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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Onion > Holes or cracks in bulb

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Onion> Bulb > Holes or cracks in bulb

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  • Image: Onion Maggot 1
  • Image: Onion Maggot 2
  • Image: Onion Maggot 3

Onion maggot
Delia antiqua

  • Holes in onion bulbs are present
  • Onions yellow and wilt, sometimes rapidly
  • Maggots may be present; they are carrot-shaped, legless, and cream colored
  • More information on Onion Maggot ...
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  • Image: Wireworms 1
  • Image: Wireworms 2

Wireworms
Agriotus spp., Melanotus spp.

  • Tunneling and holes in roots
  • Leaves show no damage
  • Larvae are thin, shiny, jointed, yellow to reddish-brown color, and approximately ¼ - 1 ½ inch long
  • More common in gardens that were previously in grass or sod
  • Larvae can be found throughout the growing season
  • More information on Wireworms ...
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  • Image: Stem and Bulb Nematode 1
  • Image: Stem and Bulb Nematode 2

Stem and bulb nematode
Ditylenchus dipsaci

  • Outer layer of bulb is split or has cracks
  • In severe infestations, plant may wilt and die
  • Leaves are twisted and stunted
  • Bulbs are often desiccated and light weight, secondary rot organisms like soft rot may invade and rot the bulb
  • More information on Stem and Bulb Nematode ...

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