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 READ MORE http://www.mobot.org/gardeninghelp/PlantFinder/IPM.asp...
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 READ MORE http://plant-disease.ippc.orst.edu/ShowDisease.aspx...