The accuracy and uniformity of pesticide application is greatly influenced by the condition of spray nozzles. Their performance is affected by the hardness of materials from which they are made, the extent of their use, the abrasiveness of spray formulations, and the way they are cleaned and handled. Nozzle performance was tested utilizing a KZCO Spray Tech bench-top nozzle testing console. This proved to be an effective and convenient device to measure nozzle capacity and to demonstrate the effect of wear on nozzle capacity. Worn nozzles contribute to pesticide pollution and residue proplems. Residue levels were tested using an Enzytec Pesticide Detector Ticket technique. This is a quick and economical color method based upon the principle of cholinesterase inhibition.


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