Frog-eye leaf spot on red maple. Photo by: Joseph O'Brien, USDA Forest Service, Bugwood.org
Bacteria blight on lilac. Twigs turn black and wilt from the tips back to the stem. (provided by Karen L. Snover-Clift, Cornell University) Photo found at: http://plantclinic.cornell.edu/FactSheets/LilacBactBlight/lilacbactblight.htm
Bacteria blight on lilac. Leaves often show damage around the margins and/or along the central vein. (provided by Karen L. Snover-Clift, Cornell University). Photo found at: http://plantclinic.cornell.edu/FactSheets/LilacBactBlight/lilacbactblight.htm
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