http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/133 2026-04-03T18:00:23Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/8799 Bioactivities of isolated phytochemical constituents and extracts of crateva adansonii. Vinujan, S.; Saravanan, V.; Pholtan, R. Crateva adansonii DC. is a tree belonging to the Capparaceae family. In traditional medicine, it is used to cure several disorders including constipation, earache, fevers, itch, malaria, rheumatic pains, and snakebites. Furthermore, phytochemicals including daucosterol, phytol, pyropheophorbide A, suramin, and ψ-taraxasterol have been isolated from different parts of C. adansonii. This review paper objects to scrutinize, recap, and document the reported bioactivity studies of C. adansonii. ScienceDirect, Web of Science, Semantic Scholar, Scopus, and PubMed were utilized to detect the applicable published works from 1900 to June 2021. Up to now, in vivo and in vitro scientific evidence is available for various bioactivities. In addition, analgesic, antiarthritic, antibacterial, anticancer, antifungal, antiinflammatory, antimalarial, antioxidant, and antiprotozoal activities have been observed for various parts of this plant. This work supports a detail information related to this plant for further studies in the future. 2021-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/6235 Pharmacological activities of extracts and isolated compounds of Acalypha Fruticosa Forssk. (Euphorbiaceae) Vinujan, S.; Saravanan, V.; Pholtan, R. Acalypha Fruticosa Forssk is a shrub belonging to the family Euphorbiaceae. A Fruticosa has a wide adaptation through traditional medicinal uses to cure several disorders such as dermatitis, diarrhea, dyspepsia, eye infection, inflammations, and stomachache. This article objects to identify, analyze, and document the reported pharmacological activities of a Fruticosa. Electronic databases namely, PubMed, Sciencedirect, Scopus and Web of Science were employed to identify the related publications from 1900 to August 2021. Compounds such as 1, 2-benzene dicarboxylic acid diisooctylester, and eicosyltrichlorosilane were recognized from different parts of this plant species Until now, only in vivo and in vitro scientific evidence is available for several pharmacological activities for A Fruticosa. Various parts of this plant species have anticancer , antidiabetic, anthelmintic, antibacterial, antileishmanial, and antiplasmodial properties. This work will benefit the investigators on pharmacological and phytochemical investigations of this plant species in the future. 2022-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/6232 Lethal Yellowing Disease in Borassus Flabellifer In Jaffna Peninsula Vinujan, S.; Emmanuel, C.J.; Arasakesary, S. J.; Srivijeindran, S. Palmyrah palm (Borassus flabellifer Linn.) is a highly versatile tree mainly distributed in the North and Eastern provinces of Sri Lanka. Even though the plant is rarely affected by pathogens due to its extremely woody nature, some significant abnormalities in plants growing in the Pungudutivu area in Jaffna Peninsula have been noted recently. The present study aimed to characterize the abnormality, identify the disease and confirm the possible causative agent. In this study, the progression and incidence of disease were determined through field visits. A literature search was conducted to compare the symptoms with other palm varieties. Additionally, the possibilities for phytoplasma infection were tested with phytoplasma-specific universal primers using PCR. Initially, the plants showed progressive leaf yellowing and drying from the leaf tip towards the petiole followed by collapsed spear leaf hanging downward in the crown. Finally, the crown falls off the trunk. The symptoms are characteristics of the lethal yellowing disease. The PCR result confirmed the association of phytoplasma with the diseased plants. To our knowledge, this is the first report from Sri Lanka regarding the lethal yellowing disease in Palmyrah palm. Since the disease severely affects the plant and spreads rapidly, there is an urgent need to study the epidemiology of the disease and to find out suitable control measures. 2022-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/5390 Evaluation Of Growth And Yield Performances Of Napier Grass Cultivar Pakchong-1 Under Different Spacial Patterns In The Kilinochchi District, Sri Lanka Sathees, D.; Sivajanani, S. Inadequacy of quality forage production is a major limiting factor for dairy production in the Sri Lankan dry zone. Napier grass cv Pakchong-1 (Pennisetum purpureum x Pennisetum glaucum) is a tropical grass with fastgrowing and high yielding ability. The study aims to determine the growth parameters and yield performance of Pakchong-1 grass under three different spacing of 30cm x 30cm, 90cm x 90cm and 120cm x 90cm in the Kilinochchi district, dry zone of Sri Lanka, from April 2019 to March 2020. A complete randomized design with three replicates was used in this study. Growth parameters were measured bi-weekly up to the 8th week and harvested the foliage after the 8th week in 56 days intervals. Plants at 30cm x 30cm spacing have shown the highest plant height of (153.00cm), the higher number of leaves (93.67), longer leaf length (95.33cm), wider leaf width (3.82cm)and higher leaves per tiller (11.33) at 8 weeks after planting (P<0.05). While the highest (P<0.05) the number of tillers (10.00) was recorded at 120cm× 90cm spacing. Fresh matter yields were highest (P<0.05) at 30cm x 30cm spacing in all cutting frequencies. The second cutting at the 14th week has shown the highest fresh matter yield(P<0.05) in all spacing. Pakchong – 1 can be suggested for the Sri Lankan dry zone regions at 30cm x 30cm spacing to provide the highest fresh matter output and optimal growth performance. 2022-01-01T00:00:00Z