WSU Extension

Hortsense

Strawberry
 
Disease
Common leaf spot 
Gray mold 
Red stele 
Viruses 
Insect
Aphids 
Brown marmorated stink bug 
Cutworms and armyworms 
Leafrollers 
Mites 
Root weevils 
Slugs 
Spittlebugs 
Spotted wing Drosophila (SWD) 



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Caption: Strawberry roots showing discolored stele
Photo by: R.S. Byther
  
Strawberry : Red stele
(revision date: 5/6/2014)


Biology
Red stele is caused by a soil-infesting fungus. It is active in cool, wet weather. It attacks roots soon after fall rains begin and remains active through winter, spreading most rapidly where drainage is poor or in heavier soils. The core or stele of diseased roots has a reddish-pink tinge which gradually turns cinnamon-brown and finally black. The root's outer cortex stays white. Lateral roots are quickly destroyed, giving main roots a "rat tail" appearance. Slightly diseased plants show few above-ground symptoms. Severely diseases plants are stunted, foliage may turn bluish-green and eventually plants wilt and die.
Management Options


Non-Chemical Management
  • Use certified strawberry plants.
  • Set new plants in well-drained soil that does not have a history of red stele disease.
  • Plant on beds raised 15 inches to improve drainage.
  • Select resistant cultivars such as 'Olympus', 'Hood', 'Totem', 'Rainier', and 'Shuksan'.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Strawberry roots showing discolored stele
Photo by: R.S. Byther