Investigating the variance of downwind spray deposits

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic


Spray applications in arable crops cause off-target spray deposits downwind from the treated field. Throughout several decades, many experiments have been carried out by many researchers to quantify these downwind spray deposits and their relation to sprayer settings, field conditions and environmental conditions. Still, there is a large variance in the observed data that cannot be explained satisfactorily by the experimental and environmental conditions. Variance in the data is most likely caused by sprayer boom movements and local fluctuations in driving speed, wind speed and wind direction. Experimentally quantifying the effects of such fluctuations on the variance in spray drift deposits is laborious and expensive. In this study variations in downwind spray deposits caused by sprayer boom movements are investigated based on simulations using the spray drift model IDEFICS. Realistic boom movements can easily result in coefficients of variation of tens of %.
Original languageEnglish
Title of host publicationInternational Advances in Pesticide Application
Place of PublicationWarwick UK
PublisherAssociation of Applied Biologists
Publication statusPublished - 2018
EventInternational Advances in Pesticide Application - Brighton, United Kingdom
Duration: 9 Jan 201811 Jan 2018

Publication series

NameAspects of Applied Biology
PublisherAssociation of Applied Biologists
ISSN (Print)0265-1491


ConferenceInternational Advances in Pesticide Application
Abbreviated titleIAPA
Country/TerritoryUnited Kingdom


  • field trials
  • boom movements
  • spray depositions
  • variance
  • simulations


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