Journal of Technology and Agricultural Innovation

Ginger Production with Integrated Technologies to Reduce Bacterial wilt Disease in Loei Province

Emorn Pectthong — 2025-11-19

This research has the objective to reduce of bacterial wilt in ginger (Zingiber officinale). Field trials were conducted in Ban Pong Kwang, Pong Kwang Subdistrict, Phu Ruea District, Loei Province, Thailand, from 2022 to 2024. Test method : the soil was sterilized by applying urea at 80 kg/rai mixed with lime at 800 kg/rai (1:10 ratio), broadcast evenly, plowed under, and covered for at least three weeks. The soil was then opened and ridged for planting. Ginger rhizomes were soaked in a suspension of the antagonistic bacterium Bacillus subtilis BS-DOA 24 at 50 g per 20 L of water for 30 minutes prior to planting and spray every 30 days after planting. Remove diseased plants from the plot and sprinkle them with urea mixed with lime in the holes at a ratio of 80:800 Kg/rai. This method was compared with conventional farmer practices under similar environmental conditions. Test results found that, Ginger wilt disease was found to occur in 56% of cases in the the test method and 94% in the farmer’s method. The average yield of the Test method was 7,753 kg/rai, significantly higher than the 5,589 kg/rai obtained by the farmer’s method (p < 0.05). Production costs decreased by 5%, resulting in a 45% increase in net income. These results suggest that this integrated approach can be recommended to ginger growers in Loei Province and similar areas to reduce bacterial wilt and improve production efficiency.

Calcium Chloride Foliar Application Increases Production Efficiency and Maintains the Postharvest Quality of Sweet Tamarind

Panumas Kotepong — 2025-11-19

Fungal infection is one of the serious problems found in the pod of sweet tamarind which degrades their quality and shelf life.Therefore, this study is aimed to investigate the optimal calcium chloride foliar application reducing fungal infection before and after harvest in the pods of sweet tamarind cv. Si Thong. It was found that sweet tamarind treated with 0.5% calcium chloride three times before harvesting three months had the highest total yield per plant 26.89 kg per plant, pod weight 39.56 g and pod length 18.16 cm. In addition, sweet tamarind treated with calcium chloride had higher firmness and peel calcium content than other treatments. However, the quality of sweet tamarind such as soluble solids, titratable acidity and vitamin C were not statistically different among treatments. After storage at room temperature 30 ± 2°C for three months, sweet tamarind treated 0.5% calcium chloride three times before harvesting three months had the lowest fungal count of 1.0×10² CFU/g. In terms of economic returns, sweet tamarind treated with 0.5% calcium chloride three times before harvesting three months had the highest income of 43,024 baht per rai and profit increased by 26.22% when compared with the other treatment. Therefore, foliar application of 0.5% calcium chloride three times before harvesting three months was highly effective in increasing yield and reducing quality loss of sweet tamarind.

The Severity of Natural Disaster Impacts on Waterfall-Based Tourist Sites in Namtok Yong National Park

Surasak Choothong — 2025-11-19

This research aimed to evaluate the biophysical and psychological impacts of natural disasters on waterfall-based tourist attractions within Namtok Yong National Park, Nakhon Si Thammarat Province, and to propose sustainable management strategies. The study employed Sensory Evaluation combined with descriptive statistical analysis, with field data collected from 400 tourists using proportional sampling and time interval sampling methods. The findings revealed that most waterfalls (6 out of 9) experienced moderate levels of biophysical impact. Khlong Chang Waterfall exhibited the highest average impact score (3.18), whereas Nan Pliew Waterfall had the lowest (1.39). The most severe indicators included tree falls caused by heavy rainfall (3.52) and the collapse or death of large trees (3.33). Soil and water-related impacts, such as soil erosion and turbidity, were observed at moderate levels. In terms of psychological impacts, the majority of tourists (68.89%) showed low awareness of disaster-related effects despite evident signs of environmental damage. Overall, the study highlights the vulnerability of waterfall ecosystems to natural disasters, as well as the gap in tourists’ risk perception. Policy recommendations include restricting environmentally disruptive constructions, developing educational materials on natural disaster impacts, and enhancing community participation in resource management. These measures aim to strengthen the foundation for sustainable ecotourism development in the long term.

Assessment of The Potential of Canal-Side Trees for Bank Erosion Prevention: A Case Study of Tha Yai Subdistrict Municipality, Thung Song District, Nakhon Si Thammarat Province

