Cucumber Mosaic Virus

Melon aphids are known to transmit CMVMelon aphids are known to transmit CMV.
Mosaic Pattern on Infected CucumbersMosaic pattern on infected cucumbers.
CMV Foliar SymptomsCMV foliar symptoms.
Pepper Foliage with CMV SymptomsPepper foliage with CMV symptoms.

HOSTS

  • Cucurbits
  • Leafy Greens
  • Legumes
  • Onions
  • Solanaceae
  • Ornamental plants

DESCRIPTION

Cucumber mosaic virus (CMV) is a cucumovirus, first reported on cucumbers. However, the pathogen can infect other vegetable crops including peppers, spinach, beans, and celery.

BIOLOGY

CMV is primarily spread by aphids feeding on infected plants, but can also be spread through infected seeds or transplants, and mechanically on tools or equipment.  

CMV can overwinter in crops and weeds. Aphids that feed on infected plants will transmit the pathogen when they feed on other susceptible plants. Aphids carry the disease non-persistently, meaning CMV can only be spread on the stylet for 2-3 hours.  

SYMPTOMS

Symptoms of CMV will vary depending on host species and environmental factors. Common symptoms include: 

  • Stunted growth.
  • Yellow mosaic pattern on foliage and fruit.
  • Distorted growth of leaves and fruit.

GENERAL MANAGEMENT

Once a plant is infected with CMV there is no effective treatment; prevention is key.
  • Use certified disease-free seeds and transplants. 
  • Choose vegetable varieties that are resistant to CMV.  
  • Sanitize tools and equipment after use on susceptible plants. 
  • Remove infected plants and plant debris. 
  • Remove weeds and volunteer plants that can serve as hosts for CMV and aphids. 
  • Deter aphid populations by using silver, reflective mulches.  

 

 

 

 







Precautionary Statement: Utah State University and its employees are not responsible for the use, misuse, or damage caused by application or misapplication of products or information mentioned in this document. All pesticides are labeled with ingredients, instructions, and risks, and not all are registered for edible crops. “Restricted use” pesticides may only be applied by a licensed applicator. The pesticide applicator is legally responsible for proper use. USU makes no endorsement of the products listed in this publication.