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Additional field spray drift studies with modern application practices to inform policy on setting of buffer zones in the UK. - PS2022

As part of the current review of unsprayed buffer zones and potential harmonisation with other EU member states, FERA and SSAU are involved with projects PS2015 and PS2017. This is generating new datasets for the modern operating conditions of boom width, boom height and forward speed under field conditions. The initial data from these field studies indicated levels of drift between those reported in the Netherlands by van de Zande and those reproted by Rautman et al. and previous CSL field studies (1995-2001).
The datasets with PS2015 generated with a short crop, would benefit from extra datasets at the 0.5m boom height at the forward speeds of 12 and 16 kph. This would allow the effects of boom height and forward speed to be evaluted using data from previous CSL field studies carried out at the 8kph forward speed.

The previous study by CSL (PA1728) and the on-going PS2017 provide data for levels of spray drift from spraying a mature cereal crop. Extra datasets need to added to the those already planned for PS2017 to take into account the use of AI nozzles, and the effect of using an end nozzle on a boom with traditional flat fan nozzles. The data with the AI nozzle will also provide further support for the LERAP scheme, in extrapolating form wind tunnel to field senarios.

The filling of this data gap will inform the setting of unsprayed buffer zones (UBZs) in the UK, and in addition to providing supporting key information for aquatic risk assessments, would generate extra information for potential bystander exposure in conjunction with the BREAM project.

The primary objective of the work will be to generate data for airborne and ground deposited spray drift arising from typical arable current spraying practices, with tractor forward speeds of >10k/h and boom heights of 0.5 (and greater) above both short and tall cereal crops with sprayers having a boom width of 24m.
1. Generate data for 3 extra nozzle configurations at 2 boom heights and forward speeds for ground deposited and airborne drift at distances up to 20m downwind of the treated area consisting of either a mature cereal crop or a short crop representative of cereals before GS 31.
2. Provide an evaluation of the data for use by PSD investigating the setting of unsprayed buffer zones for the UK.
Project Documents
• FRP - Final Report : SID5 PS2022 Final Feb 2013   (576k)
Time-Scale and Cost
From: 2009

To: 2010

Cost: £27,898
Contractor / Funded Organisations
The Food & Environment Research Agency
Environmental Impact              
Monitoring and evaluation              
Pest and Weed Control              
Pesticide use              
Plants and Animals              
Fields of Study
Pesticide Safety