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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Snapdragon > Leaves wilt and turn brown

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Snapdragon > Leaves > Leaves wilt and turn brown

1 of 3
  • Root rot 1
  • Root rot 2
  • Root rot 3

Root Rot
Pythium spp., Rhizoctonia solani, Thielaviopsis basicola

2 of 3
  • Snapdragon rust 1
  • Snapdragon rust 2
  • Snapdragon rust 3

Snapdragon Rust
Puccinia antirrhini

  • Yellow spots or blotches can be seen on the upper surface of infected leaves
  • Raised brown pustules form on lower leaf surface primarily and grow in concentric rings with age
  • Powdery reddish brown spores rub off on hands and tools
  • Severely infected leaves wilt and die
  • Plants can be stunted and may fail to bloom
  • Disease develops during cool (below 60°F) weather
  • More information on Snapdragon Rust
3 of 3
  • Gray mold 1
  • Gray mold 2
  • Gray mold 3

Gray Mold
Botrytis cinerea

  • Brown spots or blotches on leaves or stems
  • Brown spots or blotches on flowers; flowers drop off prematurely
  • As disease progresses, entire leaves, flowers and shoots turn brown
  • Gray fuzzy mold develops on rotted tissue under humid conditions
  • Disease develops during cool, wet weather
  • More information on Gray Mold

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