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Originally Posted by PhilaGardener
They were terrible here in PA a few years ago, particularly when the invaded the house by the hundreds. Numbers have subsided a lot but I guess they are here to stay.
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I think you're right. They're here to stay, but it's likely they'll come into some more acceptable level of balance with the ecosystems here.
Native Predators May Be Having a Larger Impact than Expected on Invasive Stink Bug
The BMSB's biggest parasitoid wasp predator in Asia has been found spontaneously in quite a few states at this point, too:
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It was quite a surprise when in 2014, a survey of resident egg parasitoids of the BMSB by Don Weber, (ARS-Beltsville Area Research Center), using sentinel brown marmoraed stink bug egg masses, revealed that T. japonicus was present in the wild at one of his study sites in Beltsville, MD. Since then, several T. japonicus wasp clusters have been found in Maryland and Virginia over the past two years. More recently, it appears that T. japonicus was also found in Vancouver, Washington.
To add to these finds, we have also captured T. japonicus in the Hudson Valley of New York over the past 2 weeks, using sentinel brown marmoraed stink bug egg masses. This work was fully supported by program funds directly from the NY State apple growers.
https://blogs.cornell.edu/jentsch/20...new-york-state
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If T. japonicus is in MD, VA, and NY, they're probably here in PA, too. Penn State may just not have gotten around to looking for them.