Crown and root problems, fungal leaf disease and wisteria pests such as the wisteria borer are among the plant's most common problems. Crown and root problems include crown galls, cankers, root rots and graft failures. Commonly known fungal leaf diseases are powdery mildew and leaf spot. The wisteria borer is a tiny beetle that bores tunnels into the woody parts of the vine.Continue Reading
Crown and root problems can cause the plant to slowly wilt or fail. Root rots occur when plants are kept in constantly water-logged conditions. This condition is preventable and treatable in young plants. Younger plants may also survive grafting failures.
Fungal leaf disease can be controlled by removing the affected leaves. Signs of leaf disease include small, yellow spots or a white, fuzzy coating. Pruning the wisteria to allow for better air flow helps prevent fungal leaf disease.
The wisteria borer presents the largest pest problem for the plant. Control is difficult, and borers can kill wisteria if they manage to travel across the transport tissues. If this happens, the plant may become severed from the roots. Wisteria with a few borer tunnels can be treated by inserting a stiff wire into the tunnel's path and removing the eggs. If the wisteria has many tunnels, remove the diseased plant and start anew.Learn more about Outdoor Plants & Flowers