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Hamouz, P.
- Impact of Site-Specific Weed Management in Winter Crops on Weed Populations
Abstract Views :57 |
PDF Views:53
Authors
Affiliations
1 Czech University of Life Sciences Prague, Food and Natural Resources, Department of Agroecology and Biometeorology, Kamycka 129, 165 21 Praha-Suchdol, CZ
2 Department of Agroecology and Biometeorology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, CZ
1 Czech University of Life Sciences Prague, Food and Natural Resources, Department of Agroecology and Biometeorology, Kamycka 129, 165 21 Praha-Suchdol, CZ
2 Department of Agroecology and Biometeorology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, CZ
Source
Plant, Soil and Environment, Vol 60, No 11 (2014), Pagination: 518–524Abstract
This work is focused on evaluating the effects of site-specific weed management (SSWM) on weed populations over a 4-year period. SSWM was used on a 3.07 ha experimental field during 2011-2014 in a rotation of winter wheat and winter oilseed rape. The area was split into application cells of 6 × 10 m and weed abundance was evaluated manually in each cell. Four different herbicide treatments were tested. Standard whole-field herbicide application (blanket spraying) was treatment 1. Treatments 2, 3 and 4 comprised SSWM using different thresholds for post-emergent herbicide applications. SSWM resulted in herbicide savings of 6.3-100% for Galium aparine, 0-84.4% for other dicotyledonous weeds, and 31.3-90.6% for annual monocotyledonous weeds. SSWM led to significantly increased density of G. aparine and Tripleurospermum inodorum in the final experimental year when compared to the blanket treatment. Negative correlation coefficients between 2011 and 2014 plant densities found in SSWM treatments (−0.237 to −0.401) indicate that Apera spica-venti does not establish a long-term soil seed bank.Keywords
Weed Thresholds, Patch Spraying, Population Dynamics, Brassica napus L., Triticum aestivum L.Full Text
References
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- Hamouz P., Hamouzova K., Holec J., Tyser L. (2013): Impact of site-specific weed management on herbicide savings and winter wheat yield. Plant, Soil and Environment, 59: 101-107.
- Hamouz P., Hamouzova K., Tyser L., Holec J. (2014): Effect of site-specific weed management in winter crops on yield and weed populations. Plant, Soil and Environment, 60: 27-35.
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- Effect of Site-Specific Weed Management in Winter Crops on Yield and Weed Populations
Abstract Views :138 |
PDF Views:66
Authors
Affiliations
1 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague,Kamycka 129, 165 21 Prague 6-Suchdol, CZ
2 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague, Prague, CZ
3 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague, Prague, Czech Republic, CZ
1 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague,Kamycka 129, 165 21 Prague 6-Suchdol, CZ
2 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague, Prague, CZ
3 Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague, Prague, Czech Republic, CZ
Source
Plant, Soil and Environment, Vol 60, No 1 (2014), Pagination: 27–35Abstract
Site-specific weed management (SSWM) methods allow spatially variable treatment of weed populations according to actual weed abundance, thus offering the opportunity for herbicide savings. However, SSWM's effect on weed population dynamics is not sufficiently understood. In this study, SSWM was conducted based on various application thresholds to analyse the effects on crop yield and weed infestation in the succeeding crop. SSWM was used on a 3.07 ha experimental field in winter wheat (2011) and winter oilseed rape (2012). The whole area was split into application cells of 6 × 10 m and abundance of all weed species was evaluated manually in each cell. Four different herbicide treatments were tested. Standard whole-field herbicide application (blanket spraying) was treatment 1. Treatments 2, 3 and 4 comprised SSWM using different thresholds for post-emergent herbicide application. SSWM resulted in savings of post-emergent herbicides ranging from 71.9% to 100%, depending on the application threshold. Differences in winter rape yield among treatments were generally small and statistically insignificant (P = 0.989). Although some minor changes in weed abundances were observable, the experiment showed that none of the site-specific herbicide treatments caused a significant (α = 0.05) increase of weed species abundance compared to the standard treatment.Keywords
Economic Thresholds, Patch Spraying, Weed Control, Yield Loss, Brassica napus L., Triticum aestivum L.Full Text
References
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