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UC IPM Home > Homes, Gardens, Landscapes, and Turf > Trees and Shrubs > Diseases
How to Manage Pests
Pests in Gardens and Landscapes
Wisteria vein mosaic virus
Wisteria vein mosaic virus discolors foliage of Wisteria spp. shrubs and vines.
Identification
Common symptoms of virus infection in wisteria are vein clearing (yellowing or whitening) and yellow flecking, mottling, or mosaic of irregular size and shape adjacent to or around leaf veins. Leaflets may be somewhat distorted, such as wrinkled or twisted laterally.
Life cycle
The virus is transmitted mechanically and by grafting. It can be introduced into landscapes on new plants that were infected during their production. Other wisteria can become infected by mechanical inoculation if infected sap is moved on cutting tools. Once a plant becomes infected with virus, it usually remains infected throughout its life.
Damage
Aside from discoloring foliage, the virus does not seriously harm wisteria or significantly reduce the vigor of infected plants.
Solutions
There is no cure or treatment for virus-infected plants in landscapes, and generally none is needed for woody ornamentals. For more information, see Viruses. |
Wrinkled, yellowish mottled leaflets
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