Spot spraying reduces herbicide concentrations in runoff
Melland, Alice R., Silburn, D. Mark, McHugh, Allen D., Fillols, Emilie, Rojas-Ponce, Samuel, Baillie, Craig, and Lewis, Stephen (2016) Spot spraying reduces herbicide concentrations in runoff. Journal of Agricultural and Food Chemistry, 60 (20). pp. 4009-4020.
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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.
| Item ID: | 43398 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1520-5118 |
| Keywords: | pesticide, water quality, sugar cane, precision spraying, postemergent, pre-emergent, sediment−water partition coefficien |
| Funders: | Paddock to Reef Integrated Monitoring, Modeling and Reporting Program (PRIMMRP), Reef Rescue Research and Development (RRRD), Reef Water Quality Research and Development Science Program (RWQRDSP), Sugar Research Australia (SRA), Bob Packett (BP) |
| Projects and Grants: | RRRD037, RRRD038, RWQRDSP RP56C, SRA Project NCA011 |
| Date Deposited: | 20 Mar 2016 23:47 |
| FoR Codes: | 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 50% 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3002 Agriculture, land and farm management > 300210 Sustainable agricultural development @ 50% |
| SEO Codes: | 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments @ 50% 96 ENVIRONMENT > 9609 Land and Water Management > 960904 Farmland, Arable Cropland and Permanent Cropland Land Management @ 50% |
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