Elm Leaf Beetle
- yellowish in color with the appearance of black stripes in later stages
- 3/16 - 1/4 inch long
- yellow with black stripes/markings
- black stripe along the edge of each wing cover
- oval, soft-bodied insects
- outdoors: live in elm trees on leaves and under bark and leaf litter at the base of the tree; woodpiles
- indoors: garages; behind curtains, between books, under carpets, in wall voids, ventilators or other protected places
- elm leaves
- enter buildings in large numbers to overwinter or occasionally to escape hot, dry weather
- larvae skeletonize leaves and defoliate elm trees
- adults chew holes in leaves
- Use a vacuum to remove beetles indoors.
- Do not attempt to kill these beetles in wall voids with insecticides unless they will be removed. Dead insects attract other pests. Instead, wait until summer to take exclusionary control measures.
- Find and seal all exterior cracks in June or July and repair screens and door sweeps to prevent entry.
- Keep elm trees healthy; target pesticide treatments at larvae and adult beetles on host trees.