Introduction Leaf blotch of horse chestnut is caused by the fungus Guignardia aesculi. This is a common disease which causes browning of the leaves especially during years with wet springs. It is u

Karen Rane, Sr. Plant Disease Diagnostician, Dept. of Botany & Plant Pathology, Purdue Univ. The blighted areas on these horsechestnut leaves are symptoms of the common fungal disease called Guign

Daniel H. Gillman, Plant Pathologist UMass Extension Landscape, Nursery & Urban Forestry Program Fall 2005 The fungus, Guignardia aesculi (sexual stage), initiates leaf infections in early s

Horse chestnut leaf blotch is an unsightly, but not seriously damaging, disease of white- and red-flowered horse chestnuts. It causes irregular brown blotches on leaves. What is horse chestnut leaf

Nancy Pataky Horsechestnuts are not used widely in the landscape, but we do see this disease fairly frequently. It may be known as horsechestnut leaf blotch or Guignardia leaf blotch, named for the

ntroduction Leaf blotch of horse chestnut is caused by the fungus Guignardia aesculi. This is a common disease which causes browning of the leaves especially during years with wet springs. It is us

This factsheet includes information on the fugus Guignardia aesculi and its environmental conditions, symptoms, survival and dispersal and lastly control. Leaf blotch of horse chestnut is caused by t