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Efficacy of Calcium Carbide and leaves of Croton aromaticus and Averrhoa bilinbi in breaking dormancy of Oioscorea yams

Authors:

MNM Ibrahim ,

Coconut Research Institute, Lunuwila, LK
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M de S. Liyanage

Coconut Research Institute, Lunuwila, LK
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Abstract

The relative efficacy of CaC2 Kappetiya (Croton aromaticus) and bilin (Averrhoa bilinbi) leaves in breaking the dormancy of Dioscorea yams (Dioscorea data L.) was compared in two experiments. CaC2 treatment for 5 hours induced setts of var. Kahata angala to commence sprouting in 16.8 days, while a mixture of Kappetiya and bilin leaves applied for 4 days and only Kappetiya leaves for 5 days induced sprouting in 21.3 and 32.9 days, respectively. Moreover, the number of setts induced to sprout was 56% with all 3 materials when averaged over the 3 types of setts used. But Kapettiya and bilin leaves induced 85% sprouting in head setts as against 76.7% with CaC2. CaC2 on the otherhand induced a larger number of tail setts to sprout. With variety Kiri khondol application of kappetiya and bilin leaves for 3 days and only kappetiya for 5 days induced sprouting in 16.6 and 17.6 days respectively ; and the percentage sprouting was 48.5 and 58.7, respectively. Untreated setts of Kahata angala and Kiri khondol commenced sprouting only after a rest period exceeding 120 days. In both varieties, and in all treatments, head and middle setts sprouted earlier and gave a higher % of sprouting than the tail setts.

COCOS, (1984) 2 01-09

doi: 10.4038/cocos.v2i0.809

How to Cite: Ibrahim, M. & Liyanage, M. de S., (2009). Efficacy of Calcium Carbide and leaves of Croton aromaticus and Averrhoa bilinbi in breaking dormancy of Oioscorea yams. COCOS. 2, pp.1–9. DOI: http://doi.org/10.4038/cocos.v2i0.809
Published on 16 Jul 2009.
Peer Reviewed

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