Extreme Rainfall Emerges as Primary Threat to Global Cocoa Yields

• Extreme rainfall is identified as a more significant threat to cocoa production than rising temperatures or water shortages.
• Nearly six million farmers worldwide depend on cocoa, making production shortfalls a critical risk to their livelihoods.
• Researchers from Harvard University analyzed data from Ghana, Indonesia, and Ecuador to establish the link between heavy precipitation and crop loss.

Mechanisms of Crop Damage

• Physical impact: Intense rain and wind damage flowers and young cocoa pods.
• Pollination disruption: Heavy downpours hinder the insects required for pollination.
• Fungal disease: Prolonged humidity promotes diseases like black pod; fungal spores are spread by rain splashing.

Climate Factors and El Niño

• Rainfall patterns are often influenced by large-scale phenomena such as El Niño.
• During El Niño, Ecuador's coast faces increased risks of severe, yield-impacting rainfall between February and April.
• West Africa, which produces 70% of the global cocoa supply, is experiencing intensifying wet-season rainfall independently of El Niño cycles.

Mitigation and Farmer Support

• Experts emphasize that farm-level factors—such as clone susceptibility, shade management, and pruning quality—significantly influence how rainfall affects individual yields.
• Researchers are collaborating with local partners to translate climate forecasts into actionable warnings for farmers.
• Actionable steps include optimizing timing for drainage preparation, sanitation work, and the application of fungicides based on weather alerts.