Big Bedbug Home Invasion Season Is Coming


Bedbug season is here and it could be bad.

The Penn State Master Gardeners report that entomologist Greg Krawczyk expects “a very robust population of brown marbled bugs this fall.”

And that means there will be a lot of bedbugs invading our homes through whatever cracks and crevices they can find as soon as the temperatures start to drop.

“As in previous seasons, over the past few weeks we have started to observe a high number of adult marble bugs and nymphs congregating in monitoring traps placed in and around commercial orchards,” Krawcyzk reported.

“Traps placed on or under trees at the edge of the woods as well as traps placed in the first row of orchards, which rarely collected bedbugs for most of this season, now collect significantly more nymphs (bedbugs) and adults. “

Jim Fredericks, Chief Entomologist of the National Pest Management Association, agreed: “Warmer than usual spring and summer temperatures can allow stink bug populations to complete more than one population cycle per year, often resulting in more stink bug sightings in and around houses. In areas of Pennsylvania where temperatures were particularly warm from May to August, residents may encounter greater numbers of bedbugs in the fall.

Pennsylvania is one of 11 “red zone” states where serious agricultural and nuisance problems have been reported, according to Rachael Baihn, writer for, a lawn care and pest control service in Pennsylvania and 100 other U.S. markets.

“They’re invading more states across the country and Pennsylvania is a hot spot,” she said. “This tiny insect has cost farmers millions in crop failures. Although they prefer to infest fruit and vegetable plants, they move quickly indoors when cooler weather sets in.

“They also tend to roam in large groups, so if you’ve seen one of these marble bugs inside your home, you’ll definitely find more.”

Fredericks explained: “Brown bugs are found throughout the Commonwealth and can become a serious agricultural pest, especially in apples and stone fruits. There are many different species of stink bugs, but only one – the stink bug. marbled brown, Halyomorpha halys – tends to be an indoor pest of homes and other buildings.

“As the weather cools in September and October, adult marbled bugs seek refuge in cracks and crevices in buildings, crawling behind siding for shelter in wall voids, often on the south sides of the building. Often hundreds (or thousands) can congregate in the same area, looking for a warm place to spend the winter months.

“On warm winter days, some insects will become active and find their way indoors.”

As temperatures start to cool and the days get shorter, now is the time to take preventative measures to protect a home from infestations.

Sealing cracks and crevices can help, and pest control professionals can provide services to help reduce the number of bedbugs that can invade, Fredericks noted.

Baihn said, “The last thing you want to do is pick one up. When disturbed, the insects emit their scent, which contains a pheromone that attracts more stinky insects. Entomologists suggest sucking them in. a vacuum cleaner, this way you do not run over them.

“On the positive side, the brown marbled bug will not bite, sting, or harm people. It may take you a few days or weeks to get the odor out of your home.

Bedbugs did not appear in the United States until the late 1990s in Allentown, Pennsylvania. They are believed to have come in shipping crates from China or Japan. They are most prevalent in the eastern part of America.

An invader from East Asia, the marbled bug was first found in North America in 1998, in Allentown.

It has since spread to all but three of the 48 continental United States and several Canadian provinces.

Contact Marcus Schneck at [email protected].


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