Quantifying pesticide deposits and spray patterns at micro-scales on apple (Malus domesticus) leaves with a view to arthropod exposure

Pest Management Science
Joanna T WittonRoman Ashauer

Abstract

Pesticides used in commercial crop systems can adversely affect non-target arthropod populations. The spatial distribution of pesticide residues is rarely studied at scales relevant to these populations. Here, we combine two methods for assessing pesticide spray deposits at spatial scales relevant to non-target arthropods found in apple orchards. Pesticide residues were determined on individual apple leaves through conventional residue analysis; water-sensitive paper was used to investigate spatial distributions in deposits at the micro-scale. We also evaluated how accurately a digital image analysis program estimated pesticide residues. We found that mean pesticide spray coverage on water-sensitive paper varied by up to 6.1% (95% CI 9.4%, 2.7%) within an apple orchard, and leaf residues varied by up to 0.95 (95% CI 0.54, 1.36) mg kg-1 within a tree. Leaf residues based on analytical chemistry were six times lower than pesticide deposition estimated through image analysis of water-sensitive paper, although these correlated strongly. This correlation allowed estimation of actual residues by application of a correction factor. Our method demonstrates accurate estimation of pesticide deposits at the individual leaf scale through d...Continue Reading

References

Sep 11, 2002·Annual Review of Entomology·John D Stark, John E Banks
May 31, 2003·Food Additives and Contaminants·A AngioniP Cabras
Feb 19, 2004·Journal of Agricultural and Food Chemistry·Gregory L HallTakayuki Shibamoto
Jul 26, 2005·Journal of Chromatography. a·Imma FerrerAmadeo R Fernánndez-Alba
Jul 18, 2006·Annual Review of Entomology·Nicolas DesneuxJean-Marie Delpuech
Jul 19, 2006·Pest Management Science·Xiangming XuKieran Hyder
Mar 18, 2008·Journal of Chromatography. a·Rosa Ma González-RodríguezJesús Simal-Gándara
Oct 15, 2013·Environmental Toxicology and Chemistry·Olugbenga J OwojoriJoerg Roembke
Apr 2, 2015·Environmental Science & Technology·Suresh P AnnangudiJeffrey R Gilbert

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Citations

Nov 26, 2019·Colloids and Surfaces. B, Biointerfaces·Yue GaoRenjun Fan
Sep 25, 2020·Journal of Agricultural and Food Chemistry·Dengke HuaQingjun Wu

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Software Mentioned

DepositScan
Irfanview
Turbomass
ImageJ
WSP

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