The elm seed bug hasn’t lived in La Plata County for long, but it didn’t struggle to gain a foothold in the region. It is harmless to humans, but it is an invasive species that preys on the seeds of ...

Siberian elm (Ulmus pumila) is an invasive tree native to northeastern Asia. It was introduced into the U.S. in the 1860s for ornamental purposes. It invades roadsides, ditch banks, pastures, waste ...

Nursery officials are at work in Bismarck injecting insecticide into nearly 2,000 elm trees to help manage the spread of European elm scale. The insect feeds on elm trees by sucking sap from branches ...