arboricide

Substance intended to kill trees and shrubs.
Found on http://sis.nlm.nih.gov/enviro/iupacglossary/glossarya.html

arboricide

arboricide 1. The wanton destruction of trees. 2. A chemical that kills trees.
Found on http://www.wordinfo.info/words/index/info/view_unit/176/

arboricide

killing of trees
Found on http://phrontistery.info/a.html
No exact match found