Broccoli mosaic virus disease: inoculated leaves are generally asymptomatic. The diseased leaves first show bright veins, then turn into green veins and flowers, with black ring spots on the leaves and protrusions on the back of the leaves. Some pulse conditions persist and become chronic symptoms (wide bends). &; . Tinsley, 1953). At high temperature, symptoms can disappear. Turnip mosaic virus disease: under cold conditions, some inoculated leaves appear local chlorosis spots. Systemic symptoms first have a pulse, and then subside, resulting in pigmentation.