What precautions do we need to be aware of where herbicides are applied?

To minimise spread, if you cannot control access, fencing and warning signs should be used to prohibit unauthorized access into the affected area.
During application of herbicide, please keep persons and pets out of the area. The herbicides used are not harmful to mammals if used correctly, however unnecessary exposure should be avoided.
Do not allow the above ground Knotweed vegetation to be trampled on, cut down or damaged. Damage to the above ground part of the plant makes the treatment using herbicide less effective. In certain circumstances it can also lead to further spread.
You should also notify all relevant parties with access to the infestation that the cutting down/pulling out of any Japanese Knotweed is not permitted during a treatment programme as to do so would severely hinder the control of the Japanese Knotweed, or worst-case scenario cause new infestations to occur.
A 1m boundary should be left around the infestation to avoid contaminating surrounding soil.
It is imperative that no Japanese Knotweed is permitted to be disturbed, broken / pulled during an in-situ control programme as this will delay control timescales and potentially increase control costs in the end