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Onion > Root > Discolored rotten roots

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  • Image: Fusarium Basal Rot 1
    Credit: Howard F. Schwartz, Colorado State University, Bugwood.org
  • Image: Fusarium Basal Rot 2
    Credit: Howard F.
    Schwartz, Colorado
    State University,
    Bugwood.org
  • - CLICK PHOTOS TO ENLARGE -

green arrowFusarium Basal Rot
Fusarium oxysporum f.sp. cepae

  • Roots are rotted or absent and the bulb is often easily pulled from the ground
  • Onion bulb has watery brown decay starting at the base and extending up into the bulb
  • A white fuzzy growth can often be seen on the rotted basal plate
  • Leaves turn yellow to brown from the tip down and wilt
  • More information on Fusarium Basal Rot ...
2 of 2
  • Image: Pink Root
    Credit: Howard F. Schwartz, Colorado State University, Bugwood.org
  • - CLICK PHOTOS TO ENLARGE -

green arrowPink Root
Phoma terrestris

  • Sunken dark pink to maroon areas on roots
  • Infected roots break off easily
  • Leaves turn yellow with a reddish tinge from the tip down due to root damage
  • Plants are stunted and may produce no to very small bulbs
  • Commonly occurs mid to late season, in areas with poor soil
  • More information on Pink Root...

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