By Alex Feltmeyer, forest health specialist, Plover, alexandra.feltmeyer@wisconsin.gov, 715-340-3810
Pine wood nematode (PWN) was recently found to be infecting Scotch pine in Waushara County. Symptoms of pine wood nematode include rapid crown browning (within 3 months) in late summer, rapid drying of wood and presence of blue-stain fungi in the wood.
Symptomatic trees dying from pine wood nematode. Photo by Alex Feltmeyer.
By Bill McNee, forest health specialist, Bill.McNee@wisconsin.gov, 920-360-0942 and Andrea Diss-Torrance, invasive forest insects program coordinator, Andrea.DissTorrance@wisconsin.gov, 608-264-9247
Hunters should avoid placing tree stands in or near ash trees, especially in the southern half of Wisconsin, the Mississippi River region and in Door County. Many ash trees in these areas are dead or dying from attack by emerald ash borer (EAB), becoming weaker and more likely to break even with little to no added weight. Continue reading “Dead and dying ash are hunting hazard”
By Mary Bartkowiak, invasive plants specialist, Rhinelander, Mary.Bartkowiak@wisconsin.gov, 715-493-0920
There’s so much to enjoy about fall and so many activities to take in before the blanket of snow changes our landscape. Something to keep in mind is that the introduction of invasive plants can play a role in changing the landscape, too.
Continue reading “Slow the spread by sole and tread – revisited!”
By Bill McNee, DNR forest health specialist, Oshkosh, Bill.McNee@wisconsin.gov, 920-360-0942
Fall is an excellent time to look for and dispose of gypsy moth egg masses that were laid in the summer. Since egg masses usually don’t hatch until April, information gained from fall/winter surveys can be used to avoid gypsy moth damage before the following spring and summer.
Spraying egg masses with oil kills the eggs inside, preventing hundreds of caterpillars from hatching next spring.
By Kyoko Scanlon, forest pathologist, Fitchburg, Kyoko.Scanlon@wisconsin.gov, 608-275-3275
The Wisconsin Pesticide Applicator Training (PAT) program with University of Wisconsin Extension is offering a training session for Forestry (Category 2.0) in January 2020. The training is a one-day indoor session to review the materials in the training manual. A certification exam will be administered at the end of the day by Wisconsin Department of Agriculture, Trade and Consumer Protection.
This training will be held January 24, 2020 in Stevens Point at the Portage County Courthouse Annex Building (1462 Strongs Avenue).
Pre-registration is required and the fee is $30. For more information, visit the PAT website. When you are ready to register, visit the PAT program online ordering page.
By Mike Hillstrom, forest health specialist, Fitchburg, Michael.Hillstrom@wisconsin.gov, 608-513-7690
Considered one of the most destructive diseases of conifers in the northern hemisphere, HRD is very difficult to eradicate once established. Infestation of a conifer stand may significantly impact stand management, making early detection of the disease extremely important.
HRD fruit body with new white growth on infested stump. Credit: DNR Forest Health.
By Mike Hillstrom, forest health specialist, Fitchburg, Michael.Hillstrom@wisconsin.gov, 608-513-7690
The most commonly reported forest health issue in recent weeks has been unhealthy looking oaks. Symptoms ranging from rapid mortality to gradual decline to superficial have been observed on all species of oak this summer.
White and bur oaks are being impacted by a variety of health issues in late summer 2019, including fungal leaf infections and bur oak blight. Symptoms are most severe in the lower half of this tree’s canopy. Credit: DNR Forest Health.
By Andrea Diss-Torrance, invasive forest insects program coordinator, Andrea.DissTorrance@wisconsin.gov, 608-516-2223
Most people know that using locally-sourced firewood helps prevent the spread of invasive pests and diseases. What may be less well known are the processes for finding local sources of firewood or learning where and how you can collect it yourself. During Firewood Awareness Month, we want to share what options are out there so you can take steps to protect the places you love.
Infested firewood can carry invasive insects and diseases to new places. Buy or gather firewood where you will use it or buy firewood that has been certified as heat-treated and free of pests and diseases. Credit: dontmovefirewood.org.
Continue reading “It’s Firewood Awareness Month: do you know what your options are?”
By Bill McNee, forest health specialist, Oshkosh, bill.mcnee@wisconsin.gov, 920-360-0942
Site visits and aerial surveys conducted in parts of Wisconsin during July and August have found that tree decline and mortality were common in numerous lowland forest stands.
Heavy tree mortality in a Manitowoc County lowland site where standing water was present on July 31. Note the surviving trees on higher ground and in adjacent stand. Credit: Bill McNee.
Continue reading “Continued decline & mortality on lowland sites”
Have you noticed a fast-growing vine with fragrant flowers on your trees and shrubs this summer? The plant began to flower a few weeks ago, drawing attention and concern from residents around the state.
Wild cucumber blooms in mid- to late summer with yellowish-white fragrant flowers. Credit: Susan Mahr.
Continue reading “Native vine thrives with wet Wisconsin summer”
