This 2-page fact sheet discusses tobacco mosaic virus (TMV), tomato mosaic virus (ToMV) and pepper mild mottle virus (PMMV), their host plants and the symptoms they cause, how they survive and spread and the options for managing these diseases. These viruses are highly infectious and easily spread by contact. They can be carried on seed and can survive for long periods in crop debris and on contaminated equipment and clothing. Healthy seedlings and strict hygiene form the basis of effective management. Note that the application of insecticides does not control tobamoviruses.