Chickpea stunt

Chickpea stunt is a destructive viral disease that severely hinders the growth and productivity of chickpea plants. The disease is characterized by a significant reduction in plant height and a failure to produce normal yields, making it a critical threat to legume production in many regions.

The disease is primarily caused by phloem-limited viruses, most notably the Bean leafroll virus (BLRV), which is a member of the Luteoviridae family. Transmission of the virus occurs in a persistent manner, meaning that the vectors must feed on an infected plant for a certain period to acquire the virus and then transmit it to a healthy host during subsequent feeding events.

Symptoms of Chickpea stunt typically become apparent during the early growth stages. Infected plants exhibit extreme stunting of internodes, upward leaf curling, and yellowing or reddening of the foliage. The development of pods is usually inhibited, or the pods remain small and contain only shriveled seeds, leading to a total loss of commercial value for the affected plants.

The spread of the disease is heavily dependent on the ecology of its aphid vectors. When environmental conditions favor aphid colonization, such as mild temperatures and the availability of alternative hosts, the incidence of the disease increases significantly. Weeds and perennial legumes acting as reservoir hosts play a vital role in maintaining the virus throughout the year.

Management practices focus on limiting vector transmission and minimizing contact with inoculum sources. This includes the implementation of appropriate sowing dates to avoid peak aphid migration, the removal of infected host plants, and the use of insecticides to control aphid populations in and around the crop fields. Breeding for genetic resistance remains the most sustainable long-term strategy for managing the disease.