Skip to Main navigation Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension
www.extension.umn.edu
612-624-1222

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Onion > White fuzzy growth on bulb

Print Icon Email Icon Share Icon

Onion > Bulb > White fuzzy growth on bulb

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

Fusarium basal rot
Fusarium oxysporum f.sp. cepae

  • A white fuzzy growth can often be seen on the rotted basal plate
  • Leaves turn yellow to brown from the tip down and wilt
  • Onion bulb has watery brown decay starting at the base and extending up into the bulb
  • Roots are rotted or absent and the bulb is often easily pulled from the ground
  • More information on Fusarium Basal Rot ...
2 of 2
  • Image: Fusarium Basal Rot 2

White rot
Sclerotium cepivorum

  • Bulb has white, fluffy fungal growth
  • In severely infected plants, leaves may be stunted, yellow from the tip down, and die
  • Small, hard, black poppy seed like fungal structures form on infected bulbs
  • More information on White Rot ...

Don't see what you're looking for?

  • © Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy