We normally receive questions on elm leaf beetles in July when the second-generation feeds on elm leaves. However, this year, we are seeing the insect as a nuisance pest that has invaded houses.
Though adult beetles that invade homes can be a severe nuisance, they do not feed or damage food or furnishings. Preventive steps to prevent and invasion in the fall include screening and caulking around window moldings and under siding. Spot treatment of entry areas on the outside of the house with a chemical such as cyfluthrin or permethrin should help. However, that only applies in the fall when the insects seek to enter the house. Beetles that are already inside can be controlled with regular vacuuming. Empty the bag or container after each cleaning to prevent the insects from crawling back out. (Ward Upham)
Though adult beetles that invade homes can be a severe nuisance, they do not feed or damage food or furnishings. Preventive steps to prevent and invasion in the fall include screening and caulking around window moldings and under siding. Spot treatment of entry areas on the outside of the house with a chemical such as cyfluthrin or permethrin should help. However, that only applies in the fall when the insects seek to enter the house. Beetles that are already inside can be controlled with regular vacuuming. Empty the bag or container after each cleaning to prevent the insects from crawling back out. (Ward Upham)
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