Showing papers by "Central Tuber Crops Research Institute published in 1996"
TL;DR: Several simple, low-cost traditional methods are being followed by farmers in different parts of the world to store different root and tuber crops in the fresh state, including refrigerated cold storage, freezing, chemical treatments, wax coating, and irradiation.
Abstract: The root tuber crops, including cassava, sweet potato, yams, and aroids, enjoy considerable importance as a vegetable, staple food, or raw material for small-scale industries at a global level, particularly in the less developed tropical countries. The perishability and postharvest loses of root and tuber crops are the major constraints in the utilization of these crops. Several simple, low-cost traditional methods are being followed by farmers in different parts of the world to store different root and tuber crops in the fresh state. An account of different storage practices and constraints is reviewed in this article. Some of these methods have been studied and evaluated by different research workers. Several modern techniques, including refrigerated cold storage, freezing, chemical treatments, wax coating, and irradiation, for storing fresh tropical tubers are also reviewed. The pre- and postharvest factors to be considered for postharvest storage of different root and tuber crops are incorporated into the review.
61 citations
TL;DR: Tropical root and tubers, including cassava, sweet potato, yams and aroids, have been reported to show an increase in respiratory activity after harvest and injury and subsequent storage in association with their deterioration, which leads to loss of water and carbohydrate.
Abstract: Tropical root and tubers, including cassava, sweet potato, yams and aroids, have been reported to show an increase in respiratory activity after harvest and injury and subsequent storage in association with their deterioration. This leads to loss of water and carbohydrate. Cassava roots often show discoloration of the tissue with development of pigments in the xylem vessels (vascular streaking or primary/physiological deterioration). This has been established to be enzymatic in nature. Pruning the cassava stem, leaving about a 20- to 30-cm stub prior to harvest, could delay the onset of primary deterioration. Sweet potato roots and yam tubers show a peak respiratory activity immediately or 1 d after harvest. The respiratory rate, however, declines during the subsequent storage period. Yam tubers show a further increase in respiratory activity at the breakage of dormancy occurring at the time of sprouting. Dormancy in yam tubers has been studied in some detail. Different species of yams vary in their dormancy period, a major factor that accounts for the variation in their storage life. Little information is available on the dormancy of sweet potato and aroids. Tropical roots and tubers exhibit "chilling injury" when stored at temperatures below a critical level. The critical cold-storage temperatures range between 10 and 15 degrees C for different tropical root and tuber crops.
43 citations
TL;DR: Chromatographic sugar analysis in tubers indicated the presence of glucose and sucrose in fresh tubers and fructose and maltose were detected during dormancy/sprouting periods.
Abstract: Changes in carbohydrate constituents were stuided in tubers of Dioscorea rotundata, Dioscorea alata, and Dioscorea esculenta during dormancy and sprouting for a period of 90 days. Decrease in starc...
39 citations
TL;DR: Although there was reduction in starch content due to insect infestation, starch quality did not change much in plain dried chips, indicating the possibility of using such infested chips in animal feed formulations and in the manufacture of commodity chemicals.
11 citations
TL;DR: In this article, the force deformation behavior of cassava tubers under axial compression loading was studied when fresh and after having been fermented for 18, 24 and 48 h. The results showed that the tubers were relatively hard and brittle, more so in the case of H-1687 when compared to H-2304.
10 citations
Journal Article•
TL;DR: A brief report on zoosporangia morphology and germination of P. colocasiae (the causal agent of leaf blight in Colocasia esculenta and C. antiquorum) is given.
Abstract: A brief report on zoosporangia morphology and germination of P. colocasiae (the causal agent of leaf blight in Colocasia esculenta and C. antiquorum) is given.
2 citations