Proceedings of International Forestry and Environment Symposium最新文献

{"title":"Chemically Modified Coconut Shell Biochar for Removal of Losartan Potassium in Aqueous Solutions","authors":"Perera W.P.A., Pathirana C.D.K., Kannan N.","doi":"10.31357/fesympo.v27.6627","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6627","url":null,"abstract":"Emerging contaminants (EC) are newly recognized significant water pollutants and conventional wastewater treatment facilities are not sufficient at removing these trace contaminants. Biochar is well-known effective adsorbent for the removal of complex inorganic contaminants and organic contaminants from water. The present study, comprehensively investigates the sorption removal of Losartan potassium (LOS) through chemically modified biochar (CMBC) developed from green coconut (Cocous nucifera) shell. Effect of pyrolysis temperature (400o C, 500o C and 600o C), initial concentration of LOS (20−150 mg L−1), pH (3–11), temperature (20−400 C), dose of adsorbent (1.0–5.0 g L−1) and contact time (15−1620 mins) on the adsorption of LOS onto CMBC has been analyzed using a successive batch study. Biochar treated with 5% H3PO4 and pyrolyzed at 600o C shows the optimum result which is 60.72% removal of LOS with initial LOS concentration of 20 mg L−1, pH∼6, temperature 20o C, dose of adsorbent 5 mg L−1, agitation speed 150 rpm and contact time 24 h. The kinetic data of the adsorption study was best fitted into pseudo-2nd-order kinetics model. The Langmuir, Temkin and Freundlich isotherm models were studied and the experimental data were best represented by the Freundlich model. The thermodynamic study reveals the LOS adsorption was non-spontaneous, exothermic nature on CMBC.  \u0000Keywords: Biochar, Emerging Contaminant, Isotherm, Kinetics, Thermodynamics, Losartan Potassium, Pyrolysis  \u0000 ","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"27 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Preliminary Survey of the Avifaunal Diversity in Pampaimadu Premise of the University of Vavuniya, Vavuniya, Sri Lanka","authors":"Keerthanaram T., Wijerathna H.M.P.A., Sanjeewani H.K.N.","doi":"10.31357/fesympo.v27.6538","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6538","url":null,"abstract":"Vavuniya is a lowland dry zone district of the Northern Province of Sri Lanka, which is still unexplored with a natural forest cover of 1,238 km2. Even though there are many kinds of literature concerning the water birds of the Vavuniya, the diversity of tropical avifaunal species is still a gap which was the light of this study. The study area is situated 10 km from the center of Vavuniya along the A30 highway, with the dry-mixed evergreen forest as vegetation. The district is located within the dry zone which experiences a mean temperature of 28° C and annual rainfall of 1,400 mm. It also consists of 02 adjoined tanks along the boundary. The study points were used for the avifaunal survey during mid of March to end of July 2022. Habitat diversity within the study area was discussed using a prepared checklist and the community indices like the Shannon-Weiner index (H‘), Simpson‘s diversity index (D), Simpson‘s evenness (E), and Species richness (R) across various habitats ecosystem: Woodland-Paddy land (H1); Woodland-Water catchment area (H2); Forest (H3); Grassland with inundated land ecosystem (H4); and Manage Garden with Occasional trees (H5) of the study area. The checklist resulted in a total observation of 93 avifaunal species including 87 resident and 06 migrant species belonging to 47 families (including 09 endemics, and 05 nationally threatened species). Rock Pigeon (Columba livia) belongs to Family Columbidae with the highest frequency (68%, n=123) and is evenly distributed across different habitats but the family Ardeidae is found extensively dominating in H5 (39%). H1 is with the highest H‘ (3.5) and D (0.96); while H3 has the highest R (2.52) and E (0.62). The seasonally inundated habitats H2 and H4 bring water birds to the study area. It also increases the availability of avifaunal insectivores. Many anthropogenic disturbances, such as habitat alterations, intentional wildfire, and road mortality are the key threats encountered by the avifaunal species in the study area. In addition to that, the activity of stray dogs within the premises was observed to be a potential threat during the breeding season. Appropriate conservation strategies including landscape management, conservation of available forest land, and proper awareness of neighboring local communities are necessary to maintain the current ecological status.  \u0000Keywords: Avifauna, Checklist, Habitat variation, Species diversity, Vavuniya ","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"22 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Management of Free-floating Aquatic Weeds by Making Compost and Testing its Efficacy against Root-knot Nematode on Tomato","authors":"Pakeerathan K., Samaraweera I.D.D.J., Aruchchunan N., Mikunthan G.","doi":"10.31357/fesympo.v27.6568","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6568","url":null,"abstract":"Aquatic weeds are one of the prime pollution causing agents in fresh water bodies of Sri Lanka. In Sri Lanka, free-floating aquatic weeds such as Salvinia molesta, Eichhornia crassipes, Azolla spp and Pistia stratiotes are proliferating quickly and invading rapidly to new water bodies where threatening biodiversity by impeding light penetration and altering BOD and COD of the waterbody. This research was aimed to manage the aquatic weeds by composting and testing its efficacy on root-knot nematodes. Aquatic weeds were collected, mixed with fresh cow dung in 1:1 ratio and allowed for decomposition for 21 days. The recommended dose of prepared different compost was applied to tomato along with garden compost as control. The experiment was conducted in Complete Randomized Design (CRD) with four replicates. The data on nutritional qualities of the compost, plant growth parameters, and gall index were recorded. The data were subjected to ANOVA using SAS 9.1 and Tukey's HSD multiple comparison test was used to determine the best treatment combination at P<0.05. Total Nitrogen (N) content of composts were ranging from 1.42% to 5.6%. The highest significant N value of 5.6% was recorded in the Azolla spp based compost whereas the lowest N value of 1.42% was recorded in control. The highest total Phosphorus (P) content of 3.47% was observed in P. stratiotes based plant sample, whereas the lowest P value of 1.32% was recorded in the E. crassipes based compost. The total Potassium (K) content of this plant sample ranging from 1.3% to 24.4%. The highest K value of 24.4% was recorded in P. stratiotes based compost. The lowest K content of 1.3% was observed in control. Significantly higher shoot height (37.57 cm, 36.53), root length (18.75 cm and 17.5 cm), lower gall index (3.5,1.0), lower goal length (1.5 mm and 1.2 mm) and lower goal diameter (0.95 mm and 0.8 mm) were recorded in the application of S. molesta and Azolla spp based compost, respectively (P<0.05). Considering superiority of N, P and K level, and nematode suppressing efficacy, S. molesta and Azolla spp. based composts are superior than other composts. Therefore, findings conclude that the compost made from aquatic weeds are good source of plant nutrition, and can be substitute to chemical nematicieds to manage the nematodes in organic agriculture. Extensive field studies are needed for recommendation  \u0000Keywords: Aquatic weeds, Azolla spp., Compost, Root-knot Nematode","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Habitat Utilization and Behavioral Patterns of the Endemic Sri Lankan Green Pit Viper (Craspedocephalus trigonocephalus) in the Wet Zone of Sri Lanka","authors":"Mahaulpatha W.A.D., Dhananjani D.M.T.","doi":"10.31357/fesympo.v27.6540","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6540","url":null,"abstract":"Behavioral patterns and habitat utilization of the endemic Green Pit Viper (GPV) Craspedocephalus trigonocephalus were studied in the wet zone of Sri Lanka. The region, which is covered by the wet zone, has no significant dry periods and a moderately high mean annual rainfall of over 2,500 mm. Data collection occurred between April 2021 and March 2022 with a total of 260 hours of standardized sampling effort distributed throughout the collection period. The method used was an active search which consists of a visual search of up to six meters from the central line along each side of the quadrate. Quadrats were placed in habitats, taking each GPV sighting as the center of a quadrate. At each GPV-occupied quadrat, ambient temperature, body surface temperature, prey availability, perch position and perch light level were recorded. The day was divided into six-time periods as; early morning, morning, mid-day, evening, late evening, and night. Activity level was determined considering the number of GPV that could be visually observed. A total of 49 GPV were examined during the study. Focal animal sampling was conducted, and an ethogram was developed. A strong positive relationship was observed between ambient temperature (Ta) and body surface temperature (Ts) of GPVs (Pearson correlation r=0.936). The highest number of individuals preferred filtered sun light (57.14%). C. trigonocephalus mostly preferred distal position on the branches followed by middle and apical. There was a significant difference in the percentage of individuals with different behaviors [ANOVA, F=3.64, p<0.05]. Behavioral pattern of GPV varied in the temporal scale during the day. During the morning time slot, C. trigonocephalus spent most of the time ambushing (16.12%) and basking (6.42%) respectively. During the mid-day they spent most of their time basking (10.57%), followed by resting (7.15%). The evening, late evening, night, and early morning slots were spent mostly on ambushing. The highest average time of 239 min was spent on ambushing behavior. Feeding behavior (9.8 min) had relatively short time on average. Results of this study indicate that C. trigonocephalus is well adapted for the utilization of its preferred habitat in the wet zone, and that, it displayed behavioral patterns that vary within temporal scales, which results in more efficient and effective utilization of resources. Therefore, this study provides important insights for conservation and management of C. trigonocephalus by critically evaluating the requirements of this species.  \u0000Keywords: Craspedocephalus trigonocephalus, Behavior, Endemic pit viper, Wet zone ","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"12 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Valuation of Ecosystem Services for Driving Community-assisted Forest Landscape Restoration in Endane Biodiversity Corridor, Sri Lanka","authors":"Madawala M.M.G.I.N.M.B., Rajasooriya P.G.C.L., Fernando A.P.S., Perera A., Gunatilleke I.A.U.N., Nanayakkara S., Geekiyanage N.","doi":"10.31357/fesympo.v27.6955","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6955","url":null,"abstract":"The ecosystem services: direct or indirect benefits of ecosystems to human well-being, need to be recognized in conservation and restoration decision-making. In the human-dominated southwest Sri Lanka, we have established a forest landscape restoration project (Endane Biodiversity Corridor) linking a peripheral forest reserve to Sinharaja Rainforest Complex. The ecosystem services provided by tea monocultures, abandoned tea lands, and lowland home gardens were estimated employing a range of methods for estimating respective ecosystem service values with data collected from household surveys, key stakeholder interviews, and survey of tree flora in 20 m × 20 m plots for estimating aboveground carbon stock. The benefit transfer approach was used to value the supporting and regulating services. The total value of ecosystem services provided by this forest corridor landscape was 6,465 USD ha/yr in 2021. This amount included: provisioning services of 1,950 USD ha/yr, supporting services of 645 USD ha/yr, regulating services of 3,807 USD ha/yr, and cultural services of 38.8 USD ha/yr. Overall, our forest corridor landscape of 59.3 ha provided 382,362 of USD of ecosystem services a year. In comparison to tea monoculture, species-rich home gardens generate a high amount of provisioning services. Our study site is prone to ecosystem degradation due to human activities like forest land encroachment, illegal gem mining, and over-harvesting of forest products. However, we recognize the opportunity of enhancing the biodiversity of monoculture tea gardens and home gardens of the corridor following the principles of agroforestry and enrichment planting. These results i.e., the ecosystem service values among different land uses, are imperative for financing and encouraging community participation for forest restoration activities. \u0000Keywords: Forest resources assessment, Forest restoration, Common-based restoration","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"31 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Multispectral Drone for Quantitative Assessment of the Fertilizer Requirement for the Up-country Tea Plantation in Sri Lanka","authors":"Kumara U.I., Jayawardene D.T., Gunathilake B.M.","doi":"10.31357/fesympo.v27.7153","DOIUrl":"https://doi.org/10.31357/fesympo.v27.7153","url":null,"abstract":"\u0000 \u0000 \u0000The amount of chlorophyll content and structure would differ between diseased and healthy plants, affecting the NDVI values, which strongly correlated with fertilizer applications. The primary goal of this research is to use a multispectral drone to quantify the fertilizer requirements for the sample tea plantations in Nuwara Eliya, Sri Lanka. In contrast, a drone with multispectral imaging camera sensors was used to gather images covering blue, green, red, red-edge, and near-infrared bands. The collected images were analyzed, and geographic outputs were generated. The processed geospatial data were used to determine the NDVI values for each tea field, and the general health of the tea was estimated. Finally, NDVI readings and geospatial products from each tea field related to soil analytical data. Based on the NDVI values, 25 selected soil samples were collected using sampling plots. The concentrations of pH, electrical conductivity (EC), nitrogen (N), phosphorus (P) and potassium (K) were then determined using standard soil testing procedures. Finally, soil analysis results were combined with the geospatial data. In addition, the amount of Dolomite for each tea field was calculated based on the pH values, and the amount of nitrogen, phosphorus, and potassium was calculated as yield and area and based on the number of tea bushes. The tea plantations show an NDVI range of 0.76-0.81 for low