Independent research in the USA reveals how using a swath offset for drone applications and the correct nozzle choice can cut drift to similar levels as a boom sprayer.
Analysis of the research progress on the deposition and drift of spray droplets by plant protection UAVs
Aerial Application Technology Research Sessions - National Agricultural Aviation Association
Frontiers Drones in Insect Pest Management
Rise of the Spray Drone
Frontiers Characteristics of unmanned aerial spraying systems and related spray drift: A review
How to avoid drift during drone spraying - Future Farming
Field evaluation of spray drift and environmental impact using an agricultural unmanned aerial vehicle (UAV) sprayer - ScienceDirect
Drones, Free Full-Text
Exclusive report: Research reveals how to cut drift from spray-drones - Future Farming