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 ...

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 ...

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 ...

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 ...

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 ...

Plant pathologist Nathan Wyatt’s research focuses on studying the potential for cercospora leaf spot to develop to management practices including planting sugarbeets with the CR+ trait. Tiny leaf spot ...

Q. The magnolia in our backyard doesn’t seem to be thriving. The branches and leaves aren’t as thick and lush as they were a year or so ago. And when I looked closely I realized there are spots on ...

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 ...

Take a look outside, and you might see that your crape myrtle’s leaves are turning shades of yellow, orange and red and falling to the ground. Is this a sign that autumn is near? Not quite. This time ...