Bioformulated Endophytic Plant Probiotics for Enhancing Crop Growth and Disease Resistance

Background

Modern agriculture faces mounting pressure to increase crop yields while reducing reliance on synthetic agrochemicals. Fungal pathogens cause significant losses in staple and specialty crops, threatening food security and farm profitability. Conventional chemical fungicides, though effective, can lead to environmental contamination, non-target toxicity, pesticide resistance, and restrictions on their use in organic or high-value production systems such as hemp. There is an urgent need for sustainable, biologically based solutions that protect plants, maintain soil health, and meet regulatory and market demands for residue-free produce.

Existing biocontrol agents and microbial inoculants often suffer from inconsistent performance under field conditions due to poor viability during storage, sensitivity to temperature and moisture fluctuations, and challenges in establishing robust plant colonization. Many formulations degrade rapidly, exhibit limited shelf life, or fail to deliver sufficient numbers of active microbes to the root zone or foliage. Application methods such as seed coatings, soil drenches, or foliar sprays can result in uneven distribution and low survival rates upon pathogen attack. These limitations hinder reliable disease suppression, diminish crop resilience to stress, and compel continued dependence on chemical inputs.

Technology

This technology harnesses five endophytic bacterial strains that produce hydrolytic enzymes, phytohormones and antimicrobial metabolites to inhibit fungal pathogens and boost plant growth. In vitro, greenhouse and field trials demonstrated increased root and shoot biomass, elevated chlorophyll levels and improved drought tolerance versus untreated controls. Prototype formulations—carrier-based granules and liquid suspensions—preserve bacterial viability and enable early tissue colonization. Application methods including seed coating, soil drench and foliar spray have been optimized for delivery before pathogen exposure, yielding enhanced stability, extended shelf life and reliable performance.

The platform stands out for its multi-modal action, combining enzymatic pathogen suppression with hormonal stimulation and competitive colonization. Precision formulation and delivery ensure microbes establish before disease onset, unlike conventional biopesticides that often target a single mechanism. By integrating disease control and growth promotion, this approach reduces reliance on chemical inputs and is especially suited to organic and hemp production. Supported by USDA grants and moving from prototype to field trials, it offers a scalable, environment-friendly solution with higher efficacy metrics and strong commercial potential.

Benefits

• Enhanced plant growth and yield through increased root and shoot biomass
• Improved drought tolerance for greater crop resilience
• Effective suppression of fungal pathogens via antimicrobial metabolites
• Higher chlorophyll content for healthier, greener plants
• Long-term formulation stability with superior shelf life
• Flexible application methods (seed coating, soil drench, foliar spray) for optimized delivery
• Reduced reliance on chemical pesticides, supporting organic agriculture

Applications

• Organic crop yield enhancer
• Biopesticide for fungal control
• Drought tolerance seed treatment
• Soil drench plant probiotic
• Foliar probiotic spray

Additional info

A consortium of five endophytic bacterial strains has been isolated and characterized for hydrolytic enzymes, phytohormone synthesis, and antimicrobial metabolite production. Prototype carrier-based granules and liquid suspensions preserve viability and enable seed coating, soil drench, or foliar spray delivery. Trials show increased root and shoot biomass, chlorophyll content, drought tolerance, and fungal pathogen suppression. Formulations ensure early tissue colonization, extended shelf life, and superior stability and efficacy over existing biopesticides.