Leafroll

Leaves roll downward and become thick and brittle, a characteristic virus symptom most visible on new spring growth of infected plants. No cure exists for viral infection; remove infected plants entirely to prevent spread to nearby healthy stock. Use only certified virus-free planting material from reputable nurseries for all new plantings to prevent introduction.

Start with cultural controls: remove infected tissue, improve drainage and air circulation, and keep foliage dry when possible. Leafroll responds best to early intervention, so scout regularly during the growing season and act at the first sign of symptoms. Chemical controls exist for severe cases but work best as preventive treatments before infection takes hold.