Cucumber golden mosaic

Pathogen and disease type. The causative agent of this disease is the Aureusvirus cucumis virus. It is a viral pathogen that primarily affects the vascular system of plants. This disease is systemic, meaning the virus spreads throughout the plant tissues, leading to metabolic disruption and a severe decline in the overall physiological health of the crop.

Affected crops. The disease primarily affects cucumber plants, although it can also infect other members of the Cucurbitaceae family, such as melons, squashes, and pumpkins. Weeds belonging to the cucumber family often act as natural reservoirs for the virus, allowing it to survive during the off-season and spread to new plantings.

Symptoms and signs of infection. The primary symptoms include chlorotic spotting and a distinctive bright yellow or "golden" mosaic pattern on the leaves. As the infection progresses, leaves become crinkled and stunted. Fruits from infected plants often display yellow mottling, surface deformation, and poor development, making them unfit for market use.

Conditions of development and harmfulness. Transmission of the virus occurs via mechanical contact (through contaminated tools or human handling) and by insect vectors, primarily aphids. Warm temperatures and high humidity promote the activity of these vectors. The harmfulness is manifested in significantly reduced yields and poor fruit quality, which can lead to substantial financial losses for growers.

Protection and prevention measures. As there are no curative chemical treatments for Aureusvirus cucumis, prevention is the only viable management strategy:

• Strict sanitation and removal of infected plants from the field.
• Regular disinfection of tools and equipment to prevent cross-contamination.
• Integrated pest management (IPM) to control aphid populations.
• Selection of resistant or tolerant crop varieties.
• Good weed control to eliminate alternative hosts.