Bacteriophages against Clavibacter michiganensis subsp. michiganensis

Bacteriophages against Clavibacter michiganensis subsp. michiganensis are biological control agents used in modern plant pathology to manage bacterial canker in tomatoes. This active substance consists of highly specific viruses that infect and kill only targeted bacterial cells, functioning as a sustainable and environmentally friendly alternative to traditional copper-based bactericides.

The mechanism of action is based on the "lock and key" principle. The phage attaches to the specific surface receptors of the host bacterium, injects its genetic material, and hijacks the host's machinery to replicate itself. Once the cycle is complete, the bacterial cell lyses and dies, releasing new phages into the immediate environment to continue the cycle of infection against the pathogen.

This treatment is primarily applied to tomato crops, which are highly susceptible to Clavibacter michiganensis subsp. michiganensis, a pathogen that causes systemic vascular wilting, leaf spotting, and fruit blemishes. By suppressing the population density of this pathogen on plant surfaces and in the phyllosphere, bacteriophages significantly reduce the incidence of disease outbreaks.

Application procedures require careful attention to environmental conditions. Since bacteriophages are sensitive to UV light and high temperatures, foliar applications are recommended during early morning or late evening hours. Consistent application intervals are critical during the vegetative growth stage to ensure that the phage concentration remains high enough to manage new infection attempts by the pathogen.

Safety measures for using bacteriophages are minimal as they are non-toxic to plants, humans, animals, and beneficial insects like bees. Because the substance is biological, it leaves no chemical residues on the fruit, making it ideal for organic agriculture. Proper storage conditions, such as maintaining a stable, cool temperature, are essential to ensure the shelf life and infectivity of the phage particles.

• Highly targeted activity: no disruption to beneficial soil microbiome.
• Safe for consumption; no residues left on harvested vegetables.
• Effective in managing antibiotic-resistant bacterial strains.
• A core component for integrated pest and disease management programs.