How are weeds cleared?
Physical and chemical (pesticide) weed control methods will be used where they are practical and cost effective. Innovative methods of weed control will be tested whenever possible to determine their suitability for highway use and with the aim of undertaking an integrated weed treatment regime.
What Pesticides are Used?
All pesticides shall be approved by the Pesticide Safety Directorate or Health and Safety Executive and used strictly in accordance with the advice given by the manufacturer and the Ministry of Agriculture, Fisheries and Food, and the requirements of the current edition of The Control of Pesticides Regulations.
Pesticides based on or containing any of the following will not be used under any circumstances:
- Substances from the triazine group
- Any other nationally banned substance
The total, non-residual herbicide glyphosate, will be used to eliminate weeds on filter drains. The herbicide will be applied to the weed growth only.
Total herbicides used as part of footway construction or highway maintenance works shall be applied as a preventative measure. The situations in which particular herbiscides will be used is as follows:
- prior to application of thin surfacings, slurry seal, micro asphalt or surface dressing - Glyphosate and Sulfosulfron used.
- as part of footway construction or reconstruction work - Glyphosate and Sulfosulfron, where weeds are present.
The use of herbicides on soft areas is limited to the following
- Glyphosate around the base of young trees or saplings for the control of Japanese Knotweed, and Giant hogweed
- Selective herbicides for the spot treatment of harmful weeds