Japanese Knotweed / Hogweed
Japanese Knotweed is one of the biggest and most troublesome environmental nuisances facing developers and managers of land. SJ Services are licensed to treat these infestations and over the past few years have successfully treated many sites around the South East. The stem injection system we use is the most effective solution in the eradication of Japanese Knotweed. As the treatment is specific to the target species it can be completed in all weather conditions and near water. Both Knotweed and Hogweed are notifiable to the council. We have the equipment to safely work on steep inclines; including safety harnesses, a 12ft-spraying lance and the equipment to burn any cut knotweed on site.
• Japanese Knotweed is a species listed under Schedule 9 Part II of the Wildlife and Countryside Act 1981 (WCA 1981). Under this schedule it is an offence to plant or cause Japanese Knotweed to grow in the wild
• It is not an offence to have it growing on your land, but it is if operations such as mowing, strimming, digging and cultivation are carried out as this can cause Japanese Knotweed to spread
• It is the owner occupier’s duty to ensure there is no encroachment of Japanese Knotweed onto neighbouring land – this may constitute a private nuisance
• Japanese Knotweed and any soil contaminated with the rhizomes are classified as controlled waste and should be burnt on site. Any removal of plant material from site must be accompanied by appropriate waste transfer documentation
• Plant material can only be disposed of at licensed facilities, or by incineration under licence
• As part of the survey we will survey a site to identify and document the extent of infestation on the site. A number of alternative approaches will be recommended for the control of Japanese knotweed on the site, each recommendation will be site specific taking into account location, level of infestation, extent of control required and the environmental impact of the control method.
• We would also repeat the measures 2-3 times a year as it can take up to 4 years to eradicate it
• We would monitor the effectiveness of the chemical control over time
• The two types of control currently available are:
Cultural - Involves manual removal of the Japanese knotweed and its rootstock.
Chemical - The use of selective herbicides