Brugmansia potyvirus

Brugmansia potyvirus (Potyvirus brugmansiae) is a significant viral pathogen within the Potyviridae family that primarily affects plants of the Brugmansia genus. As a systemic disease, it causes chronic infection that spreads throughout the vascular system, leading to long-term decline in plant vigor and aesthetic value.

The virus primarily impacts solanaceous ornamental plants. While its primary host is the genus Brugmansia, the virus can persist in other related species or within nursery stocks. Because it is highly persistent, even mild infections can become a source of inoculum for other susceptible plants in close proximity.

Symptoms typically manifest as mosaic patterns on foliage, characterized by patches of light and dark green coloration. Other indicative signs include chlorotic ringspots, vein clearing, leaf deformation, and stunted growth. In more severe cases, flower production is affected, often resulting in color breaking or deformed blooms that significantly impact the plant's ornamental potential.

Transmission occurs through various vectors, most notably aphids, which transmit the virus in a non-persistent manner during sap-feeding. Mechanical transmission is another critical pathway, especially in nursery settings where pruning shears, knives, and other propagation tools can transfer the virus from infected to healthy plants if not properly sterilized between uses.

Managing Brugmansia potyvirus requires an integrated approach because there are no curative treatments for viral infections in plants. Management strategies focus on strict prevention: using virus-indexed propagation material, implementing rigorous pest control programs to reduce aphid populations, and maintaining clean tools. Any plants displaying persistent mosaic or deformation should be promptly rogued out to mitigate further spread in the greenhouse or landscape.