Wattana Na Nakhon — 2025-11-19

This study aimed to (1) survey tree species and evaluate the potential of riparian trees along the Pak Phraek Canal in Tham Yai Subdistrict, Thung Song District, Nakhon Si Thammarat Province, (2) examine the factors influencing their effectiveness in preventing riverbank erosion, and (3) compare local residents’ perceptions of tree potential. A mixed-methods approach was employed. Physical data of riparian trees were collected from 10 systematically sampled sites. Tree potential was assessed using a weighted scoring equation based on three criteria: (1) root system stability, (2) hydrological tolerance and erosion resistance, and (3) ecological and socio-cultural value. In addition, perception data were gathered from 63 canal-side households and analyzed using percentage, mean, standard deviation, and t-test. Results revealed that riparian trees were present in only 6 out of 10 sites. The most common species included Sandoricum koetjape, Dipterocarpus alatus, Calophyllum inophyllum, Lagerstroemia floribunda, and Alstonia scholaris. The overall potential score was at a moderate level ( 𝑥̄ = 3.40), indicating that riparian trees provide both biodiversity value and erosion control capacity. Native species with diverse root systems and tolerance to waterlogged conditions-such as Hopea odorata, Barringtonia acutangula, Syzygium cumini, and Lagerstroemia spp. were identified as the most suitable for riverbank stabilization. Local residents demonstrated high awareness and understanding of the ecological and socio-cultural functions of riparian trees. Root architecture and hydrological tolerance were found to significantly influence tree potential (p ≤ 0.01). The findings highlight the importance of selecting native, root-stable species for sustainable riparian restoration and community-based conservation.

Selection of carbaryl and cypermethrin-specific DNA aptamers for quantitative detection using electrochemical aptasensor technique

adcharapun chaicharoen — 2025-11-19

Testing for pesticide residue is a necessary step in the food safety production process. However, testing is complicated, time-consuming, and costly. Therefore, this research aimed to develop a simple and rapid method for pesticide residue detection. This study aimed to select DNA aptamers specific to carbaryl and cypermethrin for the development of an electrochemical aptasensor-based detection system. Carbaryl and cypermethrin standards were used as aptagen targets during aptamer selection via Systematic Evolution of Ligands by Exponential enrichment (SELEX) and indirect enzyme-linked aptamer assay(ELAA). A total of 13 and 22 DNA aptamer strands binding to carbaryl and cypermethrin, respectively, were successfully isolated. Among these, the carbaryl-binding aptamer Car26 and cypermethrin-binding aptamer Cyp126 were immobilized onto screen-printed gold electrodes (SPE gold) to construct biosensors for detecting pesticide residues in vegetables. The developed aptasensors demonstrated low detection limits (LOD) of 0.049 ppm for carbaryl and 0.044 ppm for cypermethrin. Compared to conventional chemical analysis methods, this electrochemical aptasensor offers lower cost, digital quantitative output, and user-friendly operation, making it a practical tool for rapid on-site screening.

Human Resource Development for Enhancing Tourism Resource Potential in the Development and Restoration of Tourist Attractions in Chulabhorn District, Nakhon Si Thammarat Province

Surasak Choothong — 2025-11-19

This research aims to assess the potential of tourism resources and to enhance human resource capacity in participatory tourism resource assessment. The study further aims to design and develop tourism routes and interpretive programs that support the restoration and development of tourist attractions in Nakhon Si Thammarat Province. The study employed a mixed-method survey approach, integrating quantitative and qualitative data from a sample of 250 residents and conducting five practical training workshops. The findings revealed that most tourist sites in the area, such as the Inscription Stone at Chong Khoi Valley, Nop Khao Terik, and the Three Subdistrict Viewpoint, possess moderate potential and can be further developed to enhance their distinctiveness in terms of value, attractiveness, management, and development opportunities. Furthermore, the workshops aimed at strengthening skills in potential assessment, plant selection, landscape decoration, interpretive trail development, and landscape maintenance significantly improved participants’ learning outcomes (p < 0.01). Additionally, two main participatory tourism routes and programs were designed based on actual location coordinates, with appropriately calculated travel and visiting times. This study demonstrates that local human resource development is a crucial mechanism for promoting sustainable tourism and can serve as a model for other communities to effectively manage their own tourist attractions.

Evaluation of Yield and Profit of Cassava Production under Precision Water and Fertilizer Management System

Thitiporn Machikowa — 2025-11-19

The research evaluated the yield, quality, and economic profitability of cassava when precision water and fertilizer management were compared with farming practices. The experiment was conducted in Nakhon Ratchasima Province in 10 farmer fields, which spanned 5–10 rai with different soil textures (clay loam, clay, and sandy loam soils). Cassava cultivar ‘Rayong 72’ was planted across all fields, with drip irrigation providing a water supply. Two water and fertilizer management practices were compared (T1: The precision management, T2: Farmer practice). These systems were compared in terms of their effects on cassava growth, yield, starch content, and production profitability. The results revealed that precision management produced 6.91 tons/rai of cassava with 24.74% starch content, which exceeded the farmer practice output of 5.02 tons/rai with 23.17% starch. The tuber yield from precision management increased by 40.37% and starch content rose by 7.07% compared to farmer practice. The production costs between these systems did not show any significant statistical difference (T1 = 11,211 THB/rai; T2 = 12,198 THB /rai). The income generated by precision management reached 15,915 THB/rai, whereas farmer practice produced 10,848 THB/rai. The precision management produced a net profit of 4,704 THB/rai, but farmer practice resulted in a net loss of 1,350 THB/rai. The research demonstrates that precision water and fertilizer management lead to improved cassava yield and quality, as well as enhanced economic performance.