Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal CORD
L. C. P. Fernando
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Library & Information Science

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Toxins Produced by Fusarium Species in Leaf Scorch Decline Affected Coconut Palms (Cocos nucifera L.): Quantitative Analysis of Fusaric Acid, Zearalenone and T-2 P. H. A. P Siriwardhana; L. C. P. Fernando; J. M. M. A. Jayasundara
International Coconut Community Journal Vol 25 No 1 (2009): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v25i1.546

Abstract

Leaf Scorch Decline (LSD) is a disorder of coconut (Cocos nucifera L.) prevalent in Sri Lanka, for which the etiology is yet unknown and hence a study was conducted to identify the toxins produced by Fusarium spp. associated with LSD-affected palms. Root, stem and leaf tissues of LSD-affected and healthy palms were used to analyze the toxin content. Gas Chromatographic (GC) analysis carried out for Fusaric acid (FA), Zearalenone (ZEA) and T-2 (a Trichothecene) revealed the presence of FA in stem or leaves of many affected palms, but not in any of the roots. Total FA in stem and leaves was significantly higher (p>0.01) in affected palms than in healthy palms. Healthy palms were free of FA. Although ZEA and T-2 were present in both healthy and affected palms, the only significant difference between the two groups was ZEA in stem tissues. A strong association between FA and the presence of ZEA suggest they influence the production of LSD symptoms. The similarity of symptoms of Fusarium wilt diseases in other plants and LSD are discussed.
Toxins Produced by Fusarium Species in Leaf Scorch Decline Affected Coconut Palms (Cocos nucifera L.): Quantitative Analysis of Fusaric Acid, Zearalenone and T-2 P. H. A. P Siriwardhana; L. C. P. Fernando; J. M. M. A. Jayasundara
International Coconut Community Journal Vol 25 No 1 (2009): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v25i1.546

Abstract

Leaf Scorch Decline (LSD) is a disorder of coconut (Cocos nucifera L.) prevalent in Sri Lanka, for which the etiology is yet unknown and hence a study was conducted to identify the toxins produced by Fusarium spp. associated with LSD-affected palms. Root, stem and leaf tissues of LSD-affected and healthy palms were used to analyze the toxin content. Gas Chromatographic (GC) analysis carried out for Fusaric acid (FA), Zearalenone (ZEA) and T-2 (a Trichothecene) revealed the presence of FA in stem or leaves of many affected palms, but not in any of the roots. Total FA in stem and leaves was significantly higher (p>0.01) in affected palms than in healthy palms. Healthy palms were free of FA. Although ZEA and T-2 were present in both healthy and affected palms, the only significant difference between the two groups was ZEA in stem tissues. A strong association between FA and the presence of ZEA suggest they influence the production of LSD symptoms. The similarity of symptoms of Fusarium wilt diseases in other plants and LSD are discussed.
Impact of the coconut mite (Aceria guerreronis Keifer) on the coconut industry in Sri Lanka I. R. Wickramananda; T. S. G. Peiris; M. T. Neil Fernando; L. C. P. Fernando; S. Edgington
International Coconut Community Journal Vol 23 No 1 (2007): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v23i1.559

Abstract

The coconut mite (Aceria guerreronis Keifer) was first reported in Sri Lanka in 1997. Since then it has been a serious threat to the coconut industry. Feeding of coconut mites beneath the perianth of developing nuts result in scarring of the nut surface. In severe infestations, reduced nut size and nut malformation can also occur. A survey was carried out during 2003/2004 in five mite infested zones (MIZ) of Sri Lanka to assess the impact of coconut mite on various sectors of the coconut industry. The percentage of damaged nuts due to coconut mite was significantly different between the MIZ. There were also variations relative to nut size and shape. Irrespective of spatial and temporal variability, nut loss per mite infested palm was estimated to be 15.9% per annum. A 2-3% slowing down in the growth of annual national coconut production was projected due to coconut mite infestation. The loss to the coconut grower, selling at the rate of SLR 15/nut, was estimated to be Sri Lankan Rupee (SLR) 6240/ha (57.25 US$/ha) if the estate was mite infested. The de-husked weight and fresh husk weight of a coconut nut were also significantly different in relation to the mite damage and nut size and shape. From a randomly selected 10,000 nuts, the reduction of fresh husk weight was approximately 15% as a result of mite infestation, together with a loss of around 195 kg of desiccated coconut. All of the impact indicators varied significantly both spatially and temporally.
Co-Authors I. R. Wickramananda J. M. M. A. Jayasundara M. T. Neil Fernando P. H. A. P Siriwardhana S. Edgington T. S. G. Peiris