Can chocolate be saved?
Cocoa is the essential ingredient in chocolate, so threats to the crop reverberate from Latin American fields straight to dessert lovers everywhere. A new study in Frontiers in Plant Science reports promising results against Moniliophthora roreri, the fungus that causes moniliosis in cocoa trees. This disease is among the most damaging for cocoa in Latin America and can destroy 70–80% of the bean harvest. The researchers developed a natural emulsion combining fengycin, a lipopeptide produced by Bacillus bacteria, with essential oils, and tested it against the pathogen.
In laboratory tests, the emulsion prevented fungal mycelium from growing and stopped spores from germinating. Fengycin disrupts the fungus's cell membranes, while essential oils high in terpenes and phenols intensify that destructive effect. The stable mixture also spreads uniformly, reduces how quickly the oils evaporate, and extends the protective window.
A healthier alternative to chemical fungicides
Standard chemical fungicides remain common in fungal disease control, but they have limited effectiveness and can harm both the environment and human health. By contrast, a biological approach like this emulsion may make it harder for pathogens to develop resistance and may help preserve microbial diversity in the soil.
The research team now plans to move to field trials, where the focus will be production scalability, storage requirements, and the cost of putting the treatment into practice.
The study, carrying DOI 10.3389/fpls.2025.1731535, offers hope for cutting losses in an industry that is central to Latin America's economy. The included image of diseased cocoa pods, credited to Mirian Villavicencio of CIBE-ESPOL, illustrates the challenge local farmers are up against.
Turning to natural biological treatments like this emulsion could be an important step in stabilizing a cocoa industry that is under constant pressure from multiple threats.
Ultimately, the work highlights the value of agricultural innovation in reducing environmental damage compared with conventional pest and disease management. If the field trials succeed, Latin American cocoa farmers may gain new opportunities and the region's cocoa production could become more resilient.
As researchers explore innovative solutions to combat cocoa diseases, understanding the genetic diversity of cocoa plants is equally crucial. Recent findings reveal previously unidentified genetic lineages of cocoa in Peru, which could play a significant role in enhancing crop resilience and supporting the future of chocolate production.