Picture Gallery Three Below are some common insects and disease that might bother your trees and shrubs.   PICTURE 3-1 Vole damage.   PICTURE 3-2 Girdling roots.   PICTURE 3-3 Armillaria rhizomorphs. PICTURE 3-4 Lecanium Scale.   PICTURE 3-5 Inonotus sp..   PICTURE 3-6 Spider Mites. PICTURE 3-7 Armillaria mushrooms.   PICTURE 3-8 Hemlock Woolly Adelgid.   PICTURE 3-9 Bark beetles (NOT Ambrosia Beetles!).