Guignardia blotch on horse chestnut leaf (Aesculus) Guignardia blotch is a foliage disease of many Aesculus species, including California, Ohio, red, and yellow buckeye and common, red, and Japanes

Cause: Some trees will show symptoms of this nonparasitic problem year after year, regardless of the weather. Symptoms: Margins of leaves brown and curl during the summer. Trees in pots combined w

Biology Leaf scorch often occurs on a variety of trees (including horse-chestnut) in central and eastern Washington, and sometimes western Washington during the summer. It usually arises after perio