This study was conducted to determine the effect of ethephon on the sprouting behavior of VU-2 yam tubers and to establish the most effective concentration and time of application of ethephon for early sprouting of yam tubers. The ethephon concentration of 500 mg/L was more effective when applied at one month after harvest (OMAH) in promoting early and high percentage and long sprouts while the delayed application (i.e., two months after harvest) resulted to delayed sprouting, low sprouting incidence, and production of short sprouts. Also, tubers applied with 500 mg/L ethephon immediately after harvest (IAH) reached 50% sprouting the earliest. The degree of sprouting, shriveling, and decay incidence was not significantly affected by the different concentration and time of application of ethephon.
CABI. 2013. Dioscorea alata L. (Water yam). cab.org. Copyright 2017. CABI is a registered EU trademark.
Craufurd, P.Q., et al. (2001). Dormancy in yam. Expl. Agric. 37:147-181.
Degras, L. (1993). The Yam. A Tropical Root Crop. London: Macmillan.
Girardin, O.C., et al. (1998). Use of Gibberellic acid to prolong Dormancy and reduce losses during traditional storage of yam. J. Sci. Food Agric. 77: 172- 178.
Hahn, S.K. (1995). Yams: Dioscorea Spp. (Dioscoreaceae). In: Smartt J, Simmonds NW, eds. Evolution of crop plants. London: Longman Scientific and Technical, UK, 112–120.
Hamadina, E.I. (2011). The control of yam tuber dormancy: a framework for manipulation. IITA, Ibadan, Nigeria. 60 pp.
Hariprakash, C.S. and B. Nambisan. (1996). Carbohydrate metabolism during dormancy and sprouting in yam (Dioscorea) tubers: Changes in the carbohydrate constituent in yam tubers during dormancy and sprouting. J. Agric. Food Chem. 44:3066-3069.
Higdon, K, et al. (2001).The use of estrogen, DHEA, and diosgenin in a sustained delivery setting as a novel treatment approach for osteoporosis in the ovariectomized adult rat model. Biomed Sci Instrum.37:281-286.
Ile, E.I., et al. (2006). Phases of Dormancy in Yam Tubers (Dioscorea rotundata). Annals of Botany. 97: 497–504.
Ile, E.I. (2004). Control of tuber dormancy and flowering in yam (Dioscorea rotundata Poir.) tuber. PhD thesis, The University of Reading, Reading, UK.
Manu, F.D.W., I. Oduro, W. O. Ellis, R. Asiedu and B. Maziya-Dixon. (2013).Food Quality Changes in Water Yam (Dioscorea Alata) During Growth and Storage. Asian Journal of Agriculture and Food Sciences (ISSN: 2321 – 1571) Volume 01– Issue 03.
Muzac-Tucker I, Asemota HN, Ahmad MH (1993). Biochemical composition and storage of Jamaica Yams (Dioscorea spp.). J. Sci. Food. Agric. 62:219-224.
Nyadanu, D., H. Dapaah and A.D. Agyekum. (2014). Resistance to Post-harvest microbial rot in yam: Integration of genotype and storage methods. African Crop Science Journal, 22 (2): 89 - 95. ISSN 1021-9730/2014.
Offei, S.K., J. Ofosu-anim, J. Teiko, and S. Yamaki. (2006). Induction of Multiple Tuberization in Yam (Dioscorea spp.) using Ethephon. Int. J. Agri. Biol. 8(1): 73-75.
Udensi, EA, Oselebe, H.O, Onuoha. A.U. (2010). Antinutritional Assessment of D. alata varieties. Pak. J. Nutr. 9(2):179-181.
Okwuowulu, P.A., E.C. Nnodu, U.A Udensi, and M.U.A. Opara. (1995). Some effects of time of fertilizer application and age at harvest on the storability of edible yams. Trop. Sci. 35:58-63.
Orkwor, G. C. and I.J. Ekanayake. (1998). Growth and development. In: Food Yams: Advances in Research, p. 39-62 (Eds G. C. Orkwor, R. Asiedu and I. J. Ekanayake). Ibadan: IITA/NRCRI.
Osunde, Z. D. and B. A. Orhevba. (2011).Effects of storage conditions and pre-storage treatment on sprouting and weight loss of stored yam tubers. Journal of Stored Products and Postharvest Research. 2: 29 – 36.
Osunde, Z.D, and B.A. Orhevba. (2009). African Journal of Food, Agriculture, Nutrition and Development, 9: 678–690.
Osunde, Z.D. (2008). Minimizing Postharvest Losses in Yam (Dioscorea spp.): Treatments and Techniques. Chapter 12 from Using Food Science and Technology to Improve Nutrition and Promote National Development, Robertson, G.L. & Lupien, J.R. (Eds), © International Union of Food Science & Technology.
Passam, H. C. (1982). Dormancy of yams in relation to storage. In: Yams -Ignames, p 285-293 (Eds J. Miege and N. Lyonga). Oxford: OUP.
Paul, V, and R.Ezekiel. (2003). Early initiation of little tubers on physiologically old potato (Solanum tuberosum L.) tubers during storage: effect of triadimefon. J Plant Biol. 30(1):65–70.
Prange, R.K., B.J. Daniels-Lake and K. Pruski, (2005). Effects of continuous ethylene treatment on potato tubers: Highlights of 14 years of research. Acta Hort. (ISHS) 684:165- 170.
Raphael, O.N, E.C. Ebere, A.C. Kingsley, I.R. Chidiebere, O.B. Chidi, A.S. Nsikak, A. C. Gladys, O.I. Onyedika, E.C. Uche and I.A.Confidence. (2015). Control of white yam (Dioscorea rotundata) rot pathogen using peel extract of water yam (Dioscorea alata). Advances in Applied Science Research. 6(10):7-13.
Rylski, I., C. Rapport, and H.K. Pratt. (1974). Dual effects of ethylene on potato dormancy and sprout growth. Plant Physiol. 53: 658-662.
Sahore DA, G.J. Nemlin, and A. Kamenan. (2007). Changes in nutritional properties of yam (Dioscorea spp), green plantain (Musa spp) and cassava (Manihot esculenta) during storage. Food Sci. Technol. 47: 81–88.
Sisler, E.C., and Margrethe Serek, (1999). Compounds controlling the ethylene receptor. Bot. Bull. Acad. Sin. 40: 1-7.
Tortoe, C., S. Dowuona, and N. T. Dziedzoave. (2015). "Determination of Sprout Control Treatment Using Seven Key Yam (Dioscorea spp.) Varieties of Farmers in Ghana." World Journal of Agricultural Research 3.1: 20-23.
Wills, R.B.H., and M.A. Warton, (2003). Effect of low levels of ethylene on sprouting of potatoes in storage. HortScience 39 (1): 136-137.
The copyright holder is the Innovative Technology and Management Journal, Eastern Visayas State University, Tacloban City, Philippines.