Natural Infection of Field-Grown Daikon Radish (Raphanus sativus L.) Crops by Turnip Crinkle Virus in North America

In 1993, stunted field-grown daikon radish plants were found with black lesions on the petioles and leaf blades, and new growth exhibited leaf crinkling and a mosaic pattern on distorted leaves. The plants had hollow roots and seed production was severely reduced. Symptomatic plants contained isometric virions identified as those of turnip crinkle virus (TCV). This is the first report of TCV causing serious economic damage and the first report of natural infection in North America