Fungus on Emerald Gaiety Euonymus

peabee's picture

I have a couple of small Emerald Gaiety Euonymus plants. I have noticed that there is some 'pink' spreading on the leaves as well as very small white "dots" on the branches. I am wondering if this is a fungus and if so, what can I use to rid the plant of it? 

Thank you,


the country gardener's picture

I can't be sure about the (post #16696, reply #1 of 6)

I can't be sure about the pink without seeing it, but the white is certainly the start of powdery mildew, which often afflicts Euonymous. Check with your local garden center for effective treatments. This plant does best with polenty of air circulation to keep the mildew at bay, and it's best not to overhead water in the summer months.


"The plants have been good to us."  Lester Hawkins

KimmI's picture

Fungus on Euonymous (post #16696, reply #2 of 6)

Euonymous can get Powdery Mildew, a fungal disease, or more commonly scale. You could spray the plant with a mixture of either 1 teaspoon of Baking Soda per quart of water, or a 50/50 mixture of fat free milk and water, if what thise Euonymous has is PM. More about sprays for fungi is at

I've not heard of Powdery Mildew being pinkish in color but some scales are known to be that color so if what is there is scale then a horticultural oil can help. It might help to take a sample of what you have to your locla office of your state universities Cooperative Extension Service for proper identification.

The sign of a good gardener is brown knees, not a green thumb.

plantn00b's picture

fungus? (post #16696, reply #3 of 6)

hi everyone. this is my emerald gaiety euonymus, was planted june of 08.  this spring a couple of ours started showing this white stuff on the branches and leaves and now is on all 4 of ours, but 2 of them are almost dead. is this the scale you are speaking of and should we be concerned of it spreading to our japanese maple which is very close to these?  i live in michigan and they get sun early morning through early afternoon.  are the ones that are bad too long gone to try the baking soda; should we try something stronger?

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KimmI's picture

What is it? (post #16696, reply #4 of 6)

Powdery Mildew is a greyish white powdery looking dusty substance that appears on the leaves. Scale is wee, usually whiteish rounded thingys that most often appear on stems. Baking soda and the milk/water spray will not do anything to control scale.

If the plants have scale, or even Powdery Mildew, and the plants planted this spring are already dieing there are other problems causing that that need to be addressed. If you are not real sure of what you have clip some samples off, put them into a sealable plastic sorage bag, and visit your county office of the Michigan State University Cooperative Extension Service.

The sign of a good gardener is brown knees, not a green thumb.

plantn00b's picture

i took it to a local lawn (post #16696, reply #5 of 6)

i took it to a local lawn center and it's scale. got fungicide for it. they said they should be fine in a few weeks.

KimmI's picture

Scale (post #16696, reply #6 of 6)

Your local Yard and Garden center said that was scale and sold you a fungicide to control it? I'd not go there any more since they oviously do not know what they are doing. Scales are wee insects and fungicides do not control them, although some will kill anything. Horticultural oils are the first thing to use to control scale, when plants are dormant use a Dormant Oil but if control is needed during the growing season ues a "superior" oil, summer oil.

The sign of a good gardener is brown knees, not a green thumb.