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 ...

Our Indian hawthorn bushes seem to have a disease. They were thriving a few weeks ago, and now they are practically bare. The leaves have spots and are turning red and dropping off. What would you ...

A reader recently asked what the brown spots are on their rhubarb. Leaf spots are commonly found on rhubarb plants. This is more of an aesthetic problem and won't severely damage the plant. Rhubarb is ...

Chuck H. from Larkfield asks: The Photinia shrubs I have planted alongside my back fence have developed these brown spots on the leaves. Some leaves have been falling, and it looks like its spreading ...

Are you dealing with Septoria brown spot in your soybean fields? You already know this and other common foliar fungal diseases wreak havoc on soybean crops, but you might not know how to start ...

This is about the time of year Cercospora leaf spot is obvious on hydrangea leaves. This fungal disease is brought about by humid weather but is also more likely to affect plants that are watered ...

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 ...

Q: This happened to my Mexican plum last summer. What caused it, and what can I do to prevent it this year? A: At first glance I thought this had been caused by caterpillars, but then I decided to ...

A third disease, late blight, is a less common but much more serious infection that occurs during cool, moist years. We won’t have to worry about that this year because of the hot, dry summer we’ve ...