Forest & Shade Tree – Insect & Disease Conditions for Maine May 19, 2025

Forest & Shade Tree – Insect & Disease Conditions for Maine May 19, 2025

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Maine Forest Service

Forest & Shade Tree – Insect & Disease Conditions for Maine

May 19, 2025


In This Edition:


Arbor Week

May brings much to celebrate and observe. Foremost in our minds this week are the celebration of Arbor Week in Maine (Yes, we get a whole week, while the rest of the nation settles for a day!) and the national observance of Emerald Ash Borer Awareness Week.

With more than 17 million acres of forest land, we sometimes take the forests in Maine for granted. If forests are underappreciated, the trees in our towns and cities often are not at the top of our minds until they become a problem. Arbor Week is an opportunity to celebrate the benefits we experience from our public trees and the bountiful forests. It is a time to make or renew a commitment to the stewardship of community trees and to honor and appreciate those who care for them.

National Emerald Ash Borer Awareness Week is always observed the week before Memorial Day weekend, the big kickoff to camping (and firewood travel) season across the nation. It is timed to remind people that moving firewood long distances can have dire consequences. In many cases, moving firewood is illegal. Emerald ash borer is one of many reasons you should leave firewood at home. Others that can move readily on firewood include oak wilt, brown spruce longhorned beetle, Asian longhorned beetle, beech leaf-mining weevil, browntail moth and more.

During this National Emerald Ash Borer Awareness Week, we ask that you camp smart, leave your firewood at home, and join us in the effort to educate others about the reasons (more than 23.5 billion trees and all that relies on them) why leaving your firewood at home is so important. We invite you to visit our firewood page for more information.


Personnel Updates

Earlier this year, veteran forest inventory unit Entomology Technician Jordan Downs accepted a transfer to our insect and disease unit’s Southern Region Entomology Technician position. Jordan has jumped right into the work, and his familiarity with the region, projects, and staff has made his transition seamless.

We also welcomed Cindy Bellavance as the new Entomology Technician out of the Central Region. Cindy joins us shortly after completing her degree in Zoology at the University of Maine. She has experience working with balsam woolly adelgid and eDNA for rare insect species.

The alphabet of tasks Jordan and Cindy have covered in two months is impressive and a testament to their hard work and the dedication of FHM staff in orienting new employees. Beech leaf disease (BLD), brown spruce longhorned beetle (BSLB), emerald ash borer (EAB), European larch canker (ELC) and hemlock woolly adelgid (HWA) are among the pests and pathogens they’ve done field work on. They have also both been studying to sit for pesticide licensing exams, a requirement for some of the surveys they’ll engage in soon.

Olivia Tracy worked with us as a Student Intern over the winter months of 2025. She completed her degree requirements for a B.S. in Biology at the University of Maine in December 2024. She split her time between doing winter field surveys for us and working on spruce budworm population monitoring at the L2 Lab at the University of Maine.

We’re hiring! We are currently looking to fill a vacant Conservation Aide position in far northern Maine in our forest inventory unit. This is a 35-week position, but in recent years, we have been able to keep Conservation Aide staff on year-round due to the need to meet program deadlines.

If you know someone who loves spending time outdoors and is looking to build their credentials in a natural resources field, this position might be the perfect fit for them! FIA staff work 4–10-hour days Monday through Thursday, and can work overtime on Friday if an additional plot can be completed. They are assigned a truck and start work when they get in the truck in the morning. Most work hours are spent outside collecting data, with a significant portion also in the seat of a truck. Conservation Aides work alongside an Entomology Technician for almost all their field work and train for certification to cruise plots and meet the rigorous federal standards for quality.

You can find this and all DACF open positions on our department website.


Insects

Browntail Moth (Euproctis chrysorrhoea)

As in past years, we are continuing our network of browntail monitoring sites throughout the affected areas of Maine. Our staff conduct weekly visits to each site to document caterpillar growth and to keep an eye out for disease outbreaks. Our monitoring sites in 2025 are in Belfast, Brewer, Bridgton, Dover-Foxcroft, Ellsworth, Harpswell, Newport, Old Town, Turner, and Unity. Updates are provided as appropriate. You can read the first season updates under “News” on our browntail moth page. To maintain a record of activity in this publication series, an overview of the season follows.

