Yellow mosaic of jute

The virus is a single-stranded DNA virus that invades the plant vascular system, specifically targeting the phloem tissue.

Transmission occurs primarily through the whitefly (Bemisia tabaci), which acts as a persistent vector for the viral particles.

Once a whitefly acquires the virus by feeding on an infected plant, it remains capable of transmitting the pathogen throughout its lifespan.

The systemic nature of the virus leads to rapid colonization of the entire plant structure following the initial inoculation by the vector.

The first symptoms appear on young leaves as bright yellow patches, which gradually expand into a characteristic mosaic pattern.

Leaves often become distorted, wrinkled, or reduced in size, which directly interferes with the plant's overall development.

Infected jute plants exhibit significant stunting, with shortened internodes that create a bushy or rosetted appearance in severe cases.

Chlorosis becomes more pronounced as the disease progresses, eventually covering large portions of the leaf blade and hindering photosynthesis.

In field conditions, the disease usually appears in localized clusters or "patches," correlating with the activity centers of the whitefly population.

The spread of the disease is heavily dependent on the population density of the whitefly, which thrives in warm and dry environmental conditions.

High temperatures and moderate humidity are ideal for both the reproduction of the insect vector and the replication of the virus.

Weed hosts in the surrounding area serve as important reservoirs for the virus, allowing it to survive between cropping seasons.

Late planting often leads to higher infection rates because the plants are at their most susceptible stage during the whitefly peak activity season.

Improper field management, such as continuous monocropping without rotation, significantly increases the risk of soil-borne or residue-based reinfection.

Yellow mosaic of jute causes substantial losses in fiber yield, as the infected plants fail to reach their full biomass potential.

The quality of the fiber is severely compromised; it often becomes weak, coarse, and brittle, making it less suitable for industrial processing.

The physiological stress caused by the virus results in premature leaf drop and overall plant weakness, reducing the total yield per hectare.

In epidemic years, losses can be devastating, significantly impacting the income of farmers reliant on jute as a cash crop.

The disease weakens the plant's defense mechanisms, making it more susceptible to secondary fungal or bacterial infections.

The most effective strategy for managing the disease is the cultivation of resistant or tolerant jute cultivars developed through breeding programs.

Integrated Pest Management (IPM) practices, specifically targeting the whitefly population with insecticides, are essential to break the disease cycle.

Maintaining clean fields by removing potential host weeds helps to eliminate the primary sources of viral inoculum.

Adopting appropriate planting schedules allows growers to avoid the periods when whitefly populations are at their seasonal peak.

• Regular monitoring of fields using yellow sticky traps for whitefly detection.
• Crop rotation with non-host species to interrupt the lifecycle of the pest.
• Prompt roguing and destruction of symptomatic plants to reduce the spread.
• Using certified, high-quality, virus-free seeds for every planting cycle.