Disease Attacking Iowa Trees

Iowa Department of Natural Resources officials said Tuesday that one of their state's most identifiable trees is under attack. Officials said bur oak blight is already killing trees in the state and is causing more problems than the emerald ash borer or gypsy moth. The disease was just recently named, but has been killing trees in Iowa since the early 2000s, officials said.

Symptoms of bur oak blight include a v-shaped brown discoloration of leaves and browning veins in July and August. The disease can cause severe loss of leaves that can lead to branches or entire trees dying. Trees die after the fourth or fifth year of defoliation, usually from a secondary pest, DNR officials said.

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