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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Cosmos > Malformed, cupped or distorted leaves

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Cosmos > Leaves > Malformed, cupped or distorted leaves

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  • Plant growth regulator herbicide injury 1
  • Plant growth regulator herbicide injury 2
  • Plant growth regulator herbicide injury 3

Plant growth regulator herbicide injury
(2, 4-D, Dicamba, etc.)

  • Leaves are twisted or distorted
  • Twisting of stems and petioles
  • Above ground root formation
  • Side of the plant closest to the herbicide application is most severely affected
  • Different species of plants in spray area will show similar symptoms
  • More information on plant growth regulator herbicide injury

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