Journal on Medical Genetics - BJSTR Journal

Abstract

Three or more years fallow may not replenish enough for optimum quality of #Dioscorea (food cultivars) tubers. This study indicated this because Calcium and Nitrogen of values 0.47cmol kg^-1 and 0.2% respectively were still below the critical determined for #optimum yam production (South West Nigeria) even after three years fallow followed by two consecutive years of calcium nitrate fertilization to Dioscorea on the field plot used in this study. The experiment was a 3 by 3 factorial, arranged in RCBD and 3 replicates. #Ca (NO₃)₂ soil amendment at 0, 1, 2kg ha^-1 of calcium was the main plot treatment applied at 3 MAP (months after planting) and one foliar spray only at the rates 0, 100 and 500mg l^-1 Ca (NO₃)₂ applied at 5 MAP. Ca (NO₃)₂ soil amendment (1 and 2kg ha^-1) and 100mg l^-1 Ca (NO₃)₂ foliar spray all promoted more #leaf phytoanticipins namely flavonoid, lignin and tannin over the control.

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Calcium Nitrate Fertilizer Effect on Anthracnose Disease Caused by Colletotrichum gloeosporioides penz. and Tuber Rot by Botryodiplodia theobromae pat. in Dioscorea Alata Variety Alakisa by Otusanya MO in BJSTR