Search Results - "Walklate, P.J"

Regulated dose adjustment of commercial orchard spraying products by Walklate, P.J., Cross, J.V.

“…A generalised model of regulated dose adjustment is formulated to examine the potential for reducing the usage of commercial orchard spraying products. The…”
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Support system for efficient dosage of orchard and vineyard spraying products by Walklate, P.J., Cross, J.V., Pergher, G.

“…▶ Label dose rates do not fully support the efficient use of pesticide for orchard and vineyard spraying. ▶ This research establishes a system to improve…”
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Optimising the adjustment of label-recommended dose rate for orchard spraying by Walklate, P.J., Cross, J.V., Richardson, G.M., Baker, D.E.

“…Concern for human safety and environmental contamination due to the inefficient use of plant protection products for orchard spraying has resulted in a range…”
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An examination of Leaf-Wall-Area dose expression by Walklate, P.J., Cross, J.V.

“…This paper examines some of the consequences of adopting the Leaf-Wall-Area (LWA) method of dose expression for the registration of plant protection products…”
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Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer: 1. Effects of spray liquid flow rate by Cross, J.V, Walklate, P.J, Murray, R.A, Richardson, G.M

“…Spray deposit and off-target contamination distribution measurements were made in apple trees of different sizes and row spacings for an axial fan sprayer with…”
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Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer: 3. Effects of air volumetric flow rate by Cross, J.V, Walklate, P.J, Murray, R.A, Richardson, G.M

“…As part of a wider study to optimise the adjustment of axial fan orchard sprayers to suit differing modern crop structures, three field experiments compared…”
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Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer: 2. Effects of spray quality by Cross, J.V., Walklate, P.J., Murray, R.A., Richardson, G.M.

“…Two field experiments compared spray deposits and losses from very fine (volume median diameter (VMD)=156 μm), fine (VMD=198 μm) and medium (VMD = 237 μm)…”
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model of pollen-mediated gene flow for oilseed rape by Walklate, P.J, Hunt, J.C.R, Higson, H.L, Sweet, J.B

“…The development of genetically modified (GM) crops has precipitated the need for risk assessment and regulation of pollen–mediated gene flow. In response to…”
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IT—Information Technology and the Human Interface by Walklate, P.J., Cross, J.V., Richardson, G.M., Murray, R.A., Baker, D.E.

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IT—Information Technology and the Human Interface: Comparison of Different Spray Volume Deposition Models Using LIDAR Measurements of Apple Orchards by Walklate, P.J., Cross, J.V., Richardson, G.M., Murray, R.A., Baker, D.E.

“…This paper reviews the models of spray volume deposition that have been developed to enable the adjustment of pesticide output from an axial fan sprayer to…”
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generic method of pesticide dose expression: Application to broadcast spraying of apple trees by Walklate, P.J, Cross, J.V, Richardson, G.M, Baker, D.E, Murray, R.A

“…Summary The recommended dose for many pesticides is expressed as a constant mass or volume per unit ground area covered by the crop. This method of dose…”
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The role of rain in dispersal of pathogen inoculum by Fitt, B.D.L. (AFRC Institute of Arable Crops Research, Rothamsted Experimental Station, Hertfordshire, UK), McCartney, H.A, Walklate, P.J

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Stochastic modelling of turbulent spray dispersion in the near-field of orchard sprayers by Xu, Z.G, Walklate, P.J, Rigby, S.G, Richardson, G.M

“…A Lagrangian approach is adopted to study the turbulent dispersion of spray droplets in the near-field of air-assisted orchard sprayers. In order to compute…”
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The effect of orchard crop structure on the integral length-scale of turbulence by WALKLATE, P. J

“…The integral length-scales L for the three orthogonal components of diffusivity K= sigma L are derived from spectral analysis of velocity time series…”
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Analysis of and Experimental Measurements made on a Moving Air-Assisted Sprayer with Two-Dimensional Air-Jets Penetrating a Uniform Crop Canopy by Walklate, P.J., Weiner, K.-L., Parkin, C.S.

“…Air-assisted crop sprayers use air-jets to enhance the transport and deposition of agricultural pesticides in crops that are difficult to spray using…”
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Prediction of Spray Angle from Flat Fan Nozzles by Zhou, Q., Miller, P.C.H., Walklate, P.J., Thomas, N.H.

“…This paper presents a numerical approach to relate the spray angle of a flat fan nozzle to its internal geometry. The effect of changing four parameters, the…”
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