While spraying with a drone sprayer in apple orchards or vineyards, what should be the spray rate for proper coverage?
There is always a drones SOP or manual for operational part , it could vary as per policies ..here is one drones amnual for such SOPs...
We have had trials on apple orchards(Georgia, M9, Golden delicious, (4 *1.25 m) Spindel, tree height 2.50 - 2.70 m) of the use of DJI Agras T20 for spraying. According to our trials at least 60 liters are needed for proper spraying per ha. We try several amounts of solutions to identify minimum needed solutions.
The crucial importance is to set up the proper fly height of the drone mission. We identify - that it should be set up sprayer nozzles level (not drone itself) around 10 - 30 cm upper of end of central lider shoot. more height fly does not apply properly for down surface, more down - not good coverage of upper shoots. limitation of drone use is that there are needed make 25 -30 back and force flying per ha, which needed more time for turning in each row.
Still, AgriDrone use of orchard spraying is more focused for small scale orchards, However DJI is improving the capacity of drones - actually, T30 liters already available, as well nozzles and pump efficiencies improving
Anyway, We think this is very important and we are continuing trials and will share our experiences.
Spraying application rates and deposition rates were comparable to the ... crops and orchards for UAVs using a Mutual Subspace Method (MSM).
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