Spiramilactone B is primarily investigated for its potential antifungal properties, particularly against plant-pathogenic fungi. It shows promise in agricultural applications as a natural fungicide, helping to protect crops from fungal infections without the environmental impact associated with synthetic chemicals. Its mode of action appears to involve disruption of fungal cell membrane integrity, which makes it effective at low concentrations. Due to its natural origin and biodegradable nature, it is considered a candidate for use in sustainable farming and organic agriculture. Research is ongoing to evaluate its stability, formulation, and broad-spectrum activity under field conditions.