Bean Root Rot and Water Stress Impacting Yield After Applications of Salicylic Acid and Seaweed

Background and Objective: The benefits of salicylic acid and seaweed for yield improvement are understood. However, the impacts of these materials on bean root rot diseases and productivity are little examined. Thus, this study examined associations of irrigation, salicylic acid, and seaweed with bean root rot and yield under field conditions. Materials and Methods: Bean root rot and yield were examined across experimental plots treated with irrigation, salicylic acid, and seaweed. The H-test, correlations, principal component analysis, and linear regression were used to examine datasets. The significance at 0.05 probability level was considered for H-test and correlations. Results: Irrigation intervals significantly affected bean traits, including enzyme activity, ion leakage, photosynthesis, root rot, and yield. Principal component analysis (74% variance) linked lower ion leakage and shorter irrigation to higher yield (46.16%), while catalase, superoxide dismutase, and salicylic acid correlated with severe root rot (15.98%). Photosynthesis rate increased with salicylic acid and lower seaweed concentration (11.71%). A multivariate regression model (95% variance) predicted yield based on salicylic acid, seaweed, ion leakage, irrigation interval, photosynthesis, and root rot severity. Conclusion: Findings encourage experts and growers to improve bean yield by adequate irrigation at six-day intervals and applications of salicylic acid plus seaweed as potential tools for sustainable management of root rot and water stresses.