healthy tea, 0.81-0.86 for medium healthy tea and 0.86-0.97 for healthy tea. The healthiness percentages of one of the tea plantation show 18% healthy tea, 54% medium healthy tea, and 22% low healthy tea. Conversely, the healthiness percentages of the other tea plantation show 44% healthy tea, 39% medium healthy tea and 17% low healthy tea based on the NDVI value. The average value of pH, EC, N, P, and K are 4.84, 41.58, 0.29, 0.11, 0.04 in tea plantations, respectively, and in other planation, average values of pH, EC, N%, P%, and K% are 4.83, 40.96, 0.36, 0.25, 0.04 respectively. The amounts of Dolomite for each tea field are 2685.32 Kg/ha and 977.34 Kg/ha. In one tea field, an average annual NPK fertilizer need is 685 kg per hectare, 94 kg per hectare, and 269 kg per hectare, respectively. Additionally, calculations based on tea bushes indicate that the average annual NPK fertilizer requirements are 685 kg, 89 kg, and 254 kg, respectively. Other tea filed average annual NPK fertilizer need is 88 kg per hectare, 24 kg per hectare, and 68 kg per hectare, respectively. Additionally, calculations based on tea bushes indicate that the average annual NPK fertilizer requirements are 90 kg, 25 kg, and 70 kg, respectively. However, these values have several limitations, such as climate, soil, plant, and cultural practices. This study mainly focuses on and creates Insights into Plant Health by assessing precise plant-level data using a multispectral imaging system. It had not been correlated with other factors except soil conditions. \u0000Keywords: Unmanned aerial ve","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"31 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Faunal Diversity and Biodiversity Conservation within Homagama Mahinda Rajapaksha College, Sri Lanka","authors":"Abegunawardhana P.D., Aththanayake R.K.P.S., Galhenage D.T.T.M, Dahanayaka K.S.S.S., Amarasinghe M.A.A., Nanediri D.G.S., Pathberiya I.N.","doi":"10.31357/fesympo.v27.7190","DOIUrl":"https://doi.org/10.31357/fesympo.v27.7190","url":null,"abstract":"A faunal diversity survey was carried out to analyze the faunal diversity in Homagama Mahinda Rajapaksha College in Colombo District, Sri Lanka. The survey site is located in a suburban area that is surrounded by disturbed properties. The aim of the survey was to analyze the faunal diversity and recognize the special habitat types in the school premises for conservation purposes. It could recognize five major zones which have different types of microhabitats and rich in faunal diversity. The survey was done as a visual encounter survey, and smartphones, digital cameras and binoculars were used to collect data of the fauna species for documenting and identifying purposes. Also, pitfalls traps, light traps and beating were used as survey methods. The study was done for three days including three random sampling events during both day and night. Standard guides were used for identifying and photographs, notes on observations were sent to experts on each taxon for further confirmation. A total of 188 fauna species were recorded during the survey including 55 species of vertebrates including five classes (Aves, Amphibia, Mammalia, Reptilia, Actinopterygii) and 133 species of invertebrates including six classes (Insecta, Gastropoda, Diplopoda, Clitellata, Chilopoda, Arachnida). The study could document 30 bird, 14 reptile, 6 mammals, 4 amphibian and 1 ray-finned fish species as vertebrates and 95 insect, 5 mollusks, 3 millipede, 2 clitellate, 2 centipede, 26 arachnid species as invertebrate fauna species in the school premises. Based on the results of the survey, the fauna diversity of the studied site is stable and depends on the microhabitat types in the different zones. As a suburban area, the species richness of the site is in well conditions. To keep stable and increase the fauna diversity of the site, doing regular surveys and recording data, generating microhabitats, and conserving highly diverse habitat types are suggested. Unique species like Indian Hare (Lepus nigricollis), Indian Crested Porcupine (Hystrix indica) were observed and as the only venomous snake species, Merrem‘s hump-nosed viper (Hypnale hypnale) was recorded. The faunal diversity of the studied site helps to keep the unique surroundings there and keeping frequent records and data on the site will help to maintain the biodiversity with constructions in and around the school premises.  \u0000Keywords: Faunal diversity, Suburban, Citizen Science, Conservation, Visual encounter ","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"27 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fungal Diversity in the Wounded Tissues of Gyrinops walla Trees and the Surrounding","authors":"Vidanage W.V.T.U., Subasinghe S.M.C.U.P., Manamgoda D.S., Hettiarachchige R.P.","doi":"10.31357/fesympo.v27.7195","DOIUrl":"https://doi.org/10.31357/fesympo.v27.7195","url":null,"abstract":"Gyrinops walla (Gaertn) of family Thymelaeaceae, is believed to be endemic to Sri Lanka and is mainly found in the lowland wet zone where the elevation is lower than 1,000 m and the annual rainfall is between 2,000 to 3,000 mm. This species is known for producing a valuable resin called agarwood in its trunk after being infected by pathogens, mainly fungi. Over 20 capable fungal species have been identified to stimulate agarwood formation in the trees of the agarwood- producing genus, Aquilaria. However, since such information is lacking for G. walla, this study aimed to determine the fungal taxa that induce agarwood formation in G. walla and to compare the fungal diversity between G. walla tissues, surrounding trees, and the soil. Samples were taken from four locations in the wet zone, Olugala, Morapitiya, Weragala, and Elpitiya, and one location in the intermediate zone, Kirimetimulla. Collected naturally wounded tissues from G. walla trees of those locations were surface sterilized before culturing. In addition, the stem samples were taken from the surrounding trees at 5 m radius from the sampled G. walla trees. Soil samples were collected at each location at 2.5 m distance along the north south directions of sampled G. walla trees which is from the sub-surface. A standard dilution series up to 1:10,000 was prepared for soil culturing. All the fungal colonies emerging from initial soil, stem cultures were isolated as pure cultures in separate PDA plates. Based on the colony morphology and growth parameters, all the pure cultures were categorized into 13 fungal isolates. Morphological and microscopic characteristics were used to identify the fungal isolates. Out of the 13, six isolates were identified as Aspergillus sp. (1, 2, 3), Rhizopus sp., Trichoderma sp., and Mucor sp. The unidentified isolates, due to the lack of reproductive structures, were named as morphotypes 5, 7, 8, 9, 11, 12 and 13. After identification, their presence and frequency of occurrence in different sample types i.e. resinous tissues and nonresinous tissues of G. walla, surrounding tree tissues and soil were evaluated in all five locations. For the comparison, diagrams were built. Thereby, predominant fungal isolates in each of the sample types were identified. Based on the occurrence of fungal isolates in each location, Olugala had the greatest fungal diversity, while Morapitiya had the lowest. Morphotype 07 was identified as the dominant isolate in resinous tissues of G. walla due to the presence of 15 isolates. Rhizopus sp. was also found as a common fungal isolate in the wounded tissues of all five locations. Trichoderma sp. was more abundant in the surrounding, while Aspergillus sp (1) was dominant in soil. Fungal isolates in resinous tissues were also present either in the non-resinous tissues of G. walla, surrounding tree tissues, or soil. Therefore, inocula are believed to enter the wounded tissues from nearby trees or from the soil, and spores from water, wind o","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"19 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemical Analysis of Some Selected Indigenous Plants in Eastern Region of Sri Lanka used for Minimizing Insect Damage on Stored Grains during Storage","authors":"Karunakaran S., Niranjana R.F.","doi":"10.31357/fesympo.v27.7192","DOIUrl":"https://doi.org/10.31357/fesympo.v27.7192","url":null,"abstract":"Grains are precious food in developing countries but are tragically susceptible to attack by several stored insects. Thus, grain productions often fall below demand. As the resistance of pests against synthetic chemical pesticides and residues in foods increased, consumers‘ awareness turned toward food and environmental safety. The studies conducted in Sri Lanka revealed that the botanical pesticides are being used to minimize these problems and have the potential to battle against pests on stored grains during storage. Further the reference in Sri Lanka evidenced that the botanical pesticides are readily available, inexpensive, easily biodegradable and low toxic to non-target organisms. With this concept the present study has been undertaken to analyze the secondary metabolites, known as phytochemicals that possess antioxidant or anti insecticidal properties, which are much safe, eco-friendly and can combat with the man-made chemicals in controlling the storage pests. The study was carried out to find the presence of phytochemicals namely, alkaloid, flavonoid, phenol, tannin, steroids, cardiac glycosides, terpenoid, saponine and reducing sugars in an aqueous extract of some selected indigenous plants, which are available in Eastern Region of Sri Lanka namely; Capsicum annuum (Chilli), Citrus aurantiifolia (Lime) Piper nigrum (Pepper), Azadiracta indica (Neem), Moringa oleifera (Moringa) Eucalyptus globules (Eucalyptus), Justicia adhatoda (Adhathodai) Annona reticulate (Annona), Cymbopogan citratus (Lemon grass) Vitex trifolia (Nochchi), Ocimum tenuiflorium (Thulsi), Lantenna