Journal of Food, Agriculture and Environment

Vol 7, Issue 2,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Preliminary investigations into the effect of uniconazole-P and prohexadione calcium on sprouting and shoot length of Dioscorea rotundataD. alata and D. cayenensis in Ghana


E. Otoo 1*, H. Shiwachi 2, M. Onjo 3

Recieved Date: 2008-12-02, Accepted Date: 2009-04-20


Three yam species (Dioscorea rotundataD. alata and D. cayenensis) were used in three separate studies to investigate the effect of gibberellin- inhibitors uniconazole-P (UP) and prohexadione-Ca (PC) on sprouting and initial growth of yams. A 3 x 2 factorial experiment involving 2 factors with 3 levels of chemicals (250 g/l of uniconazole-P (UP), prohexadione-Ca (PC) and water) and two varieties of yams was used in each study which was conducted at Crops Research Institute of Ghana’s on-station facility at Fumesua in 2007. The varieties of Dioscorea rotundata were Mankrong Pona and CRI Kukrupa. Matches and Akaba were the two varieties of D. alata, and TDc_01/018 and TDc_01/023 were the two D. cayenensis varieties. The experimental design was RCBD with 3 replications. There were 10 tubers/treatment/variety/rep. Variable varietal response was observed. UP and PC suppressed sprouting and shoot development in D. alata and D. rotundata with greater suppression of sprouting by PC. There seemed to be an association between non-sprouting and rottening of treated tubers. However, no significant UP and PC effects were observed on sprouting, rottening and mean shoot height of D. cayenensis. Shoot development in D. rotundata and D. alata was suppressed by chemical treatment.


Dioscorea species, prohexadione calcium, uniconazole-P

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 481-486

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