Pesticide Posted on 13th December 201513th May 2021 by ThePD (The Project Definition) A Pesticide is any substance or mixture of substances that is used to kill harmful insects, small animals, wild plants, and other unwanted organisms. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Substance and tagged health. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.