“The leaves of my peonies are covered with what appears to be a white mold, with some of the leaves even turning brown already. What is this problem, and will it affect the plants next year? Should I ...

Prevention is key to managing this widespread plant disease. Powdery mildew is a common fungal disease that affects a wide range of plants, identifiable by white to gray powdery spots on plant ...

Powdery mildew, one of the most easily identifiable fungi, first appears as white spots on plants and then spreads. In some plants, the leaves eventually turn yellow or brown and fall off, leaves or ...

There's an organic solution that gets rid of powdery mildew fast and fights pests at the same time. It's my go-to spray for ...

The grayish white powdery growth you are seeing on the dahlia leaves is caused by a fungus and can also be a common garden problem on other plants. Many species of fungi can cause powdery mildew on ...

Powdery mildew on Tatarian maple leaves. Photo courtesy Getty Images. Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in Menlo Park ...

URBANA, Ill. — The summer is always a little brighter in the garden when brightly colored zinnias are among the various plants. Zinnias are heat and drought-tolerant plants that attract a variety of ...

An expert rosarian offers advice on how to block or minimize powdery mildew, black spot, rust and more in San Diego gardens.

Q: Last year my grapes had such bad powdery mildew that even the grapes dried up and looked moldy and shriveled. I was told by the master gardeners at the farmer’s market that I needed to do something ...

Powdery mildew shows up like an uninvited guest, coating leaves in a dusty white film and quietly sabotaging healthy plants.

Dr. Elizabeth Yuko is a bioethicist and adjunct professor of ethics at Fordham University. She has written for The New York Times, The Washington Post, The Atlantic, Rolling Stone, CNN & Playboy. May ...