New pest chomps through Edmonton's elm canopy

Edmonton’s renowned elm forest is under attack from a tiny insect that’s coating branches and leaves with a sticky film as it slowly chomps its way across the city.
European elm scale attaches itself to the bark and feeds on sap, leading to yellow, prematurely falling foliage, branch dieback and, in some cases, death, Mike Jenkins, a senior city biological sciences technologist, said Thursday.
He’s concerned that what was once an isolated pest is spreading through mature neighb