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 ...

Fungi are the most common causal agent of plant disease. Of the more than 2 million species of fungi worldwide, 8,000 are known to be detrimental to plants. These microscopic organisms cause symptoms ...

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 ...

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 ...

Roses do not have thorns; they have prickles. But there ARE “thorns” in the rose garden. Their names are botrytis, black spot, rust, downy mildew, anthracnose and cerospora leaf spot. They are all ...

*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 ...

Gray leaf spot is a widespread fungal disease in corn, responsible for a 23-million-bushel yield loss in the U.S. in 2024. 1 The challenge with controlling gray leaf spot isn’t just deciding whether ...

MOW AND MOW AGAIN: Mow lawns as often as you can between rains. Allowing lawns to get badly overgrown before mowing is detrimental to the health of the grass. Avoid mowing the lawn when the grass ...

Gray leaf spot of corn is caused by the fungus Cercospora zeae-maydis. The fungus is now widespread in Indiana and the Eastern Corn Belt (Midwest). Weather strongly influences development of gray leaf ...