Learn how to identify, prevent, and treat powdery mildew with this guide. Discover organic and chemical treatment options, as well as management strategies for long-term control.

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

Dear Jessica: I believe my 25-year-old peonies have powdery mildew. The stems are white and so are a few of the leaves. I don't see any insects. What is the best way to handle this? -- Rita Stasi, via ...

Powdery mildew appears as white or gray spots on roses, usually during warm, humid conditions. Catching infections early is key to stopping them from spreading by removing diseased parts and applying ...

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, ...

Dear Carol: For the past two years, my peonies have gotten white spots on the leaves. This happens after they have finished blooming. Some of the stems are now covered with what appears to be a white ...

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 ...

Two of my favorite long-keeping winter squash, 'Muscade de Provence' and 'Marina di Chioggia' are planted and growing fast. You'd think from their vigor that nothing could get in the way of a fine ...