https://publication.npru.ac.th/jspui/handle/123456789/2453 รายงานการประชุมวิชาการระดับชาติ ครั้งที่ 18 มหาวิทยาลัยราชภัฏนครปฐม 2026-10-14T05:54:25Z https://publication.npru.ac.th/jspui/handle/123456789/2460 Title: Evaluation of COD Removal Efficiency from Municipal Soild Leachate by Photocatalysis; A case study of Leachate from Nonthaburi Provincial Administrative Organization Landfill Authors: Kananwut, Nipada; Phuinthiang, Patcharaporn Abstract: At present, landfilling remains the predominant method of waste management due to its low cost and its capacity to accommodate large volumes of waste. However, landfilling has certain limitations that can contribute to environmental problems. The generation of leachate is one of the issues commonly encountered. This research investigated the use of Titanium Dioxide to treat COD in leachate using a light-catalyzed ultraviolet (UV) process to break down organic matter in leachate from the Nonthaburi Provincial Municipality landfill. The study found that using Titanium Dioxide in combination with a light-catalyzed UV process at a wavelength of 365 nm and a power of 30 watts achieved 14.28% COD removal efficiency in leachate at a jar test speed of 50 rpm, pH 7, and an optimal reaction time of 4 hours. This treatment offers a viable alternative for treating municipal solid waste leachate in the future. 2026-08-28T00:00:00Z https://publication.npru.ac.th/jspui/handle/123456789/2459 Title: Efficacy of plant resistance inducers in controlling anthracnose disease in chili pepper Authors: Aonsri, Natnicha; Rattanakreetakul, Chainarong; Keawmanee, Pisut Abstract: Chili production faces significant yield losses due to anthracnose disease caused by Colletotrichum spp. Conventional chemical control methods are limited by concerns over chemical residues and the development of pathogen resistance. This study aimed to identify the causal agents of anthracnose disease and to evaluate the effectiveness of resistance-inducing agents for sustainable disease management. Chili samples showing disease symptoms were collected from Nakhon Pathom and Kanchanaburi provinces. The pathogens were isolated and identified based on morphological characteristics, revealing C. truncatum and C. gloeosporioides. Pathogenicity tests on seven chili cultivars at the fruiting stage showed that the cultivar CA365×1355 was highly susceptible to C. truncatum. The efficacy of four plant resistance inducers salicylic acid, acibenzolar-S-methyl, β-aminobutyric acid and chitosan was evaluated on the susceptible cultivar CA365×1355. Disease severity was assessed after treatment and inoculation. At 14 days after treatment, salicylic acid, β-aminobutyric acid, and chitosan reduced disease incidence by 75.35%, 65.19%, and 39.25%, respectively, with consistent results observed at 21 days. The findings indicate that resistance-inducing agents, particularly salicylic acid and β-aminobutyric acid, are effective in controlling anthracnose caused by C. truncatum. These agents represent environmentally friendly alternatives for sustainable chili disease management. This study provides a foundation for the development of integrated plant disease management strategies in the future. 2026-07-28T00:00:00Z https://publication.npru.ac.th/jspui/handle/123456789/2458 Title: Detection of Fungal Occurrence and Mycotoxin Contamination in Grasses Hay Authors: Doksri, Chanunya; Keawmanee, Pisut; Rattanakreetakul, Chainarong Abstract: Forage grasses are a vital nutritional source for ruminants. Roughage is the primary energy source for ruminants. However, stored forage is frequently susceptible to fungal contamination. Such contamination usually occurs in two main ways: either through direct fungal growth on the forage or via the transfer of mycotoxins from contaminated feed consumed by ruminants. This study investigated fungal contamination and mycotoxin levels in three grass hay samples: two from mauritius grass and one pangola grass. Fungal isolation was performed using the dilution plate method on four different types of culture media. The results indicated that czapek-dox agar and rose bengal agar were more effective for fungal enumeration compared to czapek-dox agar supplemented with dicloran or malachite green. Fusarium spp. was detected in all forage grass hay at concentrations ranging from 3.0 – 6.0 × 104 CFU/g, while Penicillium spp. was found at 1.1 – 5.9 × 104 CFU/g, except the pangola grass hay sample showing the lowest Penicillium spp. count 0.2 – 0.6 × 104 CFU/g. Mycotoxin analysis using the ELISA method revealed that concentrations of deoxynivalenol, T-2/HT-2 toxins, and fumonisin were within the European Union regulatory limits. However, the zearalenone level in the pangola grass hay sample was found to be 517 ppb., exceeding the 500 ppb. safety threshold. These toxins are predominantly reported to originate from Fusarium spp. This study highlights the potential for mycotoxin accumulation in forage and emphasizes the importance for farmers to implement proper storage practices and mycotoxin control measures to ensure animal safety. 2026-08-28T00:00:00Z https://publication.npru.ac.th/jspui/handle/123456789/2457 Title: Impact of the antibacterial chemicals on antagonistic Bacillus spp. consortium and the pathogenic soil fungi: Phytophthora sp. and Rhizoctonia sp. Authors: Jansri, Araya; Keawmanee, Pisut; Rattanakreetakul, Chainarong Abstract: Soil-borne fungi, particularly Phytophthora sp. and Rhizoctonia sp., are major causes of agricultural yield losses. The management of soil-borne diseases commonly relies on bactericidal chemicals, which may adversely affect beneficial microorganisms, especially Bacillus spp. This study aimed to determine the effects of bactericidal chemicals on Bacillus spp. and their efficacy in controlling Phytophthora sp. and Rhizoctonia sp. The effects of bactericidal chemicals on antagonistic bacteria were evaluated by measuring inhibition zones (clear zones) and bacterial turbidity using three isolates of Bacillus subtilis and one isolate of Bacillus velezensis. The results showed that all Bacillus spp. isolates were most strongly inhibited by the combination of Gentamicin and Oxytetracycline. In contrast, SiO2 + Al2O3 + CaO, Polyoxyethylene, ZnO, and Kasugamycin exhibited progressively lower inhibitory effects on bacterial growth, respectively. The four Bacillus isolates were subsequently tested for compatibility using the cross-streak method. No antagonistic interactions were observed among the isolates, indicating that they were compatible and could be combined into a Bacillus consortium. The consortium was then evaluated in combination with bactericidal chemicals at a concentration of 2,000 ppm. against Phytophthora sp. and Rhizoctonia sp. The combined treatment with SiO2 + Al2O3 + CaO completely inhibited fungal mycelial growth. Polyoxyethylene, ZnO, and the combination of Gentamicin and Oxytetracycline also exhibited high antifungal activity; however, these treatments completely inhibited the growth of the Bacillus consortium. In contrast, Kasugamycin did not inhibit the growth of the Bacillus consortium, allowing its combined application with the bacteria to suppress fungal growth by 56.67–68.89%. The results also demonstrated that Rhizoctonia sp. was more sensitive than Phytophthora sp. to treatments combining bactericidal chemicals with the Bacillus consortium. Overall, the combined application of Si2O + Al2O3 + CaO, Polyoxyethylene, ZnO, and Kasugamycin with the Bacillus consortium effectively controlled both Phytophthora sp. and Rhizoctonia sp. 2026-08-28T00:00:00Z