% to 0.130%; the range in percentage of these tubers with internal brown spot after 7 months storage was from 5.0% to 42.5%. The incidence of internal brown spot as well as sub-apical necrosis of sprouts was negatively correlated with tuber peel calcium levels (r = −0.754 and r = −0.792, respectively). Peel calcium concentration of 1984 tubers ranged from 0.224% to 0.104%; as in 1983, tuber calcium concentration was negatively correlated with the incidence of internal brown spot and sub-apical necrosis. Sub-apical necrosis of sprouts was present on 86.3% of the 1984 tubers with internal brown spot, and 65.3% of tubers with sub-apical necrosis on sprouts showed internal brown spot symptoms. The presence of sub-apical necrosis on tuber sprouts may serve as an indirect indicator of low calcium concentration in tubers.
Details
- Language :
- English
- ISSN :
- 1099209x and 18749380
- Volume :
- 63
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- American Journal of Potato Research
- Publication Type :
- Periodical
- Accession number :
- ejs13859357
- Full Text :
- https://doi.org/10.1007/BF02853687