Napa cabbage is a type of Chinese cabbage originating near the Beijing region of China that is widely used in East Asian cuisine.6.4 Virus diseases. 6.5 Insect pests. But you don’t hear as much about mosaicviruses – especially when it comes to certain brassicas, like cabbages. The truth is that mosaicviruses are really common. So what does mosaicvirus in cabbage look like exactly? Generally speaking, cabbagemosaicvirus presents itself as follows: Yellow rings begin to form on the young leaves. CabbageMosaicVirus: A viral disease that causes stunted growth, mottled or mosaic-like discolouration on leaves, and reduced quality of cabbage heads. RESISTANT VARIETIES Resistant varieties of Chinese cabbage are available, but none are resistant to all of the several strains of Turnip mosaicvirus that exist. Resistant cultivars. In areas where Turnip MosaicVirus is serious and endemic, growing of Danish cabbage varieties should be considered. Torget, R., Lapi, L. and Cohen, S.S. (1979). Synthesis and accumulation of polyamines and S-adenosylmethionine in Chinese cabbage infected by turnip yellow mosaicvirus. MosaicViruses*. Pharmacology*. Plant Viruses*. Radiation Effects*. 1978. Resistance in chinese cabbage to turnip mosaicvirus. Plant Dis. Reptr. 62:660-662. The Mexican scientists looked for genetic traces of the cabbagemosaicvirus, which is used to carry modified DNA sequences into plants.