WSU Extension

Hortsense

Lettuce
 
Disease
Anthracnose 
Aster yellows 
Beet western yellows virus 
Bottom rot 
Damping-off 
Downy mildew 
Lettuce big vein virus 
Insect
Aphids 
Slugs 



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Lettuce : Beet western yellows virus
(revision date: 6/3/2014)


Biology
Beet Western Yellows is a virus which affects many garden plants and weed species. The virus is transmitted by aphids, including the green peach aphid. Older leaves are affected first. Yellowing begins at the margin and progresses inward, with the veins typically remaining green. The disease results in reduced, abnormal growth of the plants. Symptoms tend to be worse when unfavorable conditions such as poor nutrition or poor root development are also present.
Management Options


Non-Chemical Management
  • Plant tolerant varieties such as 'Salinas'.
  • Controlling weeds in and around the garden may help reduce the overwintering virus reservoir.
  • Aphid control is ineffective in preventing disease, as the virus is easily spread by only a few aphids.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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