In order to improve the spray coverage in canopy,to reduce the loss of pesticide out of the tree,and reduce the effect of pesticde spray on the environment,the target-detecting spray experiments were conducted for two hollow cone nozzles horzontalled to study the effcets of the spray pressure and the travel speed on the solution distribution.

A theoretical calculation method for flow rate coefficient and hydraulic parameters of conical nozzle;

Calculation and experimental comparison for conical nozzles in submerged cavitating water jet;