WSU Extension

Hortsense

Cucumber, Pumpkin, Squash
 
Disease
Angular leaf spot 
Cucumber mosaic virus 
Curly top (Beet curly top virus) 
Damping-off 
Pollination failure 
Powdery mildew 
Root rot 
Verticillium wilt 
White mold 
Insect
Brown marmorated stink bug 
Slugs 
Spider mites 
Squash bug 
Western spotted cucumber beetle 



print version| pdf version| email url    
Caption: Damping-off of cucumber seedlings
Photo by: R.S. Byther
  
Cucumber, Pumpkin, Squash : Damping-off
(revision date: 6/3/2014)


Biology
Damping-off of seeds and seedlings is caused by fungi that remain in the soil for long periods of time. Infected seeds decay without germinating. Seedlings may be infected and fail to emerge from the soil. Emerged seedlings are also attacked, causing them to wilt and topple over. Water-soaked to brownish lesions are often visible on the stem at the soil line. Plants become more resistant to attack as they mature. Damping-off fungi are more of a problem in cold soils with poor drainage, and in conjunction with overwatering.
Management Options


Non-Chemical Management
  • Plant in warm, well-drained soils during warm, dry weather.
  • Mulch soils to increase soil temperature.
  • Do not overwater.
  • Do not plant in soils known to be infested with damping-off fungi.
  • Plant shallowly to encourage quick seedling emergence and growth.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

+ Show larger images

 
Caption: Damping-off of cucumber seedlings
Photo by: R.S. Byther
Caption: Damping off of seedlings
Photo by: R.S. Byther
Caption: Damping-off of seedlings
Photo by: R.S. Byther
Caption: Damping off of petunia seedlings
Photo by: R.S. Byther