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Comparison of water-sensitive paper, Kromekote and Mylar collectors for droplet deposition with a visible fluorescent dye solution

100%

Ferguson J. C., Hewitt A. J., O`Donnell C. C., Kruger G. R.

Journal of Plant Protection Research

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2020

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tom 60

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nr 1

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Wind tunnel flux comparisons using a phase Doppler interferometer

88%

Roten R. L., Post S. L., Werner A., Safa M., Hewitt A. J.

Journal of Plant Protection Research

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2017

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tom 57

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nr 3

It is essential to know the movement of droplets in time and space (i.e. flux) when measuring and/or predicting spray drift in agricultural application. A study was performed to assess the flux measurements of a phase Doppler system against a standard monofilament system in a wind tunnel. The primary objectives of the study were to compare flux from a new phase Doppler system against 1.7 mm cotton and 2.0 mm nylon strings at varying wind speeds (1.4, 4.2, 8.3, 12.5, and 16.7 m ⋅ s–1) and spray exposures times (5, 10, 15, 30, and 60 s) with an overarching hypothesis that the active, phase Doppler is able to accurately measure the flux regardless of exposure and spray mass whereas the static string samplers are limited to a maximum retention. The phase Doppler did measure linearly as expected, however strings did not reach a point in which they loss mass; conversely, they appeared to overload with saturation. These findings are believed to be among many variables which influence the variability of previous mass balance studies.

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Developing a comprehensive Drift Reduction Technology risk assessment scheme

76%

Ferguson J. C., Hewitt A. J., Eastin J. A., Connell R. J., Roten R. L., Kruger G. R.

Journal of Plant Protection Research

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2014

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tom 54

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nr 1

Drift Reduction Technologies (DRTs) are becoming increasingly important for improving spray applications in many countries including New Zealand (NZ). Although there is a growing database on the performance of DRTs, there is no rating system showing the effectiveness of the DRT’s performance. In Europe, DRTs are classified relative to current reference technologies as part of the rating systems used to establish spray drift risk reduction. We have recommended some key elements of such a comprehensive exposure risk reduction scheme for any country, based on prior and on-going research into the performance of specific DRTs in row, tree, and vine crops. Our intention was to create a rating system to determine the effectiveness of a given technology. This rating system would improve spray application practices and environmental stewardship for a wide range of crops and application scenarios.

Ograniczanie wyników

3 Journal of Plant Protection Research

3 Hewitt A. J.

2 Ferguson J. C.

2 Kruger G. R.

2 Roten R. L.

1 Connell R. J.

1 Eastin J. A.

1 O`Donnell C. C.

1 Post S. L.

1 Safa M.

1 Werner A.

1 2020

1 2017

1 2014

Comparison of water-sensitive paper, Kromekote and Mylar collectors for droplet deposition with a visible fluorescent dye solution

Wind tunnel flux comparisons using a phase Doppler interferometer

Developing a comprehensive Drift Reduction Technology risk assessment scheme