Okra mottle

Okra mottle is a significant viral disease caused by the Okra mottle virus (OMoV), which is classified under the genus Begomovirus. This pathogen is known for its high transmission efficiency, leading to widespread infection in susceptible hosts, particularly in regions with warm and humid climates.

The primary host for this virus is okra (Abelmoschus esculentus), but the virus also poses a threat to other crops, including soybeans (Glycine max). Its ability to infect multiple plant species makes it a persistent challenge in agricultural systems where different crops are rotated or intercropped.

Key symptoms of the disease include mosaic-like patterns on leaves, interveinal chlorosis, and crinkling. Affected plants usually exhibit stunted growth, reduced leaf size, and a significant decrease in flowering and pod formation, which directly impacts the overall harvest quantity.

The disease spread is primarily vector-mediated, with the whitefly Bemisia tabaci serving as the main transmission agent. The virus is acquired by the whitefly during feeding on infected plants and is subsequently transmitted to healthy plants. Factors like high temperature and dry spells favor the proliferation of whitefly populations, accelerating the spread of the virus.

Effective management and prevention strategies include:

• Using resistant or tolerant crop varieties if available.
• Implementing rigorous whitefly population management through chemical and biological controls.
• Regular scouting and removal of infected plants to reduce primary inoculum.
• Maintaining field hygiene and controlling weed reservoirs that host the virus.