UAV spraying on citrus crop : impact of tank-mix adjuvant on the contact angle and droplet distribution

Funding This research was funded by ‘2021 Anyang Science and Technology Project’ (Project No. 2021C01NY037), ‘Henan Science and Technology Project’ (Project No. 202102110114), ‘UK Science and Technology Facilities Council (STFC) under Newton fund (Project No. ST/V00137X/1)’, ‘Royal Society funding (Project No. IEC\NSFC\191320)’, and ‘Talent introduction project of high-end foreign experts in Henan Province’ (Project No. HNGD2021019). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Special thanks to Mr. Haixiong Chen from DJI company for the support on providing and operating the UAVs during the field experiments.Peer reviewedPublisher PD