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Silsoe, United Kingdom

Butler Ellis M.C.,Silsoe Spray Application Unit | Lane A.G.,Silsoe Spray Application Unit | O'Sullivan C.M.,Silsoe Spray Application Unit | Miller P.C.H.,Silsoe Spray Application Unit | Glass C.R.,UK Environment Agency
Biosystems Engineering | Year: 2010

Experimental measurements were made of airborne spray, ground deposits and potential bystander dermal exposure under field conditions, using application techniques representative of those typically used in UK arable crops. Measured values of bystander dermal exposure were greater than those currently used in the UK regulatory risk assessment (Lloyd & Bell, 1983). This was as expected since compared with the earlier study a greater boom height and reduced distances between bystander and sprayer were used. Measurements of airborne spray were correlated with measurements of bystander exposure in order to define the relationship between the two so that model predictions of airborne spray can be mapped to bystander dermal exposure in the Bystander and Residential Exposure Assessment Model (BREAM). © 2010 IAgrE.


Butler Ellis M.C.,Silsoe Spray Application Unit | Underwood B.,Ricardo PLC | Peirce M.J.,Ricardo PLC | Walker C.T.,Ricardo PLC | Miller P.C.H.,Silsoe Spray Application Unit
Biosystems Engineering | Year: 2010

Evaluation of the potential exposure of bystanders and residents to pesticide vapour emitted from treated agricultural fields is an important component of risk assessment in the pesticide approval process. The information available for the development of a revised exposure assessment is reviewed and a new methodology proposed. Dispersion of vapours downwind of the treated field can be successfully modelled using commercially-available software, although there is no agreed method for predicting the emission of pesticide vapours from a treated field. The proposed exposure assessment model separates the emission of pesticide vapour from its downwind dispersion, allowing the latter to be tailored to UK conditions by using representative meteorological data. More work is needed to develop an appropriate model of emissions that can take into account environmental conditions and physico-chemical properties of the formulation. © 2010 IAgrE.

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