Do Cicadas Damage Gardens?

Gardeners often wonder if the periodic emergence of cicadas poses a threat to their beloved plants. While these buzzing insects are fascinating to observe, it's crucial to understand their impact on gardens to ensure a healthy and thriving outdoor space. Let's delve into the relationship between cicadas and gardens, exploring the potential damages and myths surrounding these winged creatures.

Cicadas are fascinating insects that undergo a unique life cycle, spending most of their lives underground as nymphs before emerging en masse to mate and lay eggs. This phenomenon, known as a "brood," occurs approximately every 13 or 17 years, depending on the species. With such a long underground phase, it's natural to question the extent of their influence on garden plants when they finally emerge.

Cicada Damage on Plants

One of the primary concerns for gardeners is the potential damage cicadas can inflict on plants. While it's true that adult cicadas feed on sap from plant tissues, the extent of the damage is generally minimal and rarely life-threatening to most garden plants.

Adult cicadas use their piercing mouthparts, called proboscis, to suck sap from plant tissues. This feeding behavior can cause small, discolored spots on leaves, but it typically doesn't result in significant harm to the overall health of the plant. In most cases, the plant can recover from these minor wounds, and the damage is merely cosmetic.

Plant Species Most Affected

Although cicada damage is usually minor, there are a few plant species that may be more susceptible to their feeding habits. Young or newly planted trees and shrubs with smooth bark, such as maples, fruit trees, and young conifers, can be more vulnerable to cicada feeding. The sap-sucking insects may cause small wounds on the bark, which can potentially lead to infections or other issues if the plant is already stressed.

Additionally, some gardeners have reported increased damage to plants during periods of drought or extreme heat. Under these stressful conditions, plants may be less able to recover from cicada feeding, leading to more noticeable damage.

Cicada Killer Wasps: A Double-Edged Sword

While adult cicadas themselves cause minimal damage, their presence can attract cicada killer wasps, which prey on the buzzing insects. These wasps can be beneficial in controlling cicada populations, but they may also cause damage to plants in their search for cicada prey. Cicada killer wasps dig burrows in the ground, often in lawns or garden beds, which can disrupt plant roots and leave small mounds of soil on the surface.

Although these wasps can be a nuisance, their presence is a clear indication that cicadas are abundant in the area. In most cases, the benefits of having cicada killer wasps around – namely, their predation of cicadas – outweigh the minor damage they may cause to plants.

Myths and Facts about Cicadas and Gardens

Many gardeners have heard various myths and misconceptions about cicadas and their impact on gardens. Separating fact from fiction is essential for understanding how to coexist with these fascinating insects and minimize any potential damage to plants.

One common myth is that cicadas cause significant damage to trees, leading to their decline or even death. While it's true that adult cicadas feed on sap from plant tissues, the damage they inflict is typically minimal and not enough to cause serious harm to most garden plants. Even young or newly planted trees can usually recover from cicada feeding, provided they are otherwise healthy and well-cared-for.

The Role of Cicadas in the Ecosystem

Cicadas play a crucial role in the ecosystem, serving as a vital food source for various wildlife species, including birds, bats, and other insects. Their periodic emergence also helps to control their populations, preventing them from becoming pests in the landscape. By understanding and appreciating the role of cicadas in the ecosystem, gardeners can learn to coexist with these fascinating insects and minimize any potential damage to their plants.

Furthermore, the periodic emergence of cicadas can have a positive impact on the environment. The large numbers of cicadas that emerge during a brood event can fertilize plants with their waste, providing a natural source of nutrients. This can help to improve soil health and promote plant growth in the long run.

Managing Cicada Populations in the Garden

While it's generally not necessary to control cicada populations in the garden, there are a few strategies gardeners can employ to minimize any potential damage to plants. One approach is to plant cicada-resistant species in areas where the insects are known to be abundant. Some plant species, such as oaks, elms, and hollies, are less susceptible to cicada feeding and can serve as a buffer between the insects and more vulnerable plants in the garden.

Another strategy is to provide alternative food sources for adult cicadas, such as fruit trees or shrubs that are known to attract the insects. By offering these plants as a food source, gardeners can help to redirect cicada feeding away from more valuable or vulnerable plants in the garden.

In conclusion, while cicadas can cause minor damage to some garden plants, their impact is generally minimal and rarely life-threatening. By understanding the role of these fascinating insects in the ecosystem and employing a few simple strategies to manage their populations, gardeners can learn to coexist with cicadas and create a thriving, sustainable landscape. Embrace the periodic emergence of cicadas as a natural and awe-inspiring phenomenon, and enjoy the opportunity to observe these remarkable creatures up close in your own garden.