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The viruses of this genus resemble the Tobacco rattle virus. They cause ringspot, mottle, mosaic and other diseases diseases on various plants. Often solanaceous and leguminous crops like potato, tobacco, peas and beans are infected. The viruses are stable in sap for several months and are transmissible by sap and through nematodes in the soil.
Two types of tubular particles are produced, each containing positive stranded ssRNA (RNA1 and RNA2). A longer type (180-220 nm) is infective. The much shorter type (46-115) is not infective and codes for the virus coat protein. In some strains a small amount of still shorter particles is also produced.
Currently, the following species have been entered into the system: