Cicadas: Do They Destroy Plants?

Cicadas, those buzzing, winged creatures that emerge from the ground after years of dormancy, are a fascinating part of nature's cycle. But as gardeners and plant enthusiasts, a common question arises: do cicadas destroy plants? The short answer is no, cicadas do not typically destroy plants. However, their presence and behavior can sometimes lead to misconceptions about their impact on vegetation.

Cicadas spend most of their lives underground, feeding on plant roots. This is where the confusion often begins. The idea that they might be destroying plants is not entirely unfounded, as they do consume plant material. However, the damage they cause is usually minimal and not significant enough to destroy plants.

Cicadas' Feeding Habits and Plant Interaction

The life cycle of a cicada is complex and lengthy, typically lasting between 2 to 17 years, depending on the species. During this time, they feed on the sap of plant roots. This behavior is similar to that of other sap-feeding insects, such as aphids or scale insects. While it might seem like they're causing harm, the damage is usually negligible and doesn't significantly impact the plant's health.

Cicadas prefer to feed on the roots of young, tender plants. They are less likely to feed on mature plants, as their roots are tougher and less palatable. Moreover, the damage they cause is often localized to the area where they've burrowed, and the plant can usually recover given time and proper care.

Exceptions to the Rule

While cicadas generally do not destroy plants, there are a few exceptions where they might cause more significant damage. For instance, in large numbers, cicadas can strip a plant of its leaves, leaving it vulnerable to other stressors like disease or extreme weather conditions. However, this is rare and usually only occurs in areas with high cicada densities.

Certain species of cicadas, like the Magicicada genus, are known as "periodical cicadas" because they emerge in massive, synchronized swarms every 13 or 17 years. While they don't typically destroy plants, their emergence can cause temporary defoliation, which can stress trees and make them more susceptible to pests and diseases.

Cicadas and Tree Health

Cicadas can sometimes be beneficial to tree health. Their burrowing activity can help aerate the soil, improving water and nutrient absorption. Additionally, their droppings, known as frass, can act as a natural fertilizer, enriching the soil with essential nutrients.

Furthermore, cicadas play a crucial role in the ecosystem. They serve as a food source for various animals, including birds, bats, and other insects. Their emergence also signals the start of summer for many species, triggering breeding behaviors and other biological events.

Managing Cicadas in Your Garden

Given their generally benign nature, managing cicadas in your garden is usually not necessary. However, if you notice a sudden increase in cicada activity or see signs of excessive damage, there are a few steps you can take.

Firstly, ensure your plants are healthy and well-cared for. Healthy plants are better equipped to withstand any stress caused by cicada feeding. Secondly, consider physical barriers like netting to protect young or vulnerable plants. Lastly, if the cicada population in your area is unusually high, you might want to consult with a local entomologist or gardening expert for advice tailored to your specific situation.

In the grand scheme of things, cicadas are more of a curiosity than a threat to your plants. Their emergence is a fascinating spectacle of nature, and with proper care and understanding, your plants can coexist peacefully with these buzzing neighbors. So, the next time you hear the distinctive hum of cicadas, remember that they're not out to destroy your plants, but are instead playing their part in the intricate dance of life in your garden.