Harzianum A is primarily studied for its antifungal properties, particularly in agricultural and plant protection contexts. It has shown effectiveness against various phytopathogenic fungi, making it a promising candidate for biocontrol agents in sustainable farming. By inhibiting the growth of harmful fungal pathogens, it helps protect crops without the need for synthetic fungicides. Its application is being explored in seed treatment and soil amendment to prevent fungal infections in economically important plants. Additionally, due to its natural origin and targeted activity, Harzianum A supports the development of environmentally friendly pest management strategies.