Joe from Lacenter, Wa writes
Propiconazole 14.3 Fungicide will target listed diseases but we do not offer information/advice on this for type injection of trees with products as it is for experienced, commercial applicators. This type of beetle can be prevented but not chemically treated once infested. Keep in mind that most trees infested with bark beetles are already suffering from other conditions such as disease, age, competition, etc. Please view this great article by the Nevada Division of Forestry on the Fir Engraver Beetle.
Answer last updated on: 03/04/2022
