Spray pesticide applications in Mediterranean citrus orchards: Canopy deposition and off-target losses

The Science of the Total Environment
Cruz GarceráP Chueca

Abstract

Only a portion of the water volume sprayed is deposited on the target when applying plant protection products with air-assisted axial-fan airblast sprayers in high growing crops. A fraction of the off-target losses deposits on the ground, but droplets also drift away from the site. This work aimed at assessing the spray distribution to different compartments (tree canopy, ground and air) during pesticide applications in a Mediterranean citrus orchard. Standard cone nozzles (Teejet D3 DC35) and venturi drift reducing nozzles (Albuz TVI 80 03) were compared. Applications were performed with a conventional air-assisted sprayer, with a spray volume of around 3000lha-1in a Navel orange orchard. Brilliant Sulfoflavine (BSF) was used as a tracer. Results showed that only around 46% of the applied spray was deposited on the target trees and around 4% of the spray was deposited on adjacent trees from adjoining rows independently of the nozzle type. Applications with standard nozzles produced more potential airborne spray drift (23%) than those with the drift reducing nozzles (17%) but fewer direct losses to the ground (22% vs. 27%). Indirect losses (sedimenting spray drift) to the ground of adjacent paths were around 7-9% in both cases....Continue Reading

Citations

Jan 8, 2018·Environmental Science and Pollution Research International·Pengqiang DuYongquan Zheng
Jul 1, 2017·International Journal of Environmental Research and Public Health·Cruz GarceráPatricia Chueca
Jul 2, 2018·Applied Microbiology and Biotechnology·Claudia PreiningerTeresa Berninger
May 22, 2020·The Science of the Total Environment·Farshad SoheilifardRosalie van Zelm
Jan 28, 2020·The Science of the Total Environment·Xavier TorrentSantiago Planas
Feb 26, 2021·The Science of the Total Environment·Doron KatzmanYael Dubowski
Mar 5, 2021·Chemosphere·Céline Gentil-SergentPeter Fantke
Jul 17, 2020·Heliyon·Lisandro Agost, Guillermo Angel Velázquez

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