Pepino mosaic virus (PepMV) European (EU) strain, mild isolate Abp1 (PEPMVO)

This biological agent is a mild, low-virulence isolate of the European strain of Pepino mosaic virus (PepMV). Its mode of action is based on the principle of cross-protection, which is widely used in modern phytopathology to manage viral infections.

When applied to young plants, the virus of the mild Abp1 isolate infects the plant cells, triggering a mild immune response without causing significant damage to fruit quality or plant growth.

The specific immunity formed in this way prevents the subsequent infection and multiplication of more aggressive and pathogenic field strains of the Pepino mosaic virus.

The mechanism of biological protection mimics a vaccination process, where the mild strain occupies an ecological niche within the host organism, depriving dangerous strains of the opportunity to infect.

Using this method requires high levels of technical discipline, as the effectiveness of the protection depends heavily on the timing of the initial inoculation with the mild strain.

The primary purpose of using this isolate is to prevent losses caused by aggressive field strains of the Pepino mosaic virus, which can cause fruit deformation and reduced yields.

The product is used primarily on tomato crops grown in protected environments (greenhouses), where PepMV poses the greatest economic threat.

The preventive measure aims to protect against the loss of fruit quality (spotting, color changes, necrosis), which renders the produce unmarketable.

• Greenhouse tomatoes
• Hybrids susceptible to PepMV infection

Application of the product is strictly carried out during the seedling stage or the early development phase of the plants, before natural infection by the pathogen occurs.

The method of application involves artificial inoculation (application to leaves) or irrigation, according to the manufacturer's regulations developed for specific climatic zones.

Timing for the treatment must be synchronized with crop management practices to ensure uniform distribution of the inoculum throughout the planting area.

The exact concentration of the solution is determined by specialists based on planting density and the age of the seedlings, which is critical for successful vaccination.

Following the procedure, strict quarantine measures must be observed to eliminate the risk of the virus spreading to other crops or sensitive varieties.

It is forbidden to use the mild Abp1 isolate on healthy plants if there is no risk of aggressive strains appearing in a particular region or greenhouse facility.

Care must be taken to avoid any contact between the product and susceptible weeds of the Solanaceae family, which could act as a reservoir for the virus.

The product requires special storage conditions (usually at low temperatures) to maintain the viability of the viral particles and their mild virulence.

After treatment, routine disinfection of tools in the area of vaccinated plants should be avoided if such disinfection targets the destruction of viral particles.

The use of this mild isolate imposes restrictions on the choice of varieties, as not all tomato cultivars react equally to the Abp1 inoculation, requiring preliminary testing.