Trunk Wrapping May 4, 2018 305 × 229 Elm Leaf Beetle Control Tape sticky side out trapping the Beetle larvae as they head to the ground to pupate. Some larvae don’t bother with the trunk, they go with gravity thereby avoiding trunk banding traps. Non chemical trunk banding with heavy duty tape inside out. The Elm Leaf Beetle larvae are trapped as they head down the tree. Timing of treatment is crucial, larvae will start going to ground in Melbourne around December.