WSU Extension

Hortsense

Carrot
 
Disease
Leaf spot 
Root-knot nematode 
Insect
Carrot rust fly 



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Caption: Root knot nematode damage on carrot
Photo by: R.S. Byther
  
Carrot : Root-knot nematode
(revision date: 6/3/2014)


Biology
Nematodes are microscopic, parasitic worms that live in the soil and in infected plant parts. Carrot roots attacked by root-knot nematodes are stunted, may have many short, bushy side roots, and are generally lumpy or otherwise distorted. The tops of infected carrots may be stunted, yellow, or show other signs of water stress or root damage. Plantings typically show symptoms first in circular patches, which can increase in size each season.
Management Options


Non-Chemical Management
  • Do not replant susceptible crops in infested areas.
  • Rotate with crops such as corn, which is rarely injured by root-knot nematodes.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Root knot nematode damage on carrot
Photo by: R.S. Byther