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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Parks, W. J.;
Bridges, D. C. |
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| Author Affiliation: | University of Georgia, Griffin, GA 30223 |
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| Title: | Mapping spatial variability of weed control ground cover using a weed-activated sprayer |
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| Section: | Weed management in turf, pastures and rangeland
Other records with the "Weed management in turf, pastures and rangeland" Section
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| Meeting Info.: | 52nd Annual Meeting, Greensboro, NC, January 25-27, 1999 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 75. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Weed control; Ground cover; Percent living ground cover; Application methods; Herbicides; GPS; GIS; Spraying; Product profile; Weed density; Measurement; Estimation
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| Abstract/Contents: | "Most weed management strategies assume random and uniform weed distributions, and decisions are based on a limited number of observations. However, weeds are not randomly distributed, which results in inaccurate herbicide applications. A weed-activated sprayer was used to predict ground cover in three fields in Griffin, GA. The fields were divided into equal transects. In the experiments, ground cover was estimated by making visual estimations of the weeds in a one meter square quadrants and by taking a digital photograph of the quadrant. Image analyses were made using SigmaScan Pro software on a personal computer. Results indicated a high correlation between visual estimates and actual ground cover from the images. Each transect in the fields was sprayed with a Patchenā¢ WeedSeeker sprayer, which was modified with additional electronic equipment including a differentially corrected Global Positioning System to record and map spray instances. Volume measurements were taken after each transect to validate actual spray volumes. Analysis showed a high correlation between the volume measured by the data logging system and actual spray volume. Analysis of the spray and visual data showed poor correlation between them, suggesting that although visual estimates of ground cover were precise, they were not representative of the actual ground cover of the field. Using a modified weed-activated sprayer to map a field is a much better indicator of the actual ground cover than traditional measurement techniques". |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Parks, W. J., and D. C. Bridges. 1999. Mapping spatial variability of weed control ground cover using a weed-activated sprayer. South. Weed Sci. Soc. Proc. 52:p. 75. |
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MSU catalog number: SB 611 .S6 v.52 |
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