Invasive insects like the mountain pine beetle, emerald ash borer and Asian long-horned beetle continue to be a deadly menace to the nation's forests but the overall number of trees being killed by these pests is on the decline.

WOBURN, MA - Arbotjet, a company focused on developing "effective and environmentally sound formulations and equipment" for combating the emerald ash borer, Asian long-horned beetle and other tree-killing insects, claims its products helped save some 350,000 trees in the United States last year.