A new peer-reviewed study warns that escaped insects risk outcompeting native wildlife, transmitting diseases, damaging local agriculture, and permanently altering food webs. One million cockroaches were recently accidentally released from a Chinese insect farm. There is genetic evidence of escaped farm flies hybridizing with wild populations in Europe. The industry is scaling rapidly, with biosecurity frameworks that researchers describe as dangerously insufficient.
A study published recently in the Journal of Applied Ecology warns that farmed insects could be ecological time bombs, poised to outcompete native wildlife, transmit diseases, damage local agriculture, and permanently alter food webs. The study authors argue that this risk should be considered a ‘global policy priority.’ Insect farming could be on track to repeat one of aquaculture’s most costly mistakes. Of the crustacean species farmed commercially, 22 are now invasive, 19 of them traced directly to farming operations. The estimated damage since 1960 exceeds $19 billion.
Call for immediate action
The authors from Paris-Saclay University, France’s Natural History Museum, and the Swedish University of Agricultural Sciences call for immediate action to prevent similar, irreversible damage from insect farming. Specifically, they recommend strict facility protocols, ongoing intensive monitoring of surrounding environments to detect escapes, and strong, enforceable policy frameworks to control biological invasions. Since the most-farmed species (black soldier fly, yellow mealworm, house cricket) are already being cultivated well outside their native ranges globally, the window to act is now.
Research by the Insect Institute published in Biological Reviews concludes: when introduced to non-native regions, invasive insects can cause severe ecological disruptions. This includes displacing native species, driving local extinctions and altering population dynamics through mechanisms like predation, competition, disease transmission and hybridization. The new study, ‘Preventing the next invasion: Lessons from aquaculture for the safe expansion of insect farming,’ delivers a stark warning to policymakers and the public. According to the research, the insect farming industry is currently operating with dangerously ‘insufficient management frameworks.’
Insect escapes are already happening
While insect farming is often portrayed as a clean, low-risk alternative to conventional livestock, the study documents that escapes from insect farms have already occurred. In one striking example, approximately one million cockroaches were accidentally released from a medicinal insect farm in China. A previous study demonstrated evidence of genetic hybridization ‘between lineages occurring in a small number of individuals in Europe, likely as a product of escaped flies from farms.’
The authors note that the absence of documented ecological impacts from insect farming so far likely reflects a lack of ecological monitoring and research in this sector, not the absence of risk. As the industry scales, the probability of escapes and their consequences grows substantially.
Lessons from aquaculture: a blueprint for what not to do
The study draws a compelling parallel between insect farming and aquaculture (particularly crustacean farming) as a taxonomically close analogue with a well-documented invasion history. The comparison is sobering. Of the 63 crustacean species used in aquaculture, 22 are currently classified as invasive, and 19 of those were introduced as a direct result of farming. These invasive species have caused an estimated minimum of USD $19.2 billion in damages between 1960 and 2020. Four invasive farmed crustacean species alone are associated with an estimated US$734 million in damages between 2000 and 2018.
Real-world impacts include the silver carp negatively affecting native sport fish populations, tilapia contributing to the collapse of local aquaculture systems, and crayfish species damaging water infrastructure and causing significant crop losses in soybean and rice farming. These are not hypothetical scenarios; they are documented, costly outcomes of insufficient governance during a period of rapid aquaculture expansion.
The insect farming sector shares several structural risk factors with aquaculture: species are selected for traits like rapid growth, high fecundity, and broad environmental tolerance — traits that also predict invasive potential. Many commercially farmed insect species, including the black soldier fly, the yellow mealworm, and the house cricket, are now cultivated globally, often well outside their native ranges.
The costs of inaction are well-established and steep
Invasive insects already impose enormous costs even absent farming-related escapes: insects as a class have caused an estimated over US$441 billion in economic damage between 1960 and 2020. The lesser mealworm — one of the most widely farmed insect species — is already a serious pest in poultry farming, damaging infrastructure and contaminating food supplies.
The study makes clear that once an invasive species establishes itself, control is costly and often impossible. Invasive arthropods are difficult to detect due to their small size and mobility, and chemical or biological control measures frequently carry their own ecological risks. A time lag between initial introduction and detection means that by the time a problem is identified, significant damage may already be done.
A critical juncture: why policymakers must act now
The authors frame this moment as a “critical juncture” for the insect farming sector — one in which proactive governance can still prevent the outcomes seen in aquaculture. They argue that the tools to do this already exist and are directly transferable. The study specifically calls attention to the Global South, where insect consumption is most widespread and food security challenges are greatest — but where comprehensive regulatory frameworks are often absent. Strengthening governance of non-native insect farming in these regions should be considered a global policy priority.
As the authors conclude, ‘preventing invasions before they occur is not only feasible but necessary to maintain the environmental integrity and social licence of this emerging industry…. Insect farming now stands at a critical juncture. Its potential to contribute meaningfully to the Sustainable Development Goals must not be realized at the expense of biodiversity and ecosystem health. With the benefit of historical insight and proven risk mitigation strategies, the sector can chart a different path.’
Manfrini, E., Courchamp, F., Leroy, B., & Berggren, Å. (2026). Preventing the next invasion: Lessons from aquaculture for the safe expansion of insect farming. Journal of Applied Ecology. https://doi.org/10.1111/1365-2664.70311