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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Onion > Discolored rotten roots

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Onion > Root > Discolored rotten roots

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  • Image: Fusarium Basal Rot 1
  • Image: Fusarium Basal Rot 2

Fusarium 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 ...
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  • Image: Pink Root

Pink 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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