In 2007 and 2008, field trials were carried out with different standard and drift-reducing nozzles in sugar beet, maize, chicory, Belgian endive (all herbicide applications), wheat (fungicide application) and potatoes (Haulm killing herbicide application). The effect of nozzle type (standard flat fan, low-drift flat fan, air injection), nozzle size (ISO 02, 03 and 04) and application volume on the biological efficacy was investigated. All applications were done using a plot sprayer with volume rates ranging from 160 to 320 l.ha(-1) at recommended dose rates with commonly used (mix of) plant protection products. For each crop, the experiments included four replicates in a randomized block design. Depending on the type of application, the efficacy was measured in terms of weed control, disease and yield level, percentage dead leaf and stem, etc. In a previous research, drift and droplet characteristics of the different techniques were measured. In general no important effect of application technique on biological efficacy was observed for the tested herbicide and fungicide applications within the interval of volume rates and droplet size tested. Drift-reducing nozzles performed similar as conventional nozzles under good spraying conditions and using a correct spray application technique.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
An algae-based polymer material as a pesticide adjuvant for mitigating off-target drift.
Heliyon
August 2024
Pollinator Health in Southern Crop Ecosystem Research Unit, United States Department of Agriculture-Agricultural Research Service, Stoneville, MS, 38776, USA.
Off-target pesticide drift from cropland is a major source of pesticide exposure to pollinating insects inhabiting crop and wildlands in the lower Mississippi Delta (LMD) in the USA. This study is aimed to develop a drift-reducing pesticide adjuvant that is less/nontoxic to honeybees. Ongoing toxicology experiments with two widely-used insecticides and sodium alginate (SA) pointed out reductions in honeybee mortality compared to an industry standard reference polyacrylamide (PAM).
View Article and Find Full Text PDFHooded broadcast sprayer for particle drift reduction.
Pest Manag Sci
April 2022
Department of Agronomy, University of Wisconsin-Madison, Madison, WI, USA.
Background: There is renewed interest amongst crop protection professionals and regulators in the adoption of spray hoods to further reduce pesticide off-target movement during applications. Although the benefits of sprayer hoods have been reported since the early 1950s, adoption has been relatively low among farmers and applicators. The objective of this study was to evaluate the effectiveness of spray hoods in reducing pesticide drift of spray solutions from nozzles typically used for herbicide applications in row crops with tolerance to dicamba or 2,4-D.
View Article and Find Full Text PDFDoes polyacrylamide-based adjuvant actually reduce primary drift of airborne pesticides?
Sci Total Environ
June 2021
Faculty of Civil and Environmental Engineering, Israel Institute of Technology (Technion), Haifa, Israel. Electronic address:
Atmospheric drift of pesticides sprayed outside treated fields may pose serious environmental and health concerns. Chemical adjuvants, among other techniques, reduce drift by modifying the physicochemical properties of the pesticide solution, which presumably produces larger droplets upon spraying that are less prone to drift. Previous studies, that have addressed the effect of adjuvants on drift reduction, mainly rely on measurements of droplet sedimentation while ignoring the presence of pesticides in the forms of small aerosols and vapor.
View Article and Find Full Text PDFSpray Drift from Three Airblast Sprayer Technologies in a Modern Orchard Work Environment.
Ann Work Expo Health
January 2020
Department of Environmental and Occupational Health Sciences, University of Washington School of Public Health, WA, USA.
Pesticide spray drift represents an important exposure pathway that may cause illness among orchard workers. To strike a balance between improving spray coverage and reducing drift, new sprayer technologies are being marketed for use in modern tree canopies to replace conventional axial fan airblast (AFA) sprayers that have been used widely since the 1950s. We designed a series of spray trials that used mixed-effects modeling to compare tracer-based drift volume levels for old and new sprayer technologies in an orchard work environment.
View Article and Find Full Text PDFSpray pesticide applications in Mediterranean citrus orchards: Canopy deposition and off-target losses.
Sci Total Environ
December 2017
Centro de Agroingeniería, Instituto Valenciano de Investigaciones Agrarias (IVIA); CV-315, km. 10,7; E-46113 Moncada, Valencia, Spain. Electronic address:
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.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!