Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Purple Cone Flower (Echinacea) > Spots on leaves

Print Icon Email Icon Share Icon

Purple Cone Flower (Echinacea) > Spots on leaves

1 of 2
  • Image: Powdery Mildew 1
  • Image: Powdery Mildew 2
  • Image: powdery mildew 3

Powdery Mildew
Erysiphe cichoracearum

  • Powdery, fluffy white spots and blothces on leaves, stems, and flower parts
  • Tiny black round spheres may be visible within white spots late in the season
  • Spots typically start on lower leaves but can spread to cover the entire plant
  • Severely infected leaves may be completely covered in white or grayish white fungi
  • In some cases, leaves become curled or twisted or turn yellow due to the infection
  • More information on Powdery Mildew
2 of 2
  • Image: septoria 1
  • Image: septoria 2
  • Image: septoria 3

Septoria Leaf Spot
Septoria sp.

  • Irregular purplish black leaf spots, often with one side flat along a leaf vein
  • Mature leaf spots often have gray center
  • Leaf spots typically start on the lower leaves but can spread to the entire plant
  • Leaves with many appear completely black, dried up and tattered
  • In severe infections all of the leaves of the plant will appear black
  • More information on Septoria Leaf Spot

Don't see what you're looking for?