was used in this experiment and its key parameters are as
follows: the container capacity 6 L, spray swath 4.0-6.0 m,
relative flight height to canopy 0.5-3.0 m, operation speed
0-8.0 m/s, particle size ranges from 80 μm to 120 μm.
There are four conical spray nozzles arranged in a row,
and its spray volume is 1000-1300 mL/min. Both the
working height and operating speed can be adjusted
according to the requirements.