Leaf spot diseases are usually caused by fungi, but a few may be caused by bacteria. These are among the most common plant diseases. Symptoms vary depending on the pathogen and host.

Some common symptoms include:

• frogeye or bull's eye spot marked with concentric rings

• irregular, round tan spots with small black fruiting bodies

• angular tan or black spots

• black or tan spots surrounded by a yellow halo

Use disease resistant cultivars for rose, crabapple, hawthorn, buckeye, and horse chestnut. Rake and remove diseased leaves. Use drip irrigation to minimize leaf wetness.

For chemical control recommendations, consult the Insect and Plant Disease Control Manual, UT Extension Publication 1690, found here. Please contact your local Extension office for specific pesticide recommendations.