Streptomyces Lydicus for Collar Rot in Mango

Collar rot is a destructive soil-borne disease that affects the region where the trunk meets the soil surface. The disease is commonly associated with fungal pathogens such as Phytophthora, Fusarium, Rhizoctonia, and other opportunistic fungi that thrive in poorly drained or continuously wet soils. Infected mango trees often show bark discoloration, cracking near the collar region, gum exudation, yellowing leaves, poor canopy growth, branch dieback, and gradual decline in productivity. Without timely management, severe infections may lead to partial girdling of the trunk and eventual tree death. Streptomyces lydicus offers a biological approach to strengthening the root environment and supporting natural disease suppression.

When introduced into the soil through drenching, fertigation, or drip irrigation, Streptomyces lydicus rapidly colonizes the rhizosphere and root collar region. The beneficial microorganism competes with disease-causing fungi for nutrients and space while producing naturally occurring antimicrobial metabolites that help suppress several soil-borne pathogens. This biological activity promotes a balanced microbial ecosystem that protects the root zone and encourages healthy root development.

Healthy roots are essential for maintaining strong trunk growth, vigorous canopy development, and continuous fruit production. Streptomyces lydicus improves nutrient absorption, enhances water-use efficiency, and promotes the development of feeder roots. A well-developed root system enables mango trees to better tolerate environmental stress such as drought, waterlogging, transplant shock, and fluctuating soil conditions. Stronger trees are naturally more capable of recovering from disease pressure and maintaining consistent flowering and fruit set.

For effective collar rot management, Streptomyces lydicus should be used as part of a comprehensive Integrated Disease Management (IDM) program. Proper orchard drainage, avoidance of water stagnation, sanitation, balanced fertilization, and timely monitoring are essential management practices. The biofungicide is compatible with other beneficial microorganisms such as Trichoderma, Bacillus spp., Pseudomonas fluorescens, Paecilomyces lilacinus, and mycorrhizal fungi. Together, these beneficial microbes establish a biologically active soil ecosystem that supports long-term orchard health.

Commercial mango growers increasingly rely on Streptomyces lydicus because it provides sustainable, environmentally friendly, and residue-free biological disease management. Regular application helps maintain healthier root systems, improves soil microbial diversity, supports stronger trees, and contributes to better fruit yield and quality while reducing dependence on repeated chemical fungicide applications.