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Research Report

This page is used to publish recent reports that relate to bracken control issues.

National Bracken Chemical Control Trials

Date: 29 January 2021

Title: NBCT 2012-20 Final Summary Report

Author: Roy Brown


Location Plan - Schedules  - Tables

National Bracken Chemical Control Trials - Site Dumfries 4

Date: 16 November 2020

Title: Testing alternative Herbicides for Bracken Control - Initial Set-Up Report

Author: Roy Brown



Date: 25 October 2021

Title: Testing alternative Herbicides for Bracken Control - Interim Report (Year 1)

Author: Roy Brown


National Bracken Chemical Control Trials - Reprise Reports - Author: 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

Bracken Canopy Penetration Trials

Date: 15 September 2021

Title: An evaluation of the Penetration of Ground Applied Asulox through a Dense (90% plus cover) Bracken Canopy

Author: Jeff Old, Roy Brown

Description: 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.


Asulam Drift Trials

Date: 19 September 2021

Title: To Evaluate the Drift from Aerial Application of Asulox

Author: Jeff Old, Roy Brown

Description: 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.


Asulam and Wet Flush Moorland Plants

Date: 16 February 2022

Title: The effect of asulam herbicide on wet flush moorland plant communities on the North York Moors National Park

Authors: Roy Brown, S Holloway

Description: 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 ...."