How to Identify and Manage Powdery Mildew on Chrysanthemums
Chrysanthemums have earned their reputation as tough, maintenance-free flowers for the home garden and they’re extremely popular for this reason.
If you want bright color without a lot of work or worry about diseases, mums are the way to go.
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But every now and then, even the toughest plant can fall prey to pests or disease.
In chrysanthemums, powdery mildew is one of the most common issues you’ll come across. While it has the potential to kill your plants, it usually just makes them look kind of ugly.
If you’ve noticed a strange powdery substance on your plants, you’re probably dealing with powdery mildew.
We’ll help you figure out whether it’s mildew or not, and if it is, how to eliminate it. Here’s everything we’ll go over in this guide:
This is a common disease but it’s not a challenging one to deal with, and a ton of different products can be very effective against it.
We can even use natural methods to prevent and stop it!
What Causes Powdery Mildew in Mums?
Golovinomyces cichoracearum (formerly Erysiphe cichoracearum) and G. chrysanthemi are airborne fungi that cause the disease known as powdery mildew in chrysanthemums.
These pathogens thrive in cool weather with high humidity, though 100 percent humidity will kill spores.
It can survive and reproduce in temperatures ranging from 40 to 90°F, but things really start cooking when temps are between 68 and 77°F.
Symptoms
The most obvious symptom is powdery gray growth on the leaves and stems of mums.
In the beginning, you’ll just see small spots of a powdery substance, usually around the base of buds and leaves.
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