WSU Extension

Hortsense

Pepper, Eggplant
 
Disease
Curly top (Western yellow blight) 
Mosaic viruses 
Physiological leaf roll 
Verticillium wilt 
Insect
Brown marmorated stink bug 
Flea beetles 
Whitefly 



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Caption: Curly top virus symptoms on bean
Photo by: G.Q. Pelter
  
Pepper, Eggplant : Curly top (Western yellow blight)
(revision date: 6/3/2014)


Biology
Curly top is caused by a virus transmitted by the beet leafhopper. Many crops are affected, including tomato, bean, squash, cucumber, and pepper. Typical symptoms of the disease include puckering and downward curling of leaves, followed by a general yellowing of the plant and death of young plants. Older plants are yellowed and dwarfed. Leaves are thicker than normal and brittle in texture. The virus is also found in annual flowers and weeds.
Management Options

Non-Chemical Management
  • Pull out and destroy infected plants.
  • Control of beet leafhoppers is ineffective for preventing curly top.
  • Since leafhoppers avoid feeding on shaded plants, shading plants (particularly when young) may help prevent infection.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Curly top virus symptoms on bean
Photo by: G.Q. Pelter
Caption: Severe curly top virus symptoms on bean
Photo by: G.Q. Pelter
Caption: Curly top virus symptoms on tomato
Photo by: R.S. Byther