Euonymus Scale: A Guide for Young Gardeners
Introduction
Euonymus is a popular choice for gardens because it’s a beautiful and versatile plant. But it can also be a target for a devastating pest: the euonymus scale. This article will help you learn how to identify, control, and prevent euonymus scale infestations.
What is Euonymus Scale?
Euonymus scale is a tiny insect that feeds on the sap of euonymus plants. It goes through several stages of life, but it’s most visible in its late stage, when it settles on a single spot on the plant and grows a hard protective shell (a scale) over its back.
How to Identify Euonymus Scale
The first sign of an euonymus scale infestation is usually white to yellow blotches on the tops of the plant’s leaves. As the infestation gets worse, the plant may appear water-stressed, with leaves yellowing, drooping, and even falling off.
To confirm that you have euonymus scale, look for the scale insects themselves. They may appear as clusters of rice on plant leaves. If you notice scales on your plant, scrape at a few with your fingernail. If you see an orange smear, the scales are still alive and need to be dealt with.
How to Control Euonymus Scale
The best time to control euonymus scale is when they’re in their crawler stage, before they grow their protective shells. This usually happens in spring to early summer. You can spray with an insecticide or horticultural oil during this time.
If you miss the crawler stage, another should occur six weeks later. You can also introduce lady beetles, which are natural predators of euonymus scale. Pruning heavily infested branches can also help to control the infestation.
Certain horticultural oils can also be used when the scales are in their shells. These oils form a layer that literally suffocates the scales. Read the label of your oil to see if it will be effective on mature scales.
How to Prevent Euonymus Scale Infestations
The best way to prevent euonymus scale infestations is to keep your plants healthy and vigorous. Water them regularly and fertilize them according to the manufacturer’s instructions. Avoid overwatering, as this can weaken the plants and make them more susceptible to pests.
You should also inspect your plants regularly for signs of pests and diseases. If you find any pests, treat them immediately to prevent them from spreading.
Conclusion
Euonymus scale can be a devastating pest, but it can be controlled with the right treatment. By following the tips in this article, you can help to keep your euonymus plants healthy and beautiful.
Additional Information
- How to Identify Euonymus Scale: https://extension.umn.edu/plant-diseases/euonymus-scale
- How to Control Euonymus Scale: https://www.gardeners.com/how-to/euonymus-scale/7153.html
- How to Prevent Euonymus Scale Infestations: https://www.bhg.com/gardening/pests/insects/euonymus-scale/