camera(Nayunni), Eichhornia crassipes (Water hayasinth), Tagetes erecta (Marigold) piper longum (Thipilli) and Achyranthes aspera (Nayuruvi), that have pesticidal properties. The leaves of selected crops were dried at room temperature for a period of one week and grounded in to fine powder to take 10 g of powder from each to prepare 200 ml of water extract using electro thermal soxhlet for 36 hours and analyses qualitatively by the standard scientific procedures. The results showed that the water extract of Neem, Moringa and Thulsi contained all the above tested phytochemicals. The flavonoid was observed in all tested crops except Thipilil, which contained only phenol and tannin. Further Pepper, Eucalyptus, Lemon grass, Annona, and Chilli did not show alkaloids where Annona had only flavonoid, phenol and tannin. Nochchi showed all the phytochemicals except cardiac glycosides and terpenoid. The study confirmed the strength of tested crops in utilizing them in the pest management programme at storage because of the presence of one or more groups of the major insecticidal components like, alkaloids and flavonoids. The study also exposes the way for further studies related to the impact of individual plant insecticidal components against storage pests.  \u0000Keywords: Aalkaloids, Aqueous, Extract, Grains and phytochemical ","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"10 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhizospheric Fungal spp. of Tomato (Solanum lycopersicum L.) and Their Effect on Tomato Plant Growth and on Alternaria solani, the Causative Agent of Early Blight of Tomato","authors":"Deshappriya N., Fernando W.C.J.O., Fernando M.S.W.","doi":"10.31357/fesympo.v27.6554","DOIUrl":"https://doi.org/10.31357/fesympo.v27.6554","url":null,"abstract":"Tomato (Solanum lycopersicum L.) is a widely consumed crop throughout the world including Sri Lanka. Use of agrochemicals for enhanced yields and managing diseases associated with tomato results in deleterious impacts on soil microflora, fauna and leads to human health problems. A possible alternative is the use of rhizospheric microorganisms, as they are reported to improve productivity and protect various crops. Hence this study aimed to isolate rhizospheric fungal assemblages of tomato plants and evaluate their ability to solubilize phosphate while, controlling Alternaria solani, the causative agent of Early Blight of tomatoes. Rhizospheric fungi were isolated from commercial tomato cultivations in two agro-ecological zones (WM3b and IM2b), using soil dilution plate technique. Composite samples of soil attached to the root systems of five healthy plants, uprooted from each field were prepared and 10 g of each sample was used for the isolations. Twenty-seven fungal genera were isolated and Trichoderma and Penicillium were the frequently isolated genera. Phosphate solubilization ability of each fungal species was evaluated using Pikovskaya's agar and liquid medium, and four isolates (Eupenicillium sp., Talaromyces purpureogenus, Paecilomyces sp., and Purpureocillium lilacinum) with the highest phosphate solubilizing abilities were evaluated on tomato plant growth under greenhouse condition. The inocula of each fungal sp. were prepared by adding fifteen, 6mm diameter mycelial discs from each 5-day-old culture into polypropylene bags containing 90 g of sterile rice husk medium and incubated for 02 weeks at room temperature. Each pot contained a 4.6 kg layer of non- sieved sterilized potting medium (Sand: topsoil: Compost at 2:1:1 ratio) and a 2.5 kg layer of sieved medium on top, which was mixed with 15 g of inoculum. Three-week old, healthy tomato seedlings (variety-Bathiya) were planted (with 3 replicates) and allowed to grow with regular watering. Control pots contained potting medium with uninoculated sterile rice husk. Growth parameters such as Root and shoot lengths, fresh and dry weights of roots, shoots, and leaves were evaluated at 02-week intervals for 02 months and the results were analysed using ANOVA with Tukey‘s pairwise comparison. Plants treated with T. purpureogenus and P. lilacinum showed significant increases (p≤0.05) in all growth parameters in every evaluation. Dual culture plate assay on the Potato Dextrose Agar was used to test the effect of rhizospheric fungal spp. on the radial colony growth of A. solani, and Eupenicillium sp. showed the highest percentage inhibition (85.09±5.68%). Microscopic observations of inhibition zones between two colonies showed the presence of coils, loops, knobs, and haustoria, formed by inhibitory rhizospheric fungal species. Assays for Chitinase and Glucanase enzyme production showed that Mortierella sp.-1, P. lilacinum, Trichoderma sp.-1, and Acremonium sp. were the highest chitinase producers","PeriodicalId":205644,"journal":{"name":"Proceedings of International Forestry and Environment Symposium","volume":"5 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}