Avoid losing transplanted trees and costly call backs with CoreTect. New CoreTect tablets contain the world's #1 tree and shrub insecticide plus fertilizer, so they protect and nourish. Used during planting or on established plants, CoreTect provides extended insect control through its controlled release technology. Once inside, CoreTect's systemic action makes plants stronger and more resistant to environmental stressors like heat, drought, and poor soil conditions.