How to Manage Pests

Pests in Gardens and Landscapes

Big vein

Big vein disease is a viruslike disease that causes the veins in leaves to become very enlarged and clear. Such deformities are easily seen if the leaf is examined with the light source behind it. The enlarged veins cause the rest of the leaf to be ruffled and malformed.

Life cycle

Solutions

Lettuce big vein is caused by a viruslike agent vectored by the fungus Olpidium. There is little that can be done to manage it. Avoid fine-textured, poorly drained soils where big vein has been a problem. Do not overirrigate. Symptoms are not as severe if air temperatures are above 60 F, so a change in planting time can help. Some varieties may be more tolerant.

Clearing of tissue next to leaf veins
Clearing of tissue next to leaf veins


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

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