Articles by PJ Liesch

As of late 2018, 27 counties across Wisconsin have confirmed reports of the brown marmorated stink bug and a handful of others have suspected sightings.More
Wisconsinites generally expect mosquitoes to be "bad" from late spring through the summer, but for the pesky sanguivores to fade away as autumn approaches. However, September 2018 definitely bucked the trend.More
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The latest non-native pest to arrive in Wisconsin is the tiny purple carrot-seed moth, and its impacts are not yet fully known.More
Observant visitors to parks and gardens around Wisconsin over the summer might have noticed a surprising creature hovering among the flowers — the hummingbird-like sphinx moth.More
Chinch bugs aren't much to write home about, but played a key role in Wisconsin history.More
Wisconsinites encountering spiders they might find threatening often wonder if they've found either a brown recluse or black widow spider.More
Since the earliest days of humankind, people have excelled at exploring and expanding their presence to nearly every spot on the map. With all of this wanderlust, humans have been equally adept at taking other species with them on their travels — often with unintended consequences.More
When it comes to these blood-sucking pests and other creepy-crawlies, each year can be a different experience, with weather patterns and other factors playing important roles in the behaviors of insects and other arthropods like spiders and millipedes, as well as other invertebrates.More
Bird mites would top a list of regularly misunderstood pests.More
I've had a morbid fascination with watching the progression of the emerald ash borer in the Midwest for over a decade.More