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Seaweed extracts from Sargassum cristaefolium at 10% concentrations, effectively inhibited the mycelial growth of Colletotrichum gloeosporioides. According to the available literatures, the GC-MS analysis identified various compounds in these extracts that had a antifungal, antibacterial and antioxidant properties as per previous report. In both pot culture trials and field settings, the application of seaweed extracts via bulb treatment, soil drench, and foliar spray resulted in a notable decrease in the occurrence of twister blight disease. Among the treatments, treatment three, involving bulb treatment with S. cristaefolium at a 10% concentration, soil drench with the same seaweed at a 10% concentration and foliar application of S. cristaefolium at a 10% concentration, demonstrated a remarkable 69.39% reduction in twister blight, showcasing efficacy comparable to biocontrol agents and chemical fungicides. In pot culture conditions, increased levels of peroxidase, polyphenol oxidase, and phenylalanine ammonia lyase were observed, suggesting their involvement in enhancing resistance against disease. Histopathological examinations further revealed reduced tissue damage in treated plants. Additionally, protein content in both leaves and bulbs exhibited an increase in treated plants. This comprehensive study not only underscores the potential of seaweed extracts as effective biostimulants for disease management but also highlights their positive influence on overall plant health and productivity.

来源平台：ANNALS OF PHYTOMEDICINE-AN INTERNATIONAL JOURNAL