Orthene Turf, Tree & Ornimental WSP Insecticide's powerful active ingredient Acephate 75%, is commonly used to protect trees, turf and ornamentals from a variety of insect pests. Orthene TTO Water Soluble Packets (WSP) works effectively in two complimentary ways: first, controlling insects on contact, then penetrating plant tissue for local systemic control. This convenient water soluble packet (WSP) formulation reduces handling, measuring and package-disposal hassles.