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 ...

Fall may be in the air, but gardening season is still happening, and you may have questions. For answers, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s ...

Understanding Septoria Leaf Spot. Do you have brown or black spots on your tomato leaves? It could be septoria leaf spot.

As the first few leaves begin to turn from green to gold, you may notice a number of aspen trees have black spots on their leaves. Though there can be several reasons for these spots, it is most ...

It’s a sign of the times: spots and dots appearing before our very eyes, seemingly overnight. No, it’s not your vision failing you, and there’s no need to clean your glasses. We’re dealing with ...

These are the most common causes of brown spots on fiddle leaf fig foliage, plus simple tips for restoring your plant’s health. Crystal Bolin Photography / Getty Images Fiddle leaf figs are among the ...

Frogeye leaf spot (FLS), caused by Cercospora sojina, is a serious disease affecting soybeans and can cause more than 30% yield loss if not properly managed. First reported in the United States in ...

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 ...

Cherry leaf spot is a destructive disease that causes premature defoliation, fruit yield loss, and long-term tree weakening in cherry orchards.

Question: I planted several mountain laurels last year, and I noticed that over the winter they have developed black spots with a white center on all of the leaves. They are located on the edge of my ...

Brown spots on hydrangea leaves and flowers are rarely fatal to hydrangea plants. However, these unsightly blemishes can impact the look of your hydrangeas and they may signal that your plants are ...