How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Mosaic viruses

For the most part, mosaic viruses that infect potatoes are transmitted by aphids. They feed on the sap of infected plants and transmit the virus to healthy plants. Nearby weeds may also serve as alternate hosts for the virus. Potato tubers are probably the primary overwintering reservoir of these viruses. Other viruses with no known insect vector may be carried in tubers and transmitted mechanically by machinery, root-to-root contact, sprout-to-sprout contact, or seed-cutting equipment.

Plant infected with potato mosaic virus
Plant infected with potato mosaic virus


Statewide IPM Program, Agriculture and Natural Resources, University of California
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