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Diseases of Birds-Foot Trefoil

 
 
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 Stemphylium Leaf Spot (Target Spot)
Stemphylium loti, S. sarciniforme

What to look for?
These pathogens infect clovers and birds-foot trefoil. Leaf spots are irregular, dark brown and surrounded by a pale halo (target spot). Larger spots show concentric rings.

Leaf spots on trefoil.
Photo: Flores		Picture description
Leaf spots on trefoil.
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Management strategy
The disease is favoured by wet weather and dense stands. Harvest early to reduce leaf loss.

Winter Crown Rot
Coprinus psychromorbidus

What to look for?
This disease is prevalent in years with good snow cover and late springs. The Coprinus sp. formerly known as the low temperature Basidiomycete, is favoured by snow mold promoting conditions and will frequently kill off the crowns of vigorous trefoil plants.

Dead trefoil crowns.
Photo: Howard		Picture description
Dead trefoil crowns.
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Management strategy
No preventative measures.

Photographs and information assembled and prepared for ARD by Dr. Ieaun R. Evans Agri-Trend Agrology Ltd.		  
 
 
 
For more information about the content of this document, contact Ron Howard.
This document is maintained by Shelley Barkley.
This information published to the web on December 16, 2003.
Last Reviewed/Revised on March 18, 2008.