Int. J. Agron. Agri. Res.2(2), 1-7, February 2012
The nutritive value and the mycoflora of sundried cocoyam chips were investigated during six months storage. Seven fungi namely Aspergillus flavus, Aspergillus niger, Aspergillus glaucus, Absidia corymbifera, Mucor spp., Rhizopus spp., Candida spp were isolated during the study. The fungal count was found to increase as the storagetime increased. The result of the proximate analysis (in %) showed that crude protein increased from 9.32 in freshly prepared samples to 11.36 in sundried samples stored for twenty four weeks. Also, carbohydrate content increased from 68.32 in freshly prepared samples to 69.52 in stored samples. Ash content increased from 3.55 to 4.20. Fat content decreased from 1.76 to 1.40 and the moisture content also decreased from 14.07 to 12.47 within the six months of storage. The result of mineral analysis (in mg/100g) showed that magnesium increased from 13.86 to 19.43, sodium increased from 15.53 to 16.55 but calcium was decreased from 23.50 to 23.21, zinc from 0.73 to 0.68 and phosphorus from 38.55 to 33.85. Copper, manganese and lead were not detected. This study has revealed the increase in the nutritional value and proximate analysis of sun dried cocoyam chips.
A.O.A.C 2005. Official Method of Analysis. 14TH Ed. Association of official Analytical Chemist, Washington. DC.
Abaka – Gyenin AK. Norman JC. 2000. The effect of storage on fruit quality of watermelons (Citrullus vulgaris Schad) ISHS. Acta Horticulturae 53, IV Africa symposium on Horticultural crops.
Abiodun OS. Olumide PO. 2007. Thermal control of some post harvest rot pathogen of Irish potato. Journal of Agric Sci. 52(1), 17 – 31.
Aderiye BI. 2004. Contributory roles of microbes to human development. 10th Inaugural lecture, University of Ado Ekiti, Nigeria. 11 – 36.
Aderolu AZ, Sogbesan OA. 2010. Evaluation and potential of cocoyam as carbohydrate source in catfish. African Journal of Agriculture Research 5(6), 453- 457.
Alexopoulous CJ. 1996. Introductory Mycology. 2nd Edition, John Wiley and Sons, incorporation, New York, USA. 278.
Alinnor IJ, Akalezi CO. 2010. Proximate and mineral composition of Discorea rotundata (White yam) and Colocasia esculentus (white cocoyam). Pakistan Journal of Nutrition. 9(10), 998 – 1001.
Amusa NA, Kehinde IA, Ashaye OA. 2002. Biodeterioration of the Africa Star Apple (Artocarpus communis) in storage and it’s effect on the nutrient composition. Afr. J. of Biotechnol. 2, 57 – 60.
Amusa NA. 2001. Fungi associated with yam chips in storage and the effects on the chip nutrient composition. Moor J. Agric. Res. 2, 35-39.
Arotupin DJ, Akinyosoye FA. 2001. Microflora of sawdust. Nigerian J. of Microbiology 15, 97 – 100.
Burell NJ. 1974. Chilling in storage of cereal, grain and their products. C. M. Christensen (Editor) American Association of cereal chemists. Inc., St. Paul MN.
Burnett JH. 1975. Mycogenetics. John Wiley and Sons: London, England. 375.
Crowley N, Bradley JM, Darrell JH. 1969. Practical Bateriology. Butterworth and Co., Ltd. London, 1969, 164 – 168.
Dugan FM. 2006. The idenfication of fungi: An illustrated introduction within Keys, Glossary, and Guide literature. American Phytopathological Society: St. Paul. Mn. 176.
Echendu AO, Obizoba IC, Ngwu EK, Anyika JU. 2009. Chemical composition of groundbean based cocoyam, yam and plantain pottage dishes and roasted groundbean. Pakistan Journal of Nutrition 8(11), 1786 – 1790.
Ekundayo CA, Idzi E. 2005. Mycoflora and nutritional value of shelled melon seeds (Citrullus vulgaris schrad) in Nigeria. J. for Plant Foods for Human Nutrition. 40, 31 – 40.
Fagbohun ED, Abegunde OK, David OM. 2010. Nutritional and mycoflora changes during storage of plantain chips and the health implications. J. of Agric. Biotechnol. and Sustain. Dev. 2(4), 61 – 65.
Fagbohun ED, Lawal OU. 2011. Effect of storage on nutrient composition and mycoflora of sundried soyabean. Afri. J. of Food Sci. 5(8), 473 – 477.
Koukou MDJE, Soumaila D, Simplice TG, Lucien PK. 2010. Effects of post harvest on some biochemical parameters on different parts of two yam species (Dioscorea spp.). African Journal of Food Science and Technology. 1(1), 1 – 9.
Ogundana SK, Naqui SHZ, Ekundayo JA. 1990. Fungi Associated with soft rot of yams (Dioscorea spp) in storage in Nigeria. Trans. Br. Mycol. Soc. 54(3), 445 – 451.
Okungbowa FI, Osagie M. 2009. Mycoflora of sundried sweet potato (Ipomoea batatas L.) slices in Benin city, Nigeria. African Journal of Biotechnology. 8(14), 3326 – 3331.
Onopikse OU, Wutoh JG, Ndazana X, Tambong JT, Mekoba MM, Sama AE, Nyochembeng S, Wilson JG, Burns M. 1999. Evaluation of Macabo cocoyam germplasm in Cameroon. J. Janick (Ed). In: Perspective on new crops and new uses. ASHS Press, Alexandria, V. A. 339 – 396.
Pearson J. 2002. Texas cooperative extension of the Texas A and M University system.
Raemaekers R. 2001. Crop production in Tropical Africa, Directorate general for international cooperation, Belgium, 1539.
Rice RG, Graham DM, Lowe MT. 2002. Recent ozone application in food processing and sanitation. Food Safety Magazine. 8(5), 10 – 17.
Richard JL, Wallace HA. 2001. Mycotoxins, National center for Agricultural utilization research, USDA/ARS.
Sandifola VS. 2002. Estimation of crop losses due to different causes in root and tuber crops, the case of Malawi. In: Proceedings of the expert consultation on root crop statistics. Harare, Zimbabwe, 3 – 6.
Tambong JT, Ndzana WJG, Dadson R. 1997. Variability and germplasm loss in Cameroon. National collection of cocoyam (Xanthosoma sagottifolium L scott), Plants Genetics Resources Newsletter. 112, 49 – 54.
Techtron V. 1975. Basic atomic absorption spectroscopy: A modern introduction. Domican Press, Victoria, Australia. 104 – 106.
Torres, GSL, Arias O, Thorpe, T. 1994. Micropropagation and field performance of virus free white cocoyam (Xanthosoma sagittifolium L schott) in Costa rica. In: Carribbean Food Society, 30th Annual Meeting, St. Thomas, USA, 137 – 145.
Tuite J. 1961. Fungi isolated from unstored corn seed in Indiana in 1956- 1958. Plants Dis. Rep. 45, 212 – 215.