The annual arrival of spotted lanternflies presents a recurring moral question for many: Is it acceptable to kill these invasive insects? While public campaigns have encouraged the eradication of these visually striking bugs, scientific understanding of their impact and the feasibility of complete elimination has evolved, prompting a deeper examination of the ethics involved.
Spotted lanternflies, native to China, India, and Southeast Asia, were first detected in the United States in Pennsylvania in 2014. Their introduction raised concerns about potential damage to grapevines, fruit trees, and timber, particularly due to their lack of natural predators in a new environment. Early containment efforts in Pennsylvania, including quarantines and pesticide use, proved insufficient to halt their spread. By 2020, populations were exploding in cities like Philadelphia, leading the Pennsylvania Department of Agriculture to encourage the public to "squish their guts out any time you see them."
This call to action was met with enthusiasm by some, who found satisfaction in participating in a collective effort to combat the invasive species. However, the effectiveness of individual actions, such as stomping, in significantly reducing lanternfly populations has been questioned by scientists. The primary goal of public outreach, they suggest, was not eradication but slowing the spread to allow other regions time to prepare. Official recommendations also include reporting sightings outside quarantine zones and scraping egg masses, which are more efficient methods.
Despite these nuances, the directive to kill lanternflies appears to have been interpreted by some as a general mandate, leading to what has been described as "stomping with abandon—even with a sense of glee." This widespread, often enthusiastic killing has generated ambivalence for some, highlighting a discomfort with the seemingly casual destruction of living creatures. The aesthetic appeal of the lanternflies, described as "gorgeous," further complicates the impulse to kill.
While initial fears of widespread ecological and agricultural devastation have not fully materialized in the U.S., lanternflies remain a concern for grape growers, and the potential for greater destruction in new environments persists. This ongoing threat underscores the continuing argument for measures to prevent their expansion.
To navigate the ethical complexities, an environmental scientist with expertise in moral philosophy, Chelsea Batavia, suggests examining the issue through three normative ethics frameworks: consequentialism, deontology, and virtue ethics.
Consequentialism focuses on the outcomes of an action. From this perspective, killing lanternflies involves weighing the harm to insects, who some believe are conscious and feel pain, against the potential harm to humans, particularly those in the agricultural sector. It also considers the broader implications, such as preventing future suffering for both humans and other lanternflies by controlling the population now. However, Batavia notes that quantifying and comparing these outcomes is fraught with uncertainty, making a purely calculative approach difficult.
Deontology, or the "science of moral duty," emphasizes the intention behind an action. Participating in a community effort to protect local environments or support fellow citizens can be seen as a morally sound motivation, even if the action involves killing. This framework highlights that the intention is not cruelty but a sense of civic duty.
Virtue ethics suggests acting as a virtuous person would. This approach allows for flexibility, as different virtues might guide different actions. A virtuous person might engage in pest control as a community service, or conversely, prioritize the protection of life. The core idea is to act in accordance with recognized virtues and to consider what is fundamentally good.
Batavia also introduces the concept of "moral residue," which describes the lingering negative feeling after making a difficult ethical choice, even if it is believed to be the best option available. This acknowledges that even morally justified actions can be emotionally taxing and that discomfort is not necessarily an indicator of a wrong decision. Batavia emphasizes that inaction is not a neutral option and that individuals must often confront discomfort regardless of their chosen path.
Batavia herself stated that if lanternflies reached Washington, she would acknowledge her "unwillingness to accept that personal burden of taking a life" and would not stomp them, citing a strong reverence for life. The author, however, has decided to stomp them, prioritizing the communitarian value of helping their region and accepting the resulting moral residue. They also plan to vocalize their discomfort during the act, fostering a more honest conversation about the difficult trade-offs involved in managing invasive species.
This exploration highlights that there may not be a single, easy answer to the question of how to ethically manage invasive species, but that engaging with the complexity and acknowledging the moral residue is a responsible approach to decision-making.