Browntail moth caterpillars have been active for a few weeks now after re-emerging from their winter webs; the first observation of which occurred on April 24. This is a bit delayed compared to the last few years, when re-emergence occurred closer to the middle of April.

Caterpillars on a leaf

Image: Newly re-emerged caterpillars in Harpswell, ME; note the two orange dots towards the tail end, characteristic of browntail moth caterpillars.

During rainy conditions in early May, we observed browntail caterpillars huddled under the cover of their webs. We also noticed the creation of a gauzy silk added to the winter web as the caterpillars grow and become more active. This silk will add to the size of the winter web over the coming months, offering some protection for the caterpillars.

The current weather pattern is beneficial to the pathogens that control browntail populations. If it persists further into May and June, we might see a decline in browntail moth numbers in the areas with elevated populations (portions of Androscoggin, Cumberland, Franklin, Hancock, and Oxford Counties).

Host tree and caterpillar development are progressing and we are now seeing the variability in development that is typical this time of year. Last week, the largest caterpillars were at our monitoring site in Brewer, with a body length of about 0.58 inches (14.89 mm), where caterpillars at other sites were roughly 20% smaller. Microclimates at the sites may help drive this discrepancy.

Some caterpillars have broken white stripes down their backs, indicating they have developed to at least the fourth instar. As they continue to mature, they will spend less time together and more time wandering. This is often when people first realize they have a browntail moth infestation. It is also a sign that the best time to treat trees with browntail moth will soon end. Generally, insecticide treatments should take effect before the end of May to be most effective. Later treatments do little to mitigate damage to trees or the buildup of caterpillar hairs in the environment. Read more in our FAQs.

In areas with a history of infestation or with an active infestation, please plan aheadto avoid exposure to hairs:

  • Avoid areas with BTM caterpillars,
  • Wear proper personal protective equipment to protect your skin including long sleeves, hat, gloves, closed-toed shoes, etc.,
  • Plan yardwork on wet days to mitigate hairs becoming airborne from mowing, leaf blowing or raking leaves,
  • Take showers and change clothes after outdoor activities.

Emerald Ash Borer (Agrilus planipennis)

Emerald ash borer (EAB) continues to spread in southern Maine, with the confirmations of infestations in two new counties in early 2025.

In late March of 2025, an arborist reported an extensive EAB infestation on Mount Desert Island in the town of Bar Harbor, signifying the first known EAB infestation in Hancock County. Given the isolated nature of this incident and little evidence that EAB is present in the surrounding towns at this time, the decision was made to place Mount Desert Island under quarantine until more information is available. Currently, no regulated ash items or hardwood firewood is permitted to leave Mount Desert Island.

In late April of 2025, an arborist reported removing a single ash tree infested with EAB in Belfast, also signifying the first known EAB infestation in Waldo County. As Waldo County is currently within the boundaries of Maine’s EAB quarantine zone, no regulatory changes were required in response to this detection. Follow-up survey did locate several more infested trees in the immediate vicinity, but did not indicate the presence of EAB in neighboring towns.

EAB is now known in the following counties of Maine: Androscoggin, Aroostook, Cumberland, Hancock, Kennebec, Oxford, Penobscot, Sagadahoc, Waldo, and York.

Presently, there are no known infestations in Franklin, Knox, Lincoln, Piscataquis, Somerset, and Washington counties. However, EAB infestations are known in towns immediately adjacent to Franklin, Lincoln, and Somerset counties.

Emerald ash borer monitoring season will be in full-swing shortly and monitoring tools like purple prism traps will be going up across Maine this month. To stay up to date with which towns and counties have active EAB infestations, as well as the extents of Maine’s EAB quarantine zone, please consult our Emerald Ash Borer Dashboard Map. If you think you have found emerald ash borer in a NEW town or county, please submit photos and report it using our Maine Forest Service – Tree Ailment Form.

Hemlock Woolly Adelgid (Adelges tsugae)

The winter mortality rates of hemlock woolly adelgid (HWA) have a huge effect on hemlock health where this invasive insect is established. However, winter mortality is not as simple as, “when it dips below this temperature, this many adelgid will die.” Cold snaps in the late winter/early spring, when adelgids are losing their cold tolerance, will kill more adelgids than similar temperatures in the middle of the winter. Sudden, extreme drops in temperature will kill more adelgids than a slow cooling. Finally, prolonged cold spells will cause greater mortality than briefer cold snaps.

