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 > Ageratum > Entire plant or branch wilts

Print Icon Email Icon Share Icon

Ageratum > Plant > Entire plant or branch wilts

1 of 2
  • White mold 1
  • White mold 2
  • White mold 3

White Mold
Sclerotinia sclerotiorum

  • Entire plant or single branch wilts, leaves turn brown and die
  • Wilted stems are discolored, tan to off-white
  • Fluffy, white cotton-like fungal growth may been seen on infected plants when humidity is high
  • Round to irregular hard black fungal structures ranging in size from 1/16 to ½ inch can be found clinging to the outside an infected stem or embedded inside the dead stem
  • More information on white mold
2 of 2
  • Image: 1
  • Image: 2
  • Image: 3

Root rot
Rhizoctonia solani and Pythium spp.

  • Leaves turn yellow and wilt
  • Plants are stunted
  • The base of the stem may turn brown and crack
  • Roots have brown sunken areas and lack root hairs
  • The outer root tissue may be easily removed leaving behind thin, stringy root cores
  • Disease favors cool, wet soil with poor drainage
  • Lab test necessary to distinguish between Rhizoctonia and Pythium Root Rot
  • More information about Rhizoctonia root rot
  • More information about Pythium root rot

Don't see what you're looking for?