Frangipani mosaic virus

Frangipani mosaic virus is a serious plant pathogen belonging to the Tobamovirus genus. Much like other tobamoviruses, it is characterized by its high structural stability and extreme durability in the environment, allowing it to persist in soil and on surfaces for extended periods of time without losing infectivity.

The primary host for this virus is Plumeria (also known as Frangipani). Given the popularity of these ornamental trees in tropical and subtropical regions, the virus poses a significant challenge to nurseries and private collections that propagate the species through cuttings or grafting.

Infected plants typically display distinct mosaic patterns on their foliage, characterized by patches of chlorotic (yellowish) and green tissue. Other clinical symptoms include distorted or puckered leaves, stunted stem growth, and a noticeable reduction in the size and quantity of flowers, significantly impacting the aesthetic value of the specimen.

The transmission of this pathogen is primarily mechanical. It spreads easily when plant sap from an infected specimen comes into contact with the wounds of a healthy one. This often occurs during routine horticultural tasks, such as pruning, trimming, or propagation, where tools serve as the main vector for the virus if they are not properly sanitized.

There is currently no cure for the Frangipani mosaic virus, making strict biosecurity the only effective management strategy.

• Regular sterilization of all cutting tools using alcohol or bleach solutions.
• Strict isolation of any plant showing suspicious symptoms until a diagnosis is confirmed.
• Removal and safe disposal (burning or deep burial) of infected plants.
• Careful monitoring of the growing environment to ensure no sap-to-sap contact occurs between individual plants.