A VIRAL DISEASE OF BROAD BEAN CAUSED BY A NON-APHID-TRANSMISSIBLE STRAIN OF TURNIP MOSAIC-VIRUS

A viral disease of broad bean (Vicia faba) was observed in Jiangsu, Zh ejiang and Sichuan Province, the People's Republic of China. Its typic al symptom on infected leaves was a white mottle, and, rarely, red nec rotic lesions on several broad bean cultivars. A non-aphid-transmissib le strain of turnip mosaic virus (TuMV) was identified as the causal a gent of the disease on the basis of biological properties, particle mo rphology, seed and aphid transmission and serological tests. The virus could not be transmitted by aphids in the non-persistent manner.