Prevents insect damage to trees and shrubs. Insecticide dissolves in water and moves down through the soil, where it is absorbed by the roots. Once absorbed, it moves up through the tree or shrub, providing year-long protection even into new growth. Application rate: Trees: 1 oz per 1" of distance around trunk per gallon of water. Shrubs: 3 oz per foot of height per gallon of water. Formulation: Imidacloprid.