Before using, bruise the shoots with a rake to ensure effective penetration Roundup Stump Killer, Doff Weedout Extra Tough Weedkiller or Westland Resolva Pro Xtra Tough Concentrate) can be applied in late summer when growth is strong. Tough weedkillers containing glyphosate (e.g.On vacant soil, where there are no herbaceous perennials, bulbs or crops, you can use SBM Job Done Path Weedkiller (ready to use only) or Weedol Pathclear products containing glyphosate/diflufenican to inhibit new shoots.Infestations of horsetail can be weakened with weedkiller. If horsetail appears in lawns, it can be kept in check by mowing regularly. However, removing shoots as soon as they appear above the ground can reduce infestation if carried out over a number of years. Shallow, occasional weeding is not effective and can make the problem worse, as the plant can regrow from any small pieces left behind. Although rhizomes growing near the surface can be forked out, deeper roots will require a lot of excavation. If chemical controls are used, they should be used only in a minimal and highly targeted manner. The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control.
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