Rhynchosia begomovirus

As the infection progresses, affected plants show significant leaf deformation, including curling, puckering, or wrinkling.

Stunting is a common characteristic, with infected plants exhibiting severely reduced height and overall biomass.

A notable decline in floral development is often observed, frequently leading to blossom drop and poor pod set.

Advanced stages of the disease manifest as tissue necrosis and premature wilting, often leading to total plant failure.

The pathogen is a virus belonging to the genus Begomovirus within the family Geminiviridae.

It contains a circular single-stranded DNA genome, which is the hallmark of the geminivirus group.

The virus is primarily transmitted by the silverleaf whitefly (Bemisia tabaci) in a persistent, circulative manner.

The virus particles are localized in the plant phloem, disrupting the transport of nutrients throughout the organism.

The high genetic variability of begomoviruses presents a continuous challenge for developing resistant plant varieties.

Disease outbreaks are typically favored by hot and dry weather conditions, which promote the proliferation of insect vectors.

High populations of whiteflies within and around the field are the primary drivers for viral spread.

Weed hosts in the family Fabaceae serve as crucial reservoirs for the virus, bridging the gap between crop seasons.

Migration of viruliferous insects from wild host plants to agricultural fields significantly increases infection rates.

Poor agricultural practices, such as lack of weed management, facilitate the establishment of the virus in the environment.

The virus is highly damaging to legume crops, causing significant yield losses in terms of both quality and quantity.

Reduced photosynthetic efficiency due to chlorosis results in lower nutrient storage in seeds and fruit.

Infection during the early growth stages can completely inhibit the reproductive potential of the plant.

Increased susceptibility to secondary pathogens and environmental stress is often a secondary consequence of viral infection.

Financial losses occur not only from yield reduction but also from the increased cost of insecticide applications.

Effective management requires rigorous monitoring and control of the whitefly population using targeted insecticides.

Establishing spatial isolation between production fields and known virus reservoirs is essential for long-term control.

The use of virus-free, certified planting material is the most effective preventative measure available to farmers.

Stringent weed control within and around the fields eliminates the natural breeding grounds of the vector.

• Utilizing yellow sticky traps to monitor and reduce adult whitefly populations.
• Implementing crop rotation cycles to break the transmission chain.
• Applying plant resistance inducers to enhance natural defense mechanisms.