Abstract
Site-specific weed management can include both limiting herbicide application to areas of the field where weed pressure is above the economic threshold (patch spraying) and varying the choice of herbicide for most cost-effective weed control of local populations. The benefits of patch spraying with several, postemergence herbicides in irrigated corn were evaluated in simulation studies using weed counts from 16 fields. Patch spraying with one, two or the number of herbicides that maximized net return for a field was simulated. With patch spraying of one herbicide, the average area of a field left untreated is 34.5%. Net return increases by $3.09 ha−1 compared to a uniform application without decreasing crop yield. Additional herbicides increase the average benefits with just 4% more of the field treated. With two herbicides, the increase in net return is almost tripled and herbicide use is reduced nearly 10-fold compared to patch spraying with one herbicide, and weed control is better than the uniform application in 10 fields. Using more than two herbicides for patch spraying further reduces weed escapes, but herbicide use is greater than a uniform application in 10 fields. Growers might be more willing to adopt patch spraying if more than one herbicide is used in a field.
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References
Beck, K. G., McDonald, S. K., Nissen, S. J., Westra, P., & Oman, C. C. (2003). Colorado 2004 weed management guide. Publication XCM-205 (pp. 33–43). Fort Collins, Colorado: Colorado State University Cooperative Extension Service.
Gaussoin, R. E., Kappler, B. F., Klein, R. N., Knezevic, S. Z., Lyon, D. J., Martin, A. R., et al. (2005). 2005 Weed management guide publication EC04–130-D (pp. 45–60). Lincoln, Nebraska: University of Nebraska Cooperative Extension.
Gerhards, R., & Oebel, H. (2006). Practical experiences with a system for site-specific weed control in arable crops using real-time image analysis and GPS-controlled patch spraying. Weed Research, 46, 185–193. doi:10.1111/j.1365-3180.2006.00504.x.
Gerhards, R., Sokefeld, M., Schulze-Lohne, K., Mortensen, D. A., & Kuhbauch, W. (1997). Site specific weed control in winter wheat. Journal of Agronomy and Crop Science, 178, 219–225. doi:10.1111/j.1439-037X.1997.tb00494.x.
Johnson, G. A., Mortensen, D. A., & Martin, A. R. (1995). A simulation of herbicide use based on weed spatial distribution. Weed Research, 35, 197–205. doi:10.1111/j.1365-3180.1995.tb02033.x.
Lamastus-Stanford, F. E., & Shaw, D. R. (2004). Evaluation of site-specific weed management implementing the herbicide application decision support system. (HADSS). Precision Agriculture, 5, 411–426. doi:10.1023/B:PRAG.0000040808.78546.d5.
Lybecker, D. W., Schweizer, E. E., & King, R. P. (1991). Weed management decisions in corn based on bioeconomic modeling. Weed Science, 39, 124.
Lybecker, D. W., Schweizer, E. E., & Westra, P. (1993). Computer decision aid for managing weeds in irrigated corn. In Agricultural Research to Protect Water Quality (p. 295). Minneapolis, Minnesota: Soil and Water Conservation Society.
Nordmeyer, H. (2006). Patchy weed distribution and site-specific weed control in winter cereals. Precision Agriculture, 7, 219–231. doi:10.1007/s11119-006-9015-8.
Rider, T. W., Vogel, J. W., Dille, J. A., Dhuyvetter, K. C., & Kastens, T. L. (2006). An economic evaluation of site-specific herbicide application. Precision Agriculture, 7, 379–392. doi:10.1007/s11119-006-9012-y.
Timmermann, C., Gerhards, R., & Kühbauch, W. (2003). The economic impact of site-specific weed control. Precision Agriculture, 4, 249–260. doi:10.1023/A:1024988022674.
Tredaway-Ducar, J., Morgan, G. D., Wilkerson, J. B., Hart, W. E., Hayes, R. M., & Mueller, T. C. (2003). Site-specific weed management in corn (Zea mays). Weed Technology, 17, 711–717. doi:10.1614/WT02-119.
Wiles, L. J., Bobbitt, R., & Westra, P. (2007). Site-specific Weed management in growers’ fields: predictions from hand drawn maps. In F. Pierce & D. Clay (Eds.), Applications of GIS for agriculture (Vol. I, pp. 81–101). Boca Raton, Florida: CRC Press.
Wiles, L. J., King, R. P., Schweizer, E. E., Lybecker, D. W., & Swinton, S. M. (1996). GWM: General weed management model. Agricultural Systems, 50, 355. doi:10.1016/0308-521X(95)00016-X.
Wiles, L. J., & Schweizer, E. E. (1999). The cost of counting and identifying weed seeds and seedlings. Weed Science, 47, 667–673.
Wilkerson, G. G., Price, A. J., Bennett, A. C., Krueger, D. W., Roberson, G. T., & Robinson, B. L. (2004). Evaluating the potential for site-specific herbicide application in soybean. Weed Technology, 18, 1101–1110. doi:10.1614/WT-03-258R.
Williams, M. M., II, Gerhards, R., & Mortensen, D. A. (2000). Two-year weed seedling population responses to a post-emergent method of site-specific weed management. Precision Agriculture, 2, 247–326. doi:10.1023/A:1011886722418.
Wyse-Pester, D. Y., Wiles, L. J., & Westra, P. (2002). Infestation and spatial dependence of weed seedling populations in corn fields. Weed Science, 50, 54–56. doi:10.1614/0043-1745(2002)050[0054:IASDOW]2.0.CO;2.
Acknowledgment
The author wishes to thank Dr. Mark Bernards, University of Nebraska, for assistance in obtaining herbicide efficacies.
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Wiles, L.J. Beyond patch spraying: site-specific weed management with several herbicides. Precision Agric 10, 277–290 (2009). https://doi.org/10.1007/s11119-008-9097-6
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DOI: https://doi.org/10.1007/s11119-008-9097-6