Streptomyces Lydicus for Mango Stem-End Rot

Stem-end rot is one of the major post-harvest diseases affecting mango fruits, causing significant losses during storage, transportation, and marketing. The disease usually develops after harvest when latent fungal infections become active, resulting in dark brown or black decay around the fruit stem. Although infection often begins before harvest, healthy and vigorous mango trees are generally more capable of producing fruits with better natural resistance. Streptomyces lydicus serves as an effective biological biofungicide that supports tree health by establishing a beneficial microbial population around the root system and promoting overall plant vigor.

After soil application through drenching, fertigation, or drip irrigation, Streptomyces lydicus rapidly colonizes the rhizosphere. It competes with harmful soil fungi for nutrients and space while producing natural antimicrobial metabolites that suppress several disease-causing microorganisms. This biological activity creates a healthier root environment, encouraging stronger root growth and improving water and nutrient absorption. As a result, mango trees develop robust canopies, healthier branches, and improved physiological balance that supports high-quality fruit production.

Healthy root systems play a crucial role in producing firm, well-developed fruits with improved shelf life. Balanced nutrient uptake supports uniform fruit growth, stronger skin development, and better overall fruit quality. While Streptomyces lydicus does not directly eliminate post-harvest pathogens on harvested fruits, maintaining healthy trees before harvest contributes to improved fruit quality and complements standard stem-end rot management practices such as orchard sanitation, proper pruning, balanced fertilization, careful harvesting, and recommended post-harvest treatments.

Streptomyces lydicus performs exceptionally well when combined with other beneficial microorganisms including Trichoderma, Bacillus spp., Pseudomonas fluorescens, and mycorrhizal fungi. These biological inputs create a diverse microbial ecosystem that continuously protects the root zone, improves soil fertility, and strengthens the tree throughout the growing season. Regular applications before flowering, during fruit development, and after harvest help maintain an active beneficial microbial population in the orchard.

For commercial mango growers targeting domestic and export markets, Streptomyces lydicus is a valuable biological input that supports sustainable fruit production. Its ability to improve root health, enhance nutrient efficiency, and strengthen overall tree vigor contributes to higher-quality fruits, better orchard productivity, and reduced dependence on repeated chemical soil fungicides. It is an ideal component of Integrated Disease Management (IDM), residue-conscious farming, and modern biological agriculture.