Abstract
A new strain of TMV was isolated from both commercial seeds of sweet pepper cv. Tosa-Green and seedlings of sweet pepper cv. Shin-Sakigake showing mild mosaic in Chiba Prefecture. The mosaic symptom and local lesions were developed on the respective TMV-sensitive and resistant cultivars of sweet pepper infected with the virus but the virus was never infectious to tomatoes. Since it was serologically different from any of ordinary, tomato and pepper strains of TMV, it was designated as TMV-U.
