The DNR Forest Health team recently completed the 2019 Forest Health Annual Report summarizing impacts from pests, diseases and weather on the health of Wisconsin’s forests. Highlights from 2019 include:
• Dramatically increased decline and mortality from EAB in southern WI
• New county and township detections of oak wilt
• Record-breaking precipitation and major storm damage
• Summary of state nursery studies
To read the report, follow this link.
By Marguerite Rapp, forest health communications specialist, email@example.com, Andrea Diss Torrance, invasive insects program coordinator, firstname.lastname@example.org, and Tim Allen, DATCP forest pest program coordinator and nursery inspector, email@example.com, 715-891-8158
This time of year, many Wisconsinites warm up with firewood, whether that’s in a wood stove for the home or a bonfire with family and friends. While firewood is one of the most sustainable heat sources available, the forests that produce it are threatened when firewood infested by invasive species is moved long distances. Fortunately, we can reduce this threat together through responsible use, movement and sale of firewood and wood products.
Continue reading “Fighting invasives together through responsible firewood practices”
By Bill McNee, forest health specialist, Oshkosh, firstname.lastname@example.org, 920-360-0942
The cold winter months are a great time to think about emerald ash borer and whether ash trees in your yard are suitable for treatment. The pest is currently the most damaging threat to trees in Wisconsin, killing more than 99 percent of the ash trees it infests.
Woodpecker flecking is an early sign of EAB infestation when it appears in the tops of trees (left). As the infestation progresses, flecking continues down the trunk and into lower parts of the crown (right).
Continue reading “Check your trees for EAB and plan for spring”
By Paul Cigan, forest health specialist, Hayward, email@example.com, 715-416-4920
With the new year upon us, healthy lifestyle habits are sure to be on many people’s minds as they plan for changes in diet and exercise. The new year is also the perfect opportunity to make healthier choices for trees! Winter is the ideal time for tree pruning while avoiding harmful, disease-carrying pests such as the tiny beetles that carry oak wilt from one tree wound to another.
Pruning during winter is less likely to invite unwanted, disease-carrying pests like the beetles that carry oak wilt from one tree to another. Credit: sasapanchenko.
Continue reading “Protect your trees from disease by pruning when they have no leaves”
Forest health annual report now available for 2019.
The Forest Health Annual Report summarizes notable impacts for that year of pests, diseases and weather on the health of Wisconsin’s forests. The report is a collaborative product created by DNR forest health specialists from around the state. It outlines the damage and spread of both native and invasive pests and diseases during that year and puts these into context of observations from previous years. Management programs and their results are also described. Highlights from the 2019 annual report include:
- Dramatically increased decline and mortality from emerald ash borer in southern WI
- New county and township detections of oak wilt
- Precipitation record and major storm damage
- Summary of state nursery studies on Diplodia sapinea, galls on jack pine seedlings, and testing new fumigants to replace methyl bromide
This year’s annual report is available on the DNR forest health homepage. Previous annual reports, including historical reports dating back to 1951, are archived and available upon request. Contact your local forest health specialist if you’d like digital copies of any archived annual reports.
Forest health staff recently produced a map that highlights a gradient of damage from southeastern to northwestern Wisconsin, which roughly corresponds to the length of time EAB has been present in these parts of the state. Whatever the level of damage, homeowners and landowners should consider treating healthy ash, including trees that have responded well to previous treatments, or removing declining, untreated ash before they become hazardous and even more costly to remove.
County-level assessment of damage to ash population by emerald ash borer, 2019.
Continue reading “New map illustrates damage from EAB”
Most people are familiar with the impacts of invasive plants to natural areas, but did you know that invasive plants can be hazardous to human health? Did you also know there is a new app available to learn about tick activity near you and help researchers by recording your own tick encounters? Continue reading “Invasive plants, ticks and you”
By Alex Feltmeyer, forest health specialist, Plover, firstname.lastname@example.org, 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.
Continue reading “Pine wood nematode in Waushara County”
The emerald ash borer (EAB) will kill nearly all of Wisconsin’s ash trees that are not protected by insecticides. If you have healthy ash trees in your yard, you have an important decision to make: protect your trees with insecticides or have them removed. Either way, time is of the essence. If you delay in treating your ash trees, the treatment may be less effective. And if you wait to remove them, removal costs will be greater and safety hazards will only get worse.
Credit: Joseph O’Brien, USDA Forest Service, Bugwood.org
What makes infested trees so dangerous?
The structural integrity, or strength, of ash branches and tree trunks begins to decline as soon as the tree becomes infested and the wood begins to dry. Lower moisture content increases the risk of branch and trunk breakage, and the timing of breakage is usually unpredictable. Infested trees may also have total trunk failure soon after death, further increasing the chance of dangerous impacts to people and property.
Continue reading “Are you planning to treat your ash trees? If not, stay safe and save money by removing them ASAP!”
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”