Skip to Main navigation Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension
www.extension.umn.edu
612-624-1222

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Impatiens > Flowers with blotches, spots or discoloration

Print Icon Email Icon Share Icon

Impatiens > Flowers > Flowers with blotches, spots or discoloration

1 of 2
  • Gray mold 1
  • Gray mold 2
  • Gray mold 3

Gray Mold
Botrytis cinerea

  • Brown spots on leaves with concentric brown rings like a bull’s eye
  • Brown blossoms or petals; flowers drop off prematurely
  • Gray fuzzy mold develops on rotted tissue under humid conditions
  • Disease develops during  cool, wet weather
  • More information on Gray Mold
2 of 2
  • Flower thrip damage 1
  • Flower thrips 2
  • Flower thrip damage 3

Flower Thrips
Frankinella spp.

  • Active from June through September
  • Feeding damage causes petals and leaves to have a stippled or silvery appearance
  • Flowers turn black and prematurely fall off
  • Tiny, black excrement can be seen inside damaged flower buds or on the underside of leaves
  • Adults are 1/16 inch long, elongate, and range from yellow to brown. Nymphs are yellow
  • More information on Flower Thrips

Don't see what you're looking for?

  • © Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy