Abstract
Resistance to tuber rot by #Botryodiplodia theobromae in relation to
tuber phenol and proximate content was investigated in this study in
variety Agbodo of #Dioscorea alata and varieties #Oniyere, Iseosi and Abuja of #D. rotundata.
The four varieties harvested from a field plot where they had been
fertilized with an 8-mineral content fertilizer (Bounty), were incubated
with B. theobromae for 4 weeks along with their counterpart (the
same four varieties) sourced from farmers’ plots. The experiment was a
4x3 factorial, with 4 main factor treatments (variety), 3 subfactor
treatments of 0.6ml l-1 and 1.2ml l-1 Bounty fertilizer, and #farmers’ plot tuber (FPT). There were 3 replications. Only the fertilized tubers
were analyzed for phenol and mineral content in a 4 by 2 factorial
experiment, as resistance to tuber infection by #B. theobromae had correlated significantly with phenol and mineral uptake in white guinea yam (unpublished).
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