A picture of leaves with leaf spot disease. - Boyloso/Shutterstock Have you noticed discolored spots or lesions on the leaves of your plants? This could be leaf spot disease, and it's wreaking havoc ...

Agronomist Ryan Gentle shares scouting tips and spray timing strategies to control tar spot, southern rust and other corn ...

There are two common types of leaf diseases on English ivy found in Illinois. One is caused by fungi and the other is caused by a bacterium. Both diseases can cause defoliation if severe, but your ivy ...

Q. My maple tree has black spots on the leaves that just appeared recently. Should I be concerned about this? What should I do? A. Sometimes wet conditions earlier in the season can cause problems ...

Every maple tree in my yard has spots, all the way to the top. Are they doomed? Can I do anything? And my buckeye tree leaves are already turning brown, like it was autumn. What to do? -- Dorene Davis ...

Question: I planted a shiny leaf ligustrum last year that has developed small, circular yellow spots with a brown center on some of the leaves. People have told me this is a fungus. What should I do?

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Leaf spot - Hydrangea quercifolia Q • What are the black spots appearing on my hydrangea leaves? The black spots on your ...

If your lilacs are looking rough right now, it is probably lilac leaf spot, a relatively new fungal disease in Minnesota. Symptoms typically appear from July to September. Leaves turn yellow, then ...

My witch hazel started getting brown spots all over the leaves. What is this and what should I do? A: That looks and sounds like a fungal disease, cleverly called "leaf spot" because that's the most ...

Dear Neil: I have an oak tree that is several feet in diameter. It’s about 15 feet from my foundation, and now a 3-inch root has come to the surface right at the corner of our foundation. Should I ...

Q: I get some kind of leaf disease on my hydrangea bushes every year. I have about 15 of them in various garden locations. They start out fine but end up covered with these spots by mid-season. I ...