Boxelder Bugs (Leptocoris trivittatus or Boisea trivittatus) are a common bug named for the tree they love, the Boxelder maple (Acer negundo). They feed on the Boxelder tree as well as plum, ash and cherry trees.
They are a nuisance, and can be a little frightening when swarmed all over your door but even more so when the temperatures cool and they’re looking to find a place to live... like inside your home.
Boxelder bug adults and nymphs. Photo credit: William M. Ciesla, Forest Health Management International, Bugwood.org
They typically enjoy the south side of your house. Boxelder bugs like smooth light-colored surfaces just like your siding. Other hibernating places include behind the loose bark of tree gaps, in window sills, loose siding and anywhere else they can find that they can crawl into.
Control: A contact insecticide like Zeps 'Bug Max' will work effectively; as well as Bonide's Beetle Killer that hooks up to your hose. Always make sure you test spray a small area to make sure the product you are spraying does not stain your stucco or siding.
If you’re looking for kinder/gentler controls try these tips:
- Employ a building maintenance plan. Seal up cracks with a good silicone sealer. Reattach any loose siding; replace bent window sills and screens. Make sure exterior doors close tightly and inspect all weather stripping. This will stop them actually penetrating your home.
- At Gertens we also carry several earth friendly options - one being 'Eco Smart' organic insect killer. It kills and repels over 100 different insects and bugs including Boxelder beetle. Although it’s labeled non-staining as with all products, spray an inconspicuous test area of siding and wait two hours to test it out first. If you don't notice any changes in siding appearance you can go ahead and spray. Another product that is eco-friendly would be Bonide Eight.
The experts at Gertens are always available to answer your questions!
