Powdery mildew is a common fungal disease that affects a wide range of plants, identifiable by white to gray powdery spots on plant surfaces. Prevention focuses on reducing humidity around plants, ...

Q: Last year powdery mildew spread across most of my garden including my pumpkin and squash patch. Do the spores overwinter in soil? Will turning soil help? Anything that should avoided at all costs? ...

Lots of plants, both edible and ornamental, can get powdery mildew. Unlike many other fungal plant diseases, the fungi that cause powdery mildew thrive in hot, dry weather that's often the norm in mid ...

If a white, dusty coating suddenly appears on your houseplant’s leaves, don’t panic—but don’t ignore it. “Powdery mildew is a type of fungal infection that affects plants,” says Bex Claire Hamell, ...

The gardening season has started and if you’ve got questions, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU Extension faculty and ...

Powdery mildew is one of those problems that is immediately obvious, once you know what to look for. Here's the bad news: Most local gardeners know it so well because everyone deals with it this time ...

Powdery mildew is a fungal disease affecting many plants, causing a white or gray coating on leaves and slowing growth. The fungus thrives in warm, dry weather with high humidity, especially in ...

“My red rhododendron looks as if it has a layer of ash or white powder on it (above). What should I do?” asks Birds & Blooms reader Steven Graves of Aptos, California. Horticultural expert Melinda ...

Q: My peonies have powdery mildew and I'm wondering what I can do to get rid of it. What causes this? I'm planning to divide them this fall but I don't want to spread it into a different flower bed. - ...

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 ...

Stopping powdery mildew early saves houseplants by protecting photosynthesis, preventing spread, and avoiding long-term leaf damage. Remove infected leaves quickly, isolate plants, and treat with ...