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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Petunia > Stunted plant

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Petunia > Plant > Stunted plant

1 of 4
  • Aster yellows 1
  • Aster yellows 2
  • Aster yellows 3

Aster Yellows
Phytoplasma

  • Leaves are small and yellow on a few to all stems
  • Flowers are small pale green to white and underdeveloped
  • Clumps of weak shoots known as witches broom develop throughout the plant
  • Infected plants are often stunted
  • Often one to a few random plants within a flower bed are infected while others remain healthy
  • More information on Aster Yellows
2 of 4
  • Black root rot 1
  • Black root rot 2
  • Black root rot 3

Black Root Rot
Thielaviopsis basicola

  • Leaves turn yellow and wilt; leaf veins may remain green
  • Plants are stunted
  • Dark sunken black lesions occur on roots
  • Stems below ground may develop black longitudinal cracks
  • More information on Black Root Rot
3 of 4
  • Tobacco mosaic virus 1
  • Tobacco mosaic virus 2
  • Tobacco mosaic virus 3

Tobacco Mosaic Virus (TMV)

  • Symptoms may vary depending on cultivar, age of plant and other factors
  • Leaves have a mosaic pattern of light and dark green
  • Leaves may be distorted, curled or twisted upward
  • Lab test needed to identify which virus is causing the problem
  • More information on TMV
4 of 4
  • Impatiens necrotic spot virus 1
  • Impatiens necrotic spot virus 2
  • Tomato spotted wilt virus

Impatiens Necrotic Spot Virus (INSV) or Tomato Spotted Wilt Virus (TSWV)

  • Symptoms may vary depending on cultivar, age of plant and other factors
  • Brown to black ring spots or flecks on leaves
  • Plants may be stunted and have distorted leaves
  • Severely infected young plants may turn brown and die
  • Lab test needed to identify which virus is causing the problem
  • More information on INSV and TSWV

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