Positive effects in the control of yam sprouting with hot water dips after maleic hydrazide treatment

Postharvest, postcosecha, poscosecha, ?ame, Dioscorea alata L., tuber sprouting, hot water dip, physiological changes The effects of postharvest hot water dip (HWD) alone or in combination with preharvest maleic hydrazide (MH) spray on tuber sprouting in purple yam cultivar Kinampay were investigated. Freshly harvested tubers were obtained from plants sprayed or unsprayed with MH (3.3 kg active ingredient/hectare) one month before harvest and then subjected to dipping in either 50-55?C water or potable water for 20 min before storage or after one month storage at ambient (23-31?C, 65-92% RH). Both HWD treatments promoted tuber sprouting during 5-month storage. However, when combined with MH treatment, they enhanced the inhibitory effect of MH on tuber sprouting. Weight loss correlated with sprouting of tubers. Respiration and ethylene production rates also compared well with sprouting incidence except that the rates were higher in tubers HWD treated before storage than that treated after one month storage. HWD-treated tubers had markedly increased ?-amylase activity. SourcesDoroy, F.S. and Acedo Jr., A.L. 2013. YAM TUBER SPROUTING IN RESPONSE TO POSTHARVEST HEAT TREATMENT COMBINED WITH PREHARVEST MALEIC HYDRAZIDE SPRAY. Acta Hort. (ISHS) 989: 353-356Acta Horticulturae 989, Southeast Asia Symposium on Quality Management in Postharvest Systems and Asia Pacific Symposium on Postharvest Quality Management of Root and Tuber Crops The picture is by marketmanila.com ? ?