Fig Mosaic Disease

Fig mosaic virus

2 host plants · Viral

Last updated

Data Maturity Baseline

This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.

You see mosaic patterning or mottle on common fig leaves, especially if trees were collected from unknown sources. Fig mosaic, likely viral, circulates between fig trees through grafting and propagation. Use only certified, virus-tested planting stock. Symptoms may be subtle and cause little real damage in mild climates.

There is no cure for viral diseases. Remove and destroy infected plants to prevent spread to healthy ones nearby. Many viruses spread through insect vectors like aphids and leafhoppers, so managing those populations helps slow transmission. When replacing removed plants, choose virus-resistant varieties if available and purchase certified virus-free stock from reputable nurseries.

Quick Reference

Agent Type
viral
Causal Agent
Fig mosaic virus
Host Plants
2
Favorable Conditions
Symptoms develop 3-8 weeks after initial infection, appearing as leaf chloros...

Management

Vulnerability Window

Young fig trees are most vulnerable to initial mite-transmitted infection. Trees are vulnerable to Aceria ficus-mediated transmission during active growth periods (spring through fall) when mite populations are highest. Pruning creates fresh wounds vulnerable to mechanical transmission year-round. Trees remain vulnerable to reinfection throughout their lifespan.

What Triggers Infection

Symptoms develop 3-8 weeks after initial infection, appearing as leaf chlorosis, mosaic or mottling patterns, leaf deformity, and distortion. Fruit from infected branches may drop prematurely. Symptom severity varies by cultivar and virus strain - some infected trees remain asymptomatic or show only mild symptoms. Symptoms are more pronounced on younger leaves and shoots. Many infected trees remain productive despite systemic infection for years.

Cultural Controls

  • Use virus-tested, mite-free fig plants from certified nurseries. Inspect incoming trees for Aceria ficus mites before planting. Disinfect pruning tools with 10% bleach solution or 70% ethanol between trees to prevent mechanical transmission. Prune during cooler months when mite populations are lower. Remove and destroy severely infected trees if disease is detected early in orchard establishment. Avoid planting infected trees near healthy plantings. Some fig cultivars show greater tolerance to FMV than others. Source: Wikipedia; PNW Plant Disease Management Handbook

Host Plants (2)