Research Reports
| For the research carried out at Lowna, please refer to: Bracken Control Group - Lowna Research |
| Title | Description | Date | |
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To Evaluate the Drift from Aerial Applications of Asulox in North Yorkshire (Final Report) Jeff Old & Professor Roy Brown |
The objective of this study was to provide additional data and evidence for determining effective and safe buffer zone, currently set at 90m, when applying Asulox from the air. The trial was conducted on 16th August 2023 at Lowna on the North York Moors. | 21 December 2023 | |
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National Bracken Control Chemical Trials - Dumfries Phase 4, Year 2 Report Professor Roy Brown (R&D Applied Biology) |
The report provides further information on the efficacy and ecological safety of products containing asulam and amidosulfuron when used to control bracken. A comparison between the effects of different application rates applied early and late within the bracken season was undertaken, with year 1 and year 2 results concluding amidosulfuron generally is not a viable treatment for bracken. The results of the first year indicated asulam when applied late in the season and amidosulfuron applied early in the season, could be considered effective primary treatments. And a confirmation in year 2 with further amidosulfuron treatments ineffective after the first year. |
27 April 2023 | |
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ADAS Report: Comparative assessment of risks of two bracken herbicides Sarah Cook, Steve Ellis, Susan Kelly, Marie Brown |
The report provides a comparative assessment of the two herbicides and indicates the strengths and weaknesses against a range of higher and lower plants (bryophytes, pteridophytes) and soil mesofauna. An indication of the strength of the evidence for each species is given, including susceptibility at specific growth stages. Gaps in knowledge were identified and suggestions made for further experimental work. |
1 December 2022 | |
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How long do bracken control treatments remain effective? Ilgın Akpınar, Josu G Alday |
Pteridium aquilinum is a problematic, perennial, invasive species worldwide that poses serious problems in the British uplands. However, there is a lack of knowledge on long-term success in terms of weed control and land improvement. We assessed the effects of six P. aquilinum-control treatments at two acid-grassland sites in the Scottish Borders (Sourhope 1 & 2). |
3 November 2022 | |
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National Bracken Chemical Control Trials (2022 Summary Report) Roy Brown
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Identification of features of amidosulfuron that had not be presented clearly previously including how the uptake of the herbicide by bracken occurs and the implications for control strategies. | 24 October 2022 | |
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Jeff Old, Roy Brown |
Two further sets of trials data were collected to confirm the drift pattern from an aerial boom with Pencil Jet nozzles used to apply Asulam to bracken to help in making informed decisions relating to the revision of the required buffer zone against waterbodies. This additional data combined with the 2021 data adds more support to the reduction of the current buffer zone from 90m. |
24 October 2022 | |
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Roy Brown, S Holloway |
A series of transects were established across sprayed and unsprayed wet flushes to determine the effects, if any, of direct asulam spray and drift on the plant communities. The original report was prepared in 1995, but it has been reviewed to allow it to contribute to the current discussions about the use of Asulam. See the conclusions on p27 of the report, "The effect of asulam on wet flush plant communities was found to be minimal with a significant number of sensitive species including P. aquilinum remaining. Sphagnums and rushes had not been reduced in diversity or density in the sprayed flush ...." |
16 February 2022 | |
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National Bracken Chemical Control Trials - Reprise Reports Roy Brown |
Fawdon Farm 2020 + 2021 Reprise Report - 25 October 2021 Sandscale 2021 Reprise Report - 14 November 2021 Dumfries3 Final Report years 4-5 - 10 December 2021 Challacombe 2019 Final Reprise Report - 10 December 2021 |
October- December 2021 | |
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To Evaluate the Drift from Aerial Application of Asulox Jeff Old, Roy Brown |
Further data are provided to evaluate the drift pattern from Pencil Jet nozzles and to allow informed decisions to be made about the required buffer zone against surface water bodies during aerial application of Asulam products for bracken control. |
19 September 2021 | |
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Jeff Old, Roy Brown |
Generic information is provided on the role of the bracken canopy in intercepting spray volume applied at approved rates, using standard back pack spraying equipment. |
15 September 2021 | |
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Roy Brown |
29 January 2021 | ||
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Testing alternative Herbicides for Bracken Control - Initial Set-Up Roy Brown |
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16 November 2020 | |