Because of the rain, some of the plants in my garden are suffering from a serious case of powdery mildew. Powdery mildew is caused by Sphaerotheca fuliginea. The leaves on my phlox, roses, cucumbers and even the Manitoba maple tree are covered with grayish-white, powdery spots. Although powdery mildew isn’t pretty, it is rarely fatal, so I’m not that concerned. To combat this pesky fungicide, I prune the infected plant parts and get rid of them. This helps improve the air circulation around the plant. Since powdery mildew likes a moist, humid environment, this helps combat the infection. You could apply fungicide, but there is also a home remedy using baking soda, which helps reduces the plants risk of becoming infected in the first place.
Homemade Powdery Mildew Fungicide
- 3 ½ litters of water
- 1 tablespoon baking soda
- ½ teaspoons liquid soap
I’ve also heard spraying a concoction of milk (1 part milk to 9 parts water) that helps reduce a powdery mildew infection, but I’ve never tried this remedy myself.
Originally published on the http://www.canadiangardening.com/blogs/