Nekoliko herbicida čije je delovanje i do dve godine i u veoma malim količinama.
Moguće je uneti ih preko komposta stajnjaka ili malč materijala.

* Picloram - sold as Tordon, Access, Surmount, Grazon, and Pathway.
* Clopyralid - sold as Curtail, Confront, Clopyr AG, Lontrel, Stinger, Millennium Ultra, Millenium Ultra Plus, Reclaim, Redeem, Transline.
* Aminopyralid - sold as Milestone, Forefront, Pharaoh, Banish.

Suzbijaju širokolisne korova pa samim tim i većinu povrtarskih kultura.
više o tome na :
http://www.the-compost-gardener.com/picloram.html