This past winter we had some prolonged periods of relatively cold weather in much of the HWA range. We sampled HWA in early spring and found that overwintering mortality ranged between 45.2% and 58.4%, averaging 51.4%. Adelgid populations were still fairly low and spotty last summer, and hemlocks continued to regain health and vigor. However, we expect HWA populations to rise this year.

Graph showing average winter mortality of hemlock woolly adelgid in Maine from 2013-2024. Mortality was just over 50% this winter.

It can be difficult at this time of year to tell whether the HWA you see on your trees are alive or dead under the white waxy wool. If you are curious about how many adelgids on your trees are living, you can use the “smear test.” Find a twig with several white ovisacs (the white waxy wool covering the adelgid) and run a finger along the underside of the twig. If it comes away covered with many green/brown smears, you know that many of the adelgids were alive. If your finger comes away with nothing but bits of wax and perhaps tiny, dried crumbs of black, you know they are all dead. If you have just one or two green/brown smears, you know that a few were still living. This can give you a rough idea of winter mortality on your specific trees.

Spruce Budworm (Choristoneura fumiferana)

As much of our readership is likely aware by now, elevated spruce budworm populations continue to be of concern in northern Maine. We have updated our on-line resources to improve access to information about spruce budworm. Following the new easy to remember URL www.maine.gov/sbw you can find an overview of spruce budworm in Maine including:

Later this spring, management activities will include an aerial spraying program to reduce building SBW populations across approximately 240,000 acres of susceptible spruce-fir forest, scheduled from late May through mid-June. Treatments are being coordinated by landowner members of the Maine Budworm Response Coalition following the Early Intervention Strategy (EIS) pioneered in adjacent spruce budworm outbreak areas in New Brunswick and Atlantic Canada. Details on the program are found on the Maine Spruce Budworm Task Force website sprucebudwormmaine.org, under “What is Spruce Budworm Doing in 2025?”

Winter Moth (Operophtera brumata)

On May 1, we performed our most recent release of the biocontrol agent for winter moth, a parasitoid fly called Cyzenis albicans. The flies were released from an emergence cage that was buried in the ground last October to help overwinter the 2,242 pupae from last year’s collection efforts. The release site, The Nature Conservancy’s (TNC) wooded Basin Preserve in Phippsburg, was chosen because that area had the most severe defoliation in the state. TNC staff were instrumental in helping us monitor for fly emergence in April.

5 flies on a piece of wood

Image: Newly emerged Cyzenis albicans mating in the emergence cage prior to their release, Phippsburg ME.

Adult flies will feed on nectar from a variety of flowers, including red maple, while the females undergo a maturation phase. Female flies can sense host volatile chemicals released from damaged oak, maple, and other host leaves (leaf damage possibly caused by caterpillar feeding). Once the female fly’s eggs have matured, she will lay them on the damaged leaves, and some eggs will be consumed by winter moth caterpillars. After the caterpillars mature and drop off the tree into the soil, they will spin a cocoon that looks like a small dirt clod that is about the size of a Tic Tac mint. It is then that the fly eggs hatch inside the caterpillars and the larvae begin to consume the caterpillars from the inside. Eventually, the fly larvae will pupate inside the cocoons spun by the caterpillars and emerge from the soil the following May.

Later this month, we will perform our annual collection of caterpillars from our previous C. albicans release sites. This year our collection efforts will be bolstered by staff from other northeastern states through a mobilization of the Forest Health Working Team of the Northeast Forest Fire Protection Compact to collect enough parasitized winter moth caterpillars to serve as biocontrol to aid a growing winter moth infestation in Rhode Island. Flies reared from any parasitized caterpillars collected will serve as the source for next year’s biocontrol releases. In addition, these collections will show where the parasitoid has been established successfully and what proportion of the winter moth population in those areas is being parasitized.


Diseases and Environmental Issues

Beech Leaf Disease (Litylenchus crenatae mccannii)

Beech leaf disease (BLD) was found in 119 towns in 2024 and has been detected in 12 new towns already in 2025 (based on winter survey finds of banded leaves typical of BLD infection). Currently, BLD is found in all Maine Counties except Franklin County. The Maine Forest Service (MFS) expects to find BLD in many more new towns in 2025 as the disease seems to be expanding at a rapid rate. Current belief is that BLD naturally spreads primarily via rain/wind events in autumn, the time BLD nematodes are migrating from the leaves to the buds for the overwintering stage of their lifecycle. For current information and BLD distribution, visit the MFS BLD Website.

