August 03, 1921

Lt. John A. Macready, flying a Curtiss JN-6 “Jenny” fitted with a 32-gallon hopper tank filled with insecticide dust, performs the world’s first successful aerial crop dusting. The spray system is devised to save a grove of catalpa trees near Troy, Ohio, being devoured by Catalpa Sphinx caterpillars. Flying at 20 to 35 feet back and forth over the trees, Macready spreads the dust completely and all the caterpillars are killed within 46 hours.