In this episode, David interviews Prof. Baoua about his remarkable 20-year effort to combat the millet head miner in the Sahel. He recounts how he developed a biological control method using a natural enemy, habrobracon hebetor, and empowered local farmers to deploy it. Supported by the McKnight Foundation, their project scaled to protect over 1.5 million hectares, transforming regional agriculture and turning a pest crisis into a sustainable solution.