Virus Diseases of Dahlia
 

Dahlia Home
What are Viruses?

Viruses of Dahlias
How do virus diseases look?
Important Dahlia Viruses
Virus Symptoms
How do Dahlia viruses spread?
How to control Dahlia viruses?
How important is vector control?
What help is available for virus identification?

 

 

 

 

VIRUS SYMPTOMS

This site contains symptoms produced by various viruses that infect Dahlia.

The most common symptom is 'mosaic'. It is evident by the presence of a mixture of dark green and light green 'islands' or patches on leaves.

Dahlia Mosaic Virus

Symptoms on young plants include Chlorotic, yellow spots and malformed leaves. Infected plants may look stunted.
   
Chlorosis of leaves can be limited in size on the leaves initially and can spread to the rest of the plant.
   
Some leaves may show severe Chlorosis compared to other leaves on the same plant.
   
Severe infection often leads to yellowing of almost all leaves and stunting of plant.

Impatiens Necrotic Spot Virus

Characteristic Symptom is necrotic ring spots on leaves
 
                         
 
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