By Michael Hillstrom, Forest Health Specialist, Fitchburg
Michael.Hillstrom@wisconsin.gov
Oak decline at Big Foot Beach State Park caused by flooding, drought, spongy moth defoliation, twolined chestnut borer and Armillaria. / Photo Credit: Michael Hillstrom, Wisconsin DNR
Bur and white oaks, most of them more than 100 years old, have experienced rapid mortality (within one to two years) over the past four years in southern Wisconsin and neighboring states. Research into the cause is ongoing, but the evidence so far suggests it’s an oak decline.
Oak declines are not caused by a single issue, but rather by the stacking of multiple health issues. Drought, flooding, storm damage, age, twolined chestnut borer, Armillaria and other root pathogens, and spongy moth and oak leafroller defoliation all play a role in the damage.
Continue reading “Oak Decline Continues In Southern Wisconsin”
Join us for a two-part workshop on the value and uses of bare root trees and how to use gravel beds to hold and maintain bare root stock before it is planted. Part one will be delivered via Zoom on Friday, Sept. 20. Part two will be an in-person field day visit to an operating gravel bed. You will select one of the six locations around the state during registration. ISA CEUs will be available for both parts.
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