By Bill McNee, DNR Forest Health Specialist, Oshkosh, Bill.Mcnee@wisconsin.gov or 920-360-0942
Typically, gypsy moth egg masses hatch in April as temperatures warm. Now is a great time to do an egg mass inspection to look for unknown infestations and treat or remove any masses within reach. Each mass can result in 500 to 1,000 leaf-eating caterpillars.
Egg masses are tan-colored lumps and vary from about the size of a nickel to a quarter. They can be found on many outdoor surfaces such as tree trunks, the undersides of branches, buildings, rocks, fences, retaining walls, firewood piles and picnic tables.

Gypsy moth egg masses on the underside of a maple branch.

Recordings of these webinars are available. These recordings expand on each topic, filling in some details about the industry.
Tree City, Tree Campus and Tree Line USA program participants: please review the Arbor Day Foundation’s following expectations regarding the 2021 program recognition standards.
The Wisconsin Urban Forestry Council has announced awards honoring those dedicated to protecting, preserving and increasing the number of trees that line city streets, fill community parks and beautify neighborhoods throughout Wisconsin. The Wisconsin Urban Forestry Council advises the Wisconsin Department of Natural Resources (DNR) Division of Forestry on the management of urban and community forest resources.