Chickpea bushy stunt

Chickpea bushy stunt is a viral plant disease caused by the Chickpea bushy stunt virus (CBSV). This pathogen is a member of the Tombusviridae family, known for its ability to cause severe systemic infections in various legume species, primarily affecting the vegetative development and yield potential of chickpea plants.

The most common symptoms include extreme stunting and intense proliferation of lateral branches, which gives the plant a bushy appearance. Infected plants often exhibit chlorosis or reddening of leaves, severe malformation, and a significant reduction in flower production, leading to total yield loss in early-infected plants.

The biological cycle of the virus is primarily mediated by insect vectors, most notably aphids. These insects acquire the virus by feeding on infected plants and subsequently transmit it to healthy ones during their feeding cycles. The virus persists in reservoir hosts, including various weeds and perennial plants surrounding the agricultural fields.

Environmental conditions that favor the proliferation of insect vectors are critical for the spread of the disease. Warm, dry weather following a period of moderate precipitation often facilitates the rapid build-up of aphid populations, which in turn leads to faster dissemination of the virus throughout the crop field.

The economic impact of this pathogen is severe, as there are no direct chemical treatments to cure the virus once the plant is infected. Management strategies must be preventative, focusing on:

• using certified healthy seed material;
• controlling weed populations in and around fields;
• monitoring for aphid vectors;
• applying timely systemic insecticides.