Lesa from Spokane, Wa writes
The active ingredient Imidacloprid in Fertilome Tree and Shrub Systemic Insect Drench has not been shown to be effective in controlling this type of borer. Monthly treatments with something like Permethrin SFR can help control adults and small larvae. There are great articles here and here that might also help
Answer last updated on: 04/03/2017
