ODNR said there are no reports of the elm zigzag sawfly causing the death of elm trees. The insects grow to one-half-inch long and look similar to caterpillars, and are light green in color.

Although the insect causes defoliation of elm trees, most defoliated trees can recover from a defoliation event," the agriculture department said in a news release.

Elm seed bugs (arocatus melanocephalus) are relatively new to Idaho. They first established in 2009 near Boise but have since been found throughout the state wherever elm trees grow.

Dutch elm disease is caused by a fungus that can be spread by a bark beetle or through two trees that have interconnected roots. Beetles reared in infected trees emerge from the diseased wood ...

Beetles reared in infected trees emerge from the diseased wood carrying spores, ... Elm trees made up 40 percent of Winona's trees in the 1960s, including this canopy over Broadway Street.

Although the insect causes defoliation of elm trees, most defoliated trees can recover from a defoliation event," the agriculture department said in a news release.

The 36 trees planted last week at Boutwells Landing senior living community in Oak Park Heights have a big job: To help revitalize the state’s elm population. The American elm ...