Mexican scientists have developed a national sterile-fly strain to combat the cattle-killing barrenador worm in the state of Chiapas [1, 2].
This initiative is critical for the protection of livestock and regional agriculture. The barrenador worm causes severe damage to cattle herds and had previously been absent from the region for 30 years [3, 4].
Researchers at a bio-security laboratory in Chiapas led the development of the strain [1, 2]. The sterile-fly strain has been reared in the laboratory for seven generations [5]. These flies are designed to disrupt the breeding cycle of the barrenador worm, effectively suppressing or eradicating the parasite's population in the wild.
To support the deployment of this biological control, Mexico established the MOSCAMED sterile-fly production plant [2, 6]. The facility is located in Metapa de Domínguez, Chiapas, a strategic site near the border with Guatemala [6, 7].
Funding for the MOSCAMED plant totaled $21 million [6]. The plant was inaugurated in June 2024 to fortify the national effort against the pest [7, 8]. By producing sterile flies locally, the government aims to create a sustainable barrier against the worm's spread.
The barrenador worm resurfaced in Chiapas after three decades of absence [3, 4]. The return of the parasite posed an immediate threat to the cattle industry, prompting the mobilization of national research, and financial resources to secure the border region [4, 7].
“The barrenador worm had previously been absent from the region for 30 years.”
The development of a localized sterile-fly strain reduces Mexico's reliance on international biological imports and allows for a more rapid response to pest outbreaks. By placing the production plant in Metapa de Domínguez, the government is treating the Chiapas-Guatemala border as a primary biological firewall to prevent the barrenador worm from devastating the wider national cattle economy.
