Tree with symptoms of horsechestnut leaf blotch.
Horsechestnut leaf blotch. Photos of horsechestnut leaf blotch were found at the following website: http://www.ppdl.purdue.edu/PPDL/weeklypics/9-11-06.html.
This image of Phyllosticta leaf spot was taken from: http://ohioline.osu.edu/hyg-fact/3000/3044.html
This image of red thread was found at the following website: http://www.plantpath.wisc.edu/tddl/tddl/disimg/red/plant.jpg