Will cicadas damage newly planted trees?

As the 17-year cicadas emerge from the ground after their long underground period, many homeowners and gardeners are wondering if these insects will pose a threat to newly planted trees. The answer is not a simple yes or no, but rather depends on several factors.

The cicada life cycle

Before we can understand how cicadas may affect newly planted trees, it's important to understand their life cycle. Cicadas spend the majority of their lives underground as nymphs, feeding on the sap of plant roots. After 17 years, they emerge from the ground in massive numbers to mate and lay eggs in trees.

The impact on established trees

Established trees are less likely to be significantly impacted by cicadas, as they have deeper and more extensive root systems that are less likely to be damaged by the feeding nymphs. While the cicadas can cause cosmetic damage to trees by laying their eggs in the bark, this is typically not harmful and the trees will recover.

The potential risks to newly planted trees

Newly planted trees, however, may be more vulnerable to damage from cicadas. Their roots are not as established and may be more easily damaged by the feeding nymphs. In addition, if cicadas lay their eggs in the young bark of newly planted trees, it can cause significant damage and stunt their growth.

Protecting newly planted trees from cicadas

If you have recently planted trees and are concerned about the impact of cicadas, there are steps you can take to protect them. One option is to cover them with a fine mesh netting to prevent cicadas from laying their eggs in the bark. Another option is to apply a systemic insecticide to the tree's roots, which can deter cicadas from feeding on them.

The bottom line

While cicadas may pose a risk to newly planted trees, there are ways to minimize the potential damage. By understanding their life cycle and taking preventative measures, homeowners and gardeners can protect their trees and enjoy the unique experience of the 17-year cicada emergence.