Study on Effectiveness of DRC+3, Ascorbic Acid and Sodium Nitroprusside (SNP) on Recovery of Tapping Panel Dryness (TPD) of Rubber Trees

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dc.contributor.authorWatawala, W.K.S.W.
dc.date.accessioned2021-05-18T10:16:05Z
dc.date.available2021-05-18T10:16:05Z
dc.date.issued2015
dc.description.abstractTapping panel dryness of rubber is known as a physiological disorder (oxidative stress) which occurs in all rubber clones growing everywhere in the world resulting in severe loss of yield. At present, TPD affected trees are rested for about six months period to reduce stress conditions to the tree in order to minimize TPD. There is no any effective treatment has been found to prevent or cure TPD condition. Therefore, rubber growers face serious problems due to high economic losses caused by TPD. This experiment was conducted to find the effectiveness of some chemical treatments for trees affected with TPD. Ninety TPD affected trees and 30 healthy trees of clone RRIC 121 that were planted in 1996 were selected. All the trees were being tapped at S/2 d2, downward (,L) tapping system in the first renewed panel (C=BI 1panel). A commercial chemical named, DRC+3, Ascorbic acid (AA) and Sodium Nitroprusside (SNP) as a NO (Nitric oxide) donor were used for the experiment which are said to having antioxidant properties. DRC+3 (1g per tree with 6 days intervals), Ascorbic acid (1mM & 0.5mM with 6 days intervals) and Sodium Nitroprusside (100pM & 50 p.IVI with 2 weeks intervals) were applied on affected TPD trees with an untreated control. In another experiment, DRC+3 (1g per tree with 10 days intervals) was applied for healthy trees with untreated control. Although data were not statically significant, there is a trend in increasing the yield per tree per tapping (g/t/t/) in TPD affected trees treated with DRC+3and, Ascorbic acid, more prominently with 1 mM AA. Higher concentrations of Sodium Nitroprusside might be preferred as there was a positive effect on increasing yield of TPD affected trees with 100IAM SNP compared to 50t.IM concentration, though the yield increase was not statistically significant. When compared to the pretreatment data and yield increase during the short period of the experiment, further continuation of this experiment is needed to arrive at firm conclusions. Key words — Ascorbic acids, DRC+3, Flow rate, Physiological disorder, Plugging index, Sodium nitroprusside, Tapping panel drynessen_US
dc.identifier.otherUWU/PLT/11/0015
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6782/UWULD%20PLT%2011%200015-29042019085833.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/PLT/11/0015
dc.subjectPalm and Latex Technology and Value Addition Degree Programme ( PLT)en_US
dc.titleStudy on Effectiveness of DRC+3, Ascorbic Acid and Sodium Nitroprusside (SNP) on Recovery of Tapping Panel Dryness (TPD) of Rubber Treesen_US
dc.title.alternativeResearch Article – PLT 2015en_US
dc.typeThesisen_US
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