A number of county forestry partners in northwest Wisconsin are trapping for emerald ash borer (EAB) on their properties this year with technical assistance from the DNR forest health team.

Potential captures of EAB may give officials a better understanding of the invasive beetle’s distribution in the region that can support forest management planning and public awareness. Partners conducting trapping include Bayfield, Douglas, Rusk, Sawyer counties and the Barron County Conservation District.

Landowners and property managers can report signs and symptoms of EAB activity to Northwest regional forest health specialist Paul Cigan at 715-416-4920. Visit the DNR's emerald ash borer page to learn more about the invasive insect and signs/symptoms of infestation.

Tent caterpillar numbers to stay low

Forest tent caterpillar egg surveys conducted in northern counties indicate hardwood defoliation from the native insect will remain low in 2019, sustaining a 16-year trend. The last tent caterpillar outbreak affected northern Wisconsin from 1999–2002.

Cooler and wetter than average spring weather may indirectly reduce caterpillar populations by enhancing the activity of pathogenic fungi. Residents are encouraged to report any possible defoliation to forest health specialist Paul Cigan at 715-416-4920. To learn more about this insect, visit the DNR forest tent caterpillar webpage.