Cause Wisteria vein mosaic virus has been reported from Washington and observed in Oregon. The disease has been observed in nurseries and home landscapes. As a potyvirus, an aphid is expected to be a vector of this disease. Vegetative propagation of infected plants, however, will easily spread the disease.
Symptoms Mild mosaic mottling, chlorotic spots, necrotic flecks, and distortion or twisting of leaflets have been noted. These symptoms were observed only in young leaves, whereas mature leaves showed no apparent symptoms. The disease does not seem to reduce the vigor of infected plants.
Cultural control
- Select and plant only virus-tested (and found to be free of all known viruses) stock.
- Rogue out and destroy affected plants.
Reference Naidu, R. A. and Karthikeyan, G. 2008. First Report of Wisteria vein mosaic virus in Wisteria sinensis in the United States of America. Plant Health Progress, 9:42. doi:10.1094/PHP-2008-0818-01-BR.