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Lettuce

Soilborne Diseases—Harvest

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  • Lettuce drop
  • Lettuce dieback
  • Corky root
  • Verticillium wilt

Names link to more information on identification and management.

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Lettuce drop causes the older leaves to wilt.
Lettuce drop

Identification tip: Older leaves wilt; eventually the entire plant wilts and collapses, making it unharvestable.
Lettuce dieback
Lettuce dieback
Identification tip: Outermost leaves are extensively yellowed. The younger, inner leaves often remain dark green in color, but can be rough and leathery in texture.
Corky root
Corky root damage
Identification tip: Roots show reduced feeder roots and a rough, pitted taproot.

Verticillium wilt
Verticillium wilt
Identification tip: Verticilium causes the area between veins to yellow and turn brown.

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