Your description sounds a lot like powdery mildew, which is an easy disease to recognize, and it is common in the landscape at this time of year. It can be a problem that shows up on annuals, ...

DEAR GARDEN COACH: I have roses that all had mildew, all year, even though they were all labeled “disease resistant.” I put systemic fertilizer and did some spray and it didn’t help. It did not keep ...

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 ...

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

It seems to spring up overnight: Powdery mildew. The splotchy white and gray dust covers the leaves and stems of many of the most popular plants. Woody perennials like lilacs, roses, azaleas, ...

Q. Is there any way you could help in figuring out what is wrong with our lilac? – C.B. via email. A. Lilacs are quite susceptible to a fungal disease called powdery mildew, which causes a ...

Question: What is this white coating on the leaves of my chokecherry tree, and what would you recommend to get rid of it? Answer: The likely culprit for those symptoms at this time of year in New ...

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, ...

Powdery mildew, predominantly caused by Podosphaera macularis, continues to be a critical challenge for hop (Humulus lupulus) growers, affecting both yield and quality. The disease exhibits a complex ...

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 ...