On July 10, 2026, he asked the app for a complete weed-and-pest control plan for his sesame seedlings and specifically requested a version designed for drone spraying. Wu mixed the chemicals as instructed and had a drone spray the full 150 mu—roughly 24.7 acres—without consulting local agricultural experts or running a small test plot first. When he returned to the AI to ask what had gone wrong, the system itself identified fomesafen as the primary cause. Local agricultural technicians and pesticide dealers confirmed the problem. Applying it across an entire sesame crop by drone left little chance of survival.