Garden staff are finding more scale insects and aphids than in past years. A major infestation of lecanium scale was recently found on a large planting of bald cypress at the Garden. The population of ...

The emerald ash borer has been found in all of Iowa's 99 counties. (Photo by Dr. James E. Zablotny/USDA) The emerald ash borer, a non-native, wood boring insect that affects ash trees, has been ...

DILWORTH — After an ill-fated arrival last spring, the emerald ash borer is burrowing down for winter on the Minnesota side of the river. The invasive pest, native to Asia, was first discovered in ...

Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in Menlo Park discuss a tree-related topic from general care and planting tips to how ...

Based on the photo we have sent, what is wrong with our oak tree? Is there something that we should be doing to ensure its health? — Mitchell and Anna Jones, Libertyville From your photo, I can see ...

Yep, those straight rows or columns of holes in the trunks and limbs of your tree are compliments of the pretty sapsucker woodpecker. These pretty birds are seeking the sugar that has been ...