Tomato ring is a fungal disease that affects tomatoes and other related plants, caused by the Tomato ringspot virus (ToRSV). It primarily manifests as a series of yellow or light green concentric rings on the leaves, fruits, and stems of tomato plants, leading to distorted growth, reduced yield, and compromised fruit quality. The symptoms may appear as spots or rings resembling a bullseye, with the disease progressively spreading throughout the plant.

Tomato ringspot virus is typically transmitted by nematodes, tiny soil-dwelling worms that feed on the roots of plants. Infected nematodes introduce the virus into the plants during feeding. The virus can also spread through contaminated tools or plant material. Once a plant is infected, the virus interferes with normal cellular processes, stunting growth and causing the characteristic ring-like markings.

In addition to affecting leaves and fruits, the disease often leads to deformed or underdeveloped fruit, which can negatively impact the marketability and overall yield of tomato crops. The rings on the fruits are particularly problematic as they reduce the visual appeal, making them less desirable for consumers.

Managing tomato ringspot involves a combination of preventive and cultural practices. Planting virus-resistant tomato varieties can help reduce the risk, as can practicing crop rotation to minimize nematode populations. Proper sanitation, such as cleaning gardening tools and removing infected plant material, also helps limit the spread of the virus. In areas where nematodes are common, using nematicides or introducing natural predators to control their population can further help manage the disease.

Tomato ringspot is a serious concern for both home gardeners and commercial tomato growers, as it can significantly reduce crop yield and quality, making proper management essential