An appraisal of nozzles and sprayers abilities to meet regulatory demands for reduced airborne drift and downwind fallout from arable crop spraying
文献类型： 会议论文
第一作者： W A Taylor
作者： W A Taylor 1 ; S E Cooper 2 ; P C H Miller 3 ;
作者机构： 1.Hardi International A/S, Helgeshoj Alle 38, Taastrup, DK 2630, Denmark
2.Harper Adams University College, Newport, Shropshire, TF10 8NB, UK
3.Silsoe Research Institute, Wrest Park, Silsoe, Bedford, MK45 4HS, UK
关键词： nozzles;sprayers;airborne drift;arable crop spraying;agrochemical spray drift
会议名称： The 1999 Brighton conference weeds,proceedings of an international conference held at the Brighton Metropole Hotel Brighton,UK 15-18 Nov 1999:,Vol.2, no.15-18
主办单位：
页码： 447-452
摘要： Until recently, the emphasis in agrochemical spray drift studies was on the airborne component, but legislation now concentrates on downwind fallout. This paper describes measurements of both components in a wind-tunnel and in the field. The effect of spray quality dominated that of operating pressure and wind speed for conventional nozzles, while drift-reducing pre-orifice and air-inducing nozzles reduced drift losses by more than 75 % at equivalent outputs. Drift reduction via nozzle design alone may be associated with coarser sprays than BCPC Coarse, raising deposition and efficacy questions. In contrast, air assistance allows the use of the spray quality given on the agrochemical label while still reducing drift. Air assistance improved all nozzles' performance further; for example, with drift-reducing nozzles fallout was up to 95% reduced compared to a conventional F110/1.6/3.0 nozzle without air assistance.
分类号： S451
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