Stockpile and treat

Stockpile & Treat is appropriate where timeframe excludes the use of in situ herbicide treatment, and where space is available for stockpile treatment. It involves the physical excavation either by us or under our expert supervision all infested soils that contain viable rhizome. These are then stockpiled in a non-critical area on site, preferably no higher than 500mm thick. Knotweed growth in the stockpile is actively encouraged, ready for subsequent herbicide treatment over a full growing season.

Procedures are put in place to ensure that the knotweed infested soil is not allowed to spread to otherwise clean areas of the site by careful management of the haulage route.

This method requires a significant amount of space on site for the stockpile, especially if laid to the recommended 500mm thickness. The thickness can be increased but this will extend the required herbicide Treatment Programme to more than one growing season.

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