Phase Doppler quantification of agricultural spray compared with traditional sampling materials

  • R.L. Roten Lincoln Agritech Ltd., P.O. Box 69133, Lincoln, Christchurch 7640, NZ
  • S.L. Post Lincoln Agritech Ltd., P.O. Box 69133, Lincoln, Christchurch 7640, NZ
  • A. Werner Lincoln University, P.O. Box 7647, Lincoln, Christchurch 7647, NZ
  • M. Safa Lincoln University, P.O. Box 7647, Lincoln, Christchurch 7647, NZ
  • A.J. Hewitt The University of Queensland, Gatton QLD 4343, Australia
Keywords: spray mass, phase Doppler interferometer, flux, droplet size, velocity

Abstract

The quantification of spray mass has historically been accomplished by means of fluorescent dyes and various string and ground samplers to capture the dye-laden spray. However, these methods are typically not used in close proximity to orchard sprayers and are prone to many sources of error. The objective of this study was to assess the ability of an in-field phase Doppler (pD) interferometer to quantify spray mass against two common string samplers. Measurements were taken at 0.5 m increments to 4.5 m vertically and 1.0 m increments to 5.0 m downwind from the spray. Converted flux measurements from the strings were compared with those obtained using the pD interferometer. The current pD technology was found to be incapable of collecting equivalent flux data to that obtained from the strings. However, the pD equipment did provide useful data on droplet velocity and size.

Published
2017-08-08
How to Cite
Roten, R., Post, S., Werner, A., Safa, M., & Hewitt, A. (2017). Phase Doppler quantification of agricultural spray compared with traditional sampling materials. New Zealand Plant Protection, 70, 142-151. https://doi.org/10.30843/nzpp.2017.70.40
Section
Vol 70 Horticultural Insects 2017