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Carrot > Root > Hairy root

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  • Image: Aster Yellows 1
    Credit: Whitney Cranshaw, Colorado State University, Bugwood.org
  • Image: Aster Yellows 2

    Credit: Whitney Cranshaw, Colorado State University, Bugwood.org

  • Image: Aster Yellows 3

    Credit: Bill Hutchison, Dept. of Entomology, University of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowAster Yellows
Aster Yellows Phytoplasma

  • Numerous hairy secondary roots develop in lines along the root
  • Older leaves first yellow, then turn a reddish-purple
  • Leaves may become twisted
  • New leaves are small, weak, pale and clustered in a short bunchy top
  • Carrot has a bitter taste and may be off color
  • Infected plants are scattered randomly through the field, and may flower in year one
  • More information on Aster Yellows...
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  • Image: Northern Root Knot Nematode 1
    Credit: A.F. Sherf, Cornell University
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green arrowNorthern Root Knot Nematode
Meloidogyne hapla

  • Many fibrous roots may be present
  • Tap root is stunted, deformed, or forked
  • Many small round to irregular lumps and swellings can be found on both the tap root and fibrous roots
  • In severely infected plants, carrot tops may be stunted, yellow, and wilt during the day
  • More information on Northern Root Knot Nematode...

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