Raul writes
Onslaught is a pyrethroid insecticide, so it is not a systemic that you can apply as a root drench to infested plants. You can apply Onslaught as a topical spray on ornamental plants to treat for aphids. Be sure that you are getting thorough coverage on all sides of the leaves, especially underneath where insects like to hide. For a systemic treatment, we would recommend an Imidacloprid product such as Fertilome Tree and Shrub Systemic Insect Drench.
Answer last updated on: 05/14/2018
