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THE EFFECT OF REMOVAL OF THE INNER CORTEX OF SEED YAMS OF TWO YAM (Dioscorea sp.) CULTIVARS ON VINE GROWTH AND YIELD OF WARE YAMS


NDUBISI IGWILO

Abstract

The inner cortex of two yam cultivars – Obiaoturugo (Dioscorea rotundata Poir) and Um680 (D.alata L.) were extruded, leaving a 1cm wall with the periderm. The two sett types (hollow and intact) in both cultivars, gave similar fresh tuber yields. Growth attributes of the yam vines were also fairly similar. It is suggested that the 1cm outer layer of ware tubers, usually thrown away, can be re-cycled the following cropping season to raise ware tubers.



[Niger Agric. J. 34 (2003): 68-73]

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print ISSN: 0300-368X