Indian peanut clump virus

Indian peanut clump virus (Pecluvirus indicum) is a significant soil-borne plant pathogen that causes severe viral disease in agricultural crops. As a member of the Pecluvirus genus, it affects the physiological processes of the host plant, leading to significant stunted growth and disruption of essential metabolic pathways. The virus is known for its ability to persist in the environment for extended periods.

The primary host for this virus is the groundnut (peanut), which is highly susceptible to the pathogen. The infection affects different stages of plant development, starting from seedling emergence. When crops are infected early in the season, the economic impact is most severe, often resulting in complete yield failure in heavily infested patches of the field.

Symptoms of the infection typically include severe stunting, leaf discoloration characterized by mosaic patterns, chlorosis, and crinkling. Affected plants often appear in irregular patches within the field, reflecting the localized distribution of the soil-borne vectors. The inability of the plant to develop a healthy root system and productive pods is a hallmark of this viral infection.

The transmission of Pecluvirus indicum occurs primarily through soil-inhabiting vectors, specifically polymyxa-like organisms. These vectors carry the virus and transmit it to plant roots during infection. Environmental factors, such as high soil moisture and specific temperature ranges, play a crucial role in the lifecycle of the vector, thereby influencing the speed and severity of the disease spread in the field.

Managing this viral disease is challenging due to its soil-borne nature. Effective control strategies include:

• planting resistant or tolerant peanut varieties;
• implementing long-term crop rotation schemes to decrease vector populations;
• using soil fumigation techniques in high-risk areas;
• maintaining strict field hygiene to prevent the movement of contaminated soil;
• monitoring for early signs of stunting and mosaic to isolate affected areas.