Drone for dispersing capsules containing biological active agents for combatting pests, including propulsion means ensuring movement of the aircraft in a horizontal direction parallel with the ground and a capsule distributing and jettisoning system with a vertical ejector, for in-flight ejection of the capsules toward the ground in a direction perpendicular to the horizontal direction of movement of the drone. Taking into account the movement direction of the drone, the vertical ejector is positioned in front of the propulsion means, and the capsule distribution and jettisoning system includes a capsule reservoir which is connected to an element for guiding the capsules toward a capsule counting and metering system including a plate for selecting and separating the capsules, the plate having holes calibrated for the passage of a single capsule toward the vertical jettisoning ejector and being mounted for rotation relative to the vertical ejector via a thrust generating motor.
