Knot is a liquid product based on the extract of Equisetum arvense L., declared as a basic substance according to the approval of the Implementing Regulation (EU) No. 462/2014 of the European Commission.

Knot is not used mainly for phytosanitary purposes but it is useful for plant health as reflected in the SANCO/12386/2013 report following the European Pharmacopoeia specifications.