Author: Swagata Saikia, Bharat Chandra Nath, Pranaba Nanda Bhattacharyya, Rajashree Chetia, Pradip Kumar Borah & Achinta Saikia
Citation: Saikia, Swagata, et al. "Sustainable management of citrus canker pathogenesis using Panchagavya and Jeevamrut: exploiting the fermented organic biofertilizers in plant protection." Journal of Plant Pathology (2026): 1-22.
Abstract:
https://link.springer.com/article/10.1007/s42161-026-02210-2
Citrus Canker pathogenesis, caused by Xanthomonas citri pv. citri, is a highly destructive disease affecting citrus trees, leading to substantial economic losses in citrus industry with yield declines up to 90% in severe cases. The current investigation examines the management of citrus canker pathogenesis utilizing organic bioformulations such as Panchagavya and Jeevamrut under both in vitro and field evaluations. The severity of the infection was evaluated through an image-based technique, with manual observation conducted to confirm the disease severity percentage. Additionally, the induction of plant defense-related metabolites in Assam lemon in response to organic formulations was analyzed. Combined applications of Panchagavya and Jeevamrut effectively reduced the disease severity by 22.49% when evaluated using image-based technology. Two-way ANOVA demonstrated greater accuracy of image-based technology comparison to manual observations, with both datasets exhibiting a positive correlation. The highest quantities of plant defense-related metabolites, including total phenol (5.49 mg/g dry weight), flavonoid (1.52 mg/g dry weight), alkaloid (3.58%), tannin (1.06 mg/g dry weight), saponin (1.08 mg/g dry weight), terpenoid (20.01 mg/g dry weight), and vitamin C (43.09 mg/g dry weight), were detected in plants subjected to combined administration of Panchagavya and Jeevamrut. LC-MS analysis followed by in silico molecular docking have revealed the presence of rhamnetin, a flavonoid with potent antioxidant, antibacterial, and anti-inflammatory properties, suggesting agricultural benefits. Similarly, defence-related enzyme concentrations were highest for peroxidase (3.41 Abs/min/g), followed by phenylalanine ammonia lyase (2.49 µg of transcinnamic acid/min/g), polyphenol oxidase (1.68 Abs/min/g), and β 1,3 glucanase (0.80 µg of glucose/min/g) in plants treated with combined applications of Panchagavya and Jeevamrut during field evaluation. The investigation indicates that eco-friendly organic formulations may replace toxic chemicals and pesticides in managing canker pathogenesis in citrus trees, supporting climate smart citrus cultivation.
Author: Swagata Saikia, Bharat Chandra Nath, Pranaba Nanda Bhattacharyya, Rajashree Chetia, Pradip Kumar Borah & Achinta Saikia
Citation: Saikia, Swagata, et al. "Sustainable management of citrus canker pathogenesis using Panchagavya and Jeevamrut: exploiting the fermented organic biofertilizers in plant protection." Journal of Plant Pathology (2026): 1-22.
Abstract:
https://link.springer.com/article/10.1007/s42161-026-02210-2
Citrus Canker pathogenesis, caused by Xanthomonas citri pv. citri, is a highly destructive disease affecting citrus trees, leading to substantial economic losses in citrus industry with yield declines up to 90% in severe cases. The current investigation examines the management of citrus canker pathogenesis utilizing organic bioformulations such as Panchagavya and Jeevamrut under both in vitro and field evaluations. The severity of the infection was evaluated through an image-based technique, with manual observation conducted to confirm the disease severity percentage. Additionally, the induction of plant defense-related metabolites in Assam lemon in response to organic formulations was analyzed. Combined applications of Panchagavya and Jeevamrut effectively reduced the disease severity by 22.49% when evaluated using image-based technology. Two-way ANOVA demonstrated greater accuracy of image-based technology comparison to manual observations, with both datasets exhibiting a positive correlation. The highest quantities of plant defense-related metabolites, including total phenol (5.49 mg/g dry weight), flavonoid (1.52 mg/g dry weight), alkaloid (3.58%), tannin (1.06 mg/g dry weight), saponin (1.08 mg/g dry weight), terpenoid (20.01 mg/g dry weight), and vitamin C (43.09 mg/g dry weight), were detected in plants subjected to combined administration of Panchagavya and Jeevamrut. LC-MS analysis followed by in silico molecular docking have revealed the presence of rhamnetin, a flavonoid with potent antioxidant, antibacterial, and anti-inflammatory properties, suggesting agricultural benefits. Similarly, defence-related enzyme concentrations were highest for peroxidase (3.41 Abs/min/g), followed by phenylalanine ammonia lyase (2.49 µg of transcinnamic acid/min/g), polyphenol oxidase (1.68 Abs/min/g), and β 1,3 glucanase (0.80 µg of glucose/min/g) in plants treated with combined applications of Panchagavya and Jeevamrut during field evaluation. The investigation indicates that eco-friendly organic formulations may replace toxic chemicals and pesticides in managing canker pathogenesis in citrus trees, supporting climate smart citrus cultivation.