Chickpea stunt virus

The most characteristic symptom is severe stunting, where plants fail to reach their normal height and exhibit significant shortening of internodes.

Leaves often show signs of chlorosis, curling, and distortion, frequently turning pale green or yellow as the infection progresses.

Flowering is significantly reduced in infected plants, and any pods that do form are often underdeveloped or empty due to reproductive failure.

In cases of early-season infection, plants may appear bushier than normal due to excessive branching from the base of the stem.

The foliage may take on a bronze or reddish-yellow hue in some varieties, making the disease visible from a distance within a field.

Chickpea stunt virus is caused by a member of the Mastrevirus genus (family Geminiviridae), which systemically affects plant vascular tissues.

The virus particles contain single-stranded DNA and are transmitted to host plants via insect vectors in a persistent, circulative manner.

Leafhoppers are the primary vectors responsible for spreading the pathogen across chickpea fields during the growing season.

Once a leafhopper acquires the virus while feeding on an infected plant, it typically remains a vector for the rest of its life cycle.

This virus has a broad host range among legume crops, which complicates integrated pest management strategies in intensive agricultural regions.

The spread of the disease is highly correlated with the presence and population density of leafhopper vectors in the crop environment.

Warm, dry weather conditions tend to accelerate the life cycle of insect vectors, leading to rapid expansion of the disease within the field.

Weedy borders surrounding agricultural plots often serve as reservoirs where the virus can persist during the off-season months.

Proximity to perennial legume crops or older, infected chickpea plantings provides a constant source of inoculum for newly emerging seedlings.

Wind patterns can facilitate the movement of winged leafhoppers into healthy areas, creating new centers of infection across large landscapes.

Chickpea stunt virus causes severe yield losses, often resulting in complete crop failure in highly infested fields if left unmanaged.

Systemic infection disrupts the physiological processes of the plant, leading to poor grain filling and reduced quality of the harvested produce.

Field patches with stunted plants reduce the effective plant density, leading to increased competition and uneven ripening across the field.

Economic impact is amplified by the cost of chemical control measures required to keep the vector populations below the economic injury level.

The disease poses a long-term challenge to sustainability in chickpea-producing regions where the virus is endemic.

Sanitation is a critical management practice, involving the removal of weeds around fields to eliminate alternative host plants for the vectors.

Timely applications of systemic insecticides are necessary to manage leafhopper populations and minimize the spread of the viral agent.

Spatial isolation of new plantings from older crops is recommended to reduce the pressure from migratory insect vectors carrying the virus.

The most effective long-term solution is the development and adoption of chickpea cultivars with genetic resistance to Mastrevirus.

• Monitoring leafhopper populations using yellow sticky traps regularly.
• Destroying crop residues immediately after harvest to reduce overwintering sites.
• Adjusting sowing dates to avoid the peak flight period of insect vectors.