Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org

Close up of affected plant. No specific causal agent was confirmed beyond symptoms being consistent with phytoplasmas generally. August 1997

Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo, Bugwood.org

Close up of vine terminal showing bunching of leaves & blossoms. No specific causal agent was confirmed beyond symptoms being consistent with phytoplasmas generally (cv. Athena). August 1997                                                     

Howard F. Schwartz, Colorado State University, Bugwood.org

Carrot roots with phytoplasma symptoms in the field.

Howard F. Schwartz, Colorado State University, Bugwood.org

A lettuce plant with symptoms of a phytoplasma infection in the field.

Howard F. Schwartz, Colorado State University, Bugwood.org

A lettuce plant with symptoms of a phytoplasma infection in the field.

Howard F. Schwartz, Colorado State University, Bugwood.org

Onion bulbs with symptoms of a phytoplasmic infection.

Howard F. Schwartz, Colorado State University, Bugwood.org

An onion flower head with a phytoplasmic infection in the field.

Howard F. Schwartz, Colorado State University, Bugwood.org

A carrot plant with symptoms of a phytoplasmic infection growing in the field.