Spot spraying reduces herbicide concentrations in runoff
Article
Article Title | Spot spraying reduces herbicide concentrations in runoff |
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ERA Journal ID | 1349 |
Article Category | Article |
Authors | Melland, Alice R. (Author), Silburn, D. Mark (Author), McHugh, Allen D. (Author), Fillols, Emilie (Author), Rojas-Ponce, Samuel (Author), Baillie, Craig (Author) and Lewis, Stephen (Author) |
Journal Title | Journal of Agricultural and Food Chemistry |
Journal Citation | 64 (20), pp. 4009-4020 |
Number of Pages | 12 |
Year | 2016 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 0021-8561 |
1520-5118 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acs.jafc.5b03688 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acs.jafc.5b03688 |
Abstract | Rainfall simulator trials were conducted on sugar cane paddocks across dry-tropical and subtropical Queensland, Australia, to examine the potential for spot spraying to reduce herbicide losses in runoff. Recommended rates of the herbicides glyphosate, 2,4-D, fluoroxypyr, atrazine, and diuron were sprayed onto 0, 20, 40, 50, 70, or 100% of the area of runoff plots. Simulated rainfall was applied 2 days after spraying to induce runoff at one plant cane and three ratoon crop sites. Over 50% of all herbicides were transported in the dissolved phase of runoff, regardless of the herbicide’s sediment−water partition coefficient. For most sites and herbicides, runoff herbicide concentrations decreased with decreasing spray coverage and with decreasing herbicide load in the soil and cane residues. Importantly, sites with higher infiltration prior to runoff and lower total runoff had lower runoff herbicide concentrations. |
Keywords | pesticide; water quality; sugar cane; precision spraying; postemergent; pre-emergent; sediment−water partition coefficient |
ANZSRC Field of Research 2020 | 300201. Agricultural hydrology |
300499. Crop and pasture production not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | National Centre for Engineering in Agriculture |
Chinese Academy of Agricultural Sciences, China | |
Sugar Research Australia, Australia | |
Department of Natural Resources and Mines, Queensland | |
James Cook University | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3y1x/spot-spraying-reduces-herbicide-concentrations-in-runoff
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