New natural emulsion manages to stop fungus that threatens up to 80% of cocoa production

An innovative formulation based on natural compounds could become a sustainable alternative for controlling moniliasis, one of the most devastating diseases affecting cocoa in Latin America. A new study shows that emulsions combining fengycin—a lipopeptide produced by bacteria of the genus Bacillus—with essential oils can significantly inhibit the growth of the fungus Moniliophthora roreri, responsible for losses that can exceed 70–80% of the harvest.

This finding is particularly relevant in a context where cocoa is not only a key crop for the livelihoods of thousands of smallholder farmers, but also a highly demanded product in international markets that increasingly require more sustainable agricultural practices. However, its production faces a persistent threat: the rapid spread and adaptation of pathogens that compromise both grain yield and quality.

Traditionally, moniliasis control has relied on cultural practices and chemical fungicides. Nevertheless, these strategies present important limitations, ranging from variable effectiveness to environmental and human health impacts. In this scenario, the research explores the potential of biocontrol agents as a safer and more sustainable solution.

The proposal is based on a synergistic combination of two natural components. On one hand, fengycin is known for its ability to disrupt fungal cell membranes, inhibiting their growth. On the other hand, essential oils rich in bioactive compounds such as terpenes and phenols also possess antifungal properties. When integrated into an emulsion, these elements enhance each other’s activity, achieving a more effective outcome than when used separately.

One of the key advances of the study is the development of a stable formulation that improves the bioavailability of the active compounds. Emulsions allow for more uniform dispersion, optimizing contact with the pathogen and increasing its inhibitory capacity. In addition, they reduce the volatility of essential oils, prolonging their effect under real application conditions.

Experimental results show that this formulation not only limits the mycelial growth of the fungus, but also interferes with critical processes in its life cycle, such as spore germination. This dual mechanism of action strengthens its potential as an effective tool within integrated disease management strategies.

Unlike conventional fungicides, biocontrol agents present a lower risk of generating resistance in pathogens, positioning them as a viable long-term alternative. Furthermore, their use could reduce dependence on synthetic agrochemicals, contributing to soil biodiversity conservation and the sustainability of agricultural systems.

This type of solution also responds to a global trend: consumers and markets increasingly value products obtained through environmentally responsible practices. For cocoa producers, this represents not only an environmental opportunity, but also an economic one.

However, researchers warn that it is still necessary to validate these results under field conditions. Factors such as humidity, solar radiation, and interactions with other microorganisms could influence the effectiveness of the formulation. It will also be essential to evaluate its large-scale feasibility, including aspects such as production, storage, and implementation costs.

Despite these challenges, the study marks a significant step forward in the search for sustainable alternatives for disease control in cocoa. The combination of natural compounds with advanced formulation technologies opens a new pathway to address one of the main phytosanitary problems affecting this crop.

In a scenario where sustainability is no longer an option but a necessity, innovations like this could redefine how one of the most emblematic crops of the tropics is protected.