Elm Leaf Beetle
Adults: The adult beetle is approximately 1/4 in.
long (6-8 mm) and dull olive-green in color. There is a
longitudinal black stripe along the outside edge of each
wing cover and an elongate spot at the base of each wing
cover near the center of the body.
In the home: Elm leaf beetle adults create the
greatest nuisance, invading homes in late summer and
early fall. They may become active inside the house if
their hiding places become warm any time throughout the
winter. In the spring, beetles attempt to return
outdoors, and often gather in large numbers around
windows. At this time a vacuum cleaner or broom can be
used to remove the beetles. As additional beetles leave
their hibernating quarters, vacuuming must be repeated.
The spring emergence period (early-mid-April) lasts from
several days to a month. After this period the beetles
will be gone from the house.
Chlorpyrifos (ready to use) may be used to treat
hibernating masses of beetles located in attics and wall
voids.
The severity of infestations can be greatly reduced
by caulking cracks in exterior and interior house walls
and by keeping screens (including screens on attic vents)
in good repair.
For a complete listing of suggested control option
for all home, yard and garden insect pests contact your
local Extension Service, found under local government in
the phone book.
Read and follow instructions on the pesticide label.
Heed all warnings. Check with your physician if you have
any concerns regarding your personal health risk.