Scale On 40 Year Old Eunonymus.

Question

I just noticed my eunonymus had lost a lot of leaves. I thought it was the dry conditions, but noticed what looks like white powder on leaves and bark. I believe this is scale. I have sprayed with a water/soap mix for now but what would you recommend for more effective treatment, that isn’t harmful to other insects if possible Many thanks.

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Answer 1

It does look like euonymus scale. Neem oil or horticultural oil is usually effective. If you catch them at the crawler stage, insecticidal soap should help. Here is more:

https://www.gardeningknowhow.com/ornamental/shrubs/euonymus/euonymus-scale-treatment.htm