Spots turn red. Caused by the bean yellow mosaic virus. Produces angular light and dark green mottling of leaves and flower stems. Virus is transmitted by aphids. Flower parts remain green and fail to form normal color pigment.
Plants turn yellow and degenerate prematurely.
Caused by the cucumber mottle virus. Causes flowers to be blotched, open slowly and fade early. Plants are stunted. Caused by the tobacco ring-spot virus. Ring spots appear on leaves but flower parts are not affected.