A recent study has investigated the impact of airflow generated by the rotors of unmanned aerial vehicles (UAVs) used for crop protection on the effectiveness of pesticide application in rice fields. The research focused on how the interaction between the drone's downward air jet and the rice plant structure affects pesticide distribution and penetration, a crucial factor for optimizing spraying and reducing excessive chemical use.

Traditionally, pesticide application has been carried out by ground spraying or aerial spraying with manned aircraft, but drones offer advantages such as greater precision, lower operating costs, and the ability to operate in difficult terrain. However, the airflow from their rotors can significantly alter the spray pattern, leading to uneven distribution or product drift, which decreases effectiveness and can create environmental problems.

The researchers employed a combination of field measurements and simulations to analyze the dynamics of airflow and its effect on pesticide droplets. Different flight heights and drone speeds, as well as rice crop density, were evaluated to determine the optimal conditions that maximize pesticide deposition on leaves and minimize losses. The results provide valuable guidelines for adjusting drone flight parameters, improving spraying efficiency and contributing to more sustainable agriculture.