Bonide® 2761 Sucker Punch Knock Out Sprouts, Ready To Use, 1 PintA water based paraffin wax emulsion of Ethyl 1 Napthaleneacetate Sprout Inhibitor PGR, a plant growth regulator that stops suckers sprouting from roots and purning cuts of ornamentals trees and other woody plants. Lasts 6 months. Spray on RTU trigger and brush on, brush top applicators included. Size: 1 Pt Ready to use Stops plants from sprouting or suckering where they are pruned Kills back unwanted sprouts and suckers without harming main plant