Symptoms appear as light and dark green mottled areas on leaves. Plants infected early in their development are stunted and have a yellowish cast. Symptoms may vary depending on virus strain, time of infection, variety, and environmental conditions. In hot weather, symptoms may not be as obvious although plants remain infected. Certain strains of TMV can cause dark, longitudinal streaks of varying lengths on stems.
Affected stems are brittle and appear brown internally.
TMV can reduce size and number of fruit produced. The earlier a plant becomes infected, the greater the loss. Fruit usually do not show any malformation. Occasionally, mottling, bronzing, and internal browning of fruit occur. Internal browning is evident on mature but unripened fruit.