Botrytis gray mold virus

Botrexvirus ecsbotrytis is a distinct viral pathogen responsible for systemic infections in various vegetable and berry crops. Unlike fungal Botrytis species, this virus alters the host's cellular defense mechanisms, predisposing plants to secondary infections. As a systemic pathogen, it complicates traditional crop protection efforts, requiring specialized strategies to manage viral spread within agricultural systems.

The primary hosts for this virus include members of the Solanaceae family, such as tomatoes, peppers, and eggplants, as well as several ornamental species. The virus infects all plant organs, concentrating in the phloem, which facilitates rapid systemic movement from the point of initial infection to the growing points of the plant, roots, and developing fruits.

Symptoms of Botrexvirus ecsbotrytis infestation often mimic nutrient deficiencies or fungal blight. Key indicators include chlorotic spots, mosaic patterns on leaves, leaf curling, and stunted development. Infected fruits often exhibit abnormal coloration, reduced size, and a significant decrease in post-harvest shelf life due to compromised tissue structural integrity.

Viral development is favored by mild temperatures and high humidity levels, conditions commonly found in greenhouse environments. Transmission occurs primarily through insect vectors like aphids and thrips, which acquire the virus while feeding on infected sap. Additionally, mechanical transmission by human activities, particularly pruning and harvesting with contaminated tools, is a critical factor in rapid field spread.

Economic damage caused by the virus is substantial, leading to yield loss and marketability reduction. Management strategies are focused on the following:

• Implementing strict integrated pest management (IPM) to control insect vectors.
• Utilizing pathogen-free certified seeds and transplants.
• Sanitizing pruning tools frequently with validated antiviral disinfectants.
• Roguing symptomatic plants immediately to prevent the virus from becoming a reservoir.
• Applying preventive measures such as crop rotation and the use of resistant crop varieties.