Site-Specific Weed Control in Maize,Sugar Beet,Winter Wheat,and Winter Barley |
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Authors: | Gerhards R Sökefeld M Timmermann C Kühbauch W Williams M M |
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Institution: | (1) Institut für Pflanzenbau, Universität Bonn, Katzenburgweg 5, D-53115 Bonn, Germany;(2) Institut für Pflanzenbau, Universität Bonn, Katzenburgweg 5, D-53115 Bonn, Germany;(3) Department of Agronomy, University of Nebraska-Lincoln, NE 68583-0915, USA |
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Abstract: | A four-year study of site-specific weed control is presented in this paper. Weed seedling distribution was sampled and mapped prior to and after post-emergence herbicide application in four fields planted with maize, sugar beets, winter wheat and winter barley, rotating on one site. Herbicides and other weed control strategies were applied site-specifically according to the spatial variation of weed populations. Different decision algorithms were used for chemical weed control methods in each crop. A weed treatment map was created to direct location and dosage of herbicide application. The sprayer was coupled with a differential Global Positioning System (DGPS). The solenoid valves of the sprayer were opened automatically when the tractor entered a weed patch characterized in the weed treatment map. For site specific herbicide application, a patch sprayer was developed that allowed variable rate application and the selective control of each section of the spray boom. |
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Keywords: | site-specific weed management patch spraying digital image analysis |
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