Two photos of leaves with dark areas between veins

Image: (left) The banding symptom associated with BLD is easily noticed in winter on senesced leaves of beech; (right) Clear banding as seen in summer, resulting from overwintering BLD nematodes feeding in the bud.

This summer, MFS will begin year two of a beech leaf disease treatment trial involving the injection of Thiabenzadole, the active ingredient in Arbotect 20-S. Injections have been shown to effectively reduce nematode populations in beech trees impacted by BLD and therefore lessen symptoms. The image below shows the sites where Arbotect 20-S macroinjections were trialed in 2024. The treatment protects beech trees for two years. As an additional goal of the trial, we aim to preserve beech bark disease-resistance genes in Maine’s beech population. Resistance to beech bark disease (a long-present and very common disease of Maine’s beeches) is characterized by smooth bark without evidence of cankers and associated callus tissue, seen as bumps, cracks and pock marks on beech bark. These resistant smooth-barked beech trees are the targets for preservation via the Arbotect 20-S treatments. If you know of groups of beech bark disease-resistant beech (at least three) in easily accessible forest areas that will not be harvested, existing away from the areas shown on the map below, please email aaron.bergdahl@maine.gov or call him at (207) 287-3008.

A map of Maine; a tree with buckets at its base

Images: (left)The approximate locations of tree groups included in the Arbotect 20-S macroinjection trial; (right) A beech tree being treated to manage BLD symptoms.

European Larch Canker (Lachnellula willkommii)

Winter 2025 survey for the federally regulated disease of larch species (Larix spp.), European larch canker (ELC), has been both successful and informative. Unlike in 2024, the frozen conditions this year allowed prolonged, easy and safe access to wetland and bog areas where eastern larch can be found in abundance, enabling surveyors to closely examine trees for presence of the canker. Over 100 sites were assessed and mapped this year, establishing many superior sites to revisit in future years of survey. Further, two new locations of ELC, Vanceboro (Washington County) and Jefferson (Lincoln County), were confirmed at the border of the quarantine boundary that was expanded in 2023. Finding ELC in these new locations, quite far from the coastal areas thought to represent key conditions for ELC disease development, shifts our understanding of ELC and its potential distribution and spread since its initial confirmation in Maine in 1981 (Lubec, Washington County).

ELC eradication efforts at the Brunswick Country Club (BCC) continued in 2025. This location was confirmed as being infested with ELC in 2007, prompting action by MFS and federal partners to address this satellite area of ELC occurrence (in 2023 quarantine boundaries were expanded to include the Brunswick ELC area).

In early April of 2025, all larch trees on the golf course were assessed for disease severity based on number and location of cankers. Data on general tree health and crown conditions were also collected. During the survey, 29 cankers were removed via pruning by MFS staff. Of the 53 remaining larch trees on the course, 10 trees were flagged for removal and 12 were identified for pruning with the use of a lift (cankers were too high in the crown for pruning by MFS personnel). Management recommendations toward eradication of ELC at the location were developed and will be provided to the BCC groundskeeping staff, who can integrate these into their overall management of the course’s trees. Roughly 50 trees have been removed by the BCC in the past 5 years, highlighting the progress of this cooperative effort.

A stick with an arrow pointing at white spots; a map of Maine showing quarantine areas along the coast and Downeast.

Images: (left) A branch with a European larch canker (yellow arrow pointing to spore-producing structures, close-up of structures inset lower left); (right) A map of the current quarantine areas in Maine and New Brunswick, Canada. New ELC finds near the quarantine boundaries are indicated by red squares circled in yellow.

Phomopsis Gall of Red Oak (Phomopsis sp.)

During the later winter months, after the oaks have finally dropped most of their persisting leaves, people tend to notice ball-like galls on the branches of some oaks. This is a somewhat common and native tree disease of Maine’s oaks called Phomopsis gall of oak. Scientific information on Phomopsis gall of oak is far from complete. Infective spores, for example, have never been observed in nature, leaving this important part of the Phomopsis lifecycle unclear. Unusual cell growth caused by the infection leads to development of pea-sized growths on branches, often going unnoticed until they reach the size of a golf-ball or fist – they can eventually grow to the size of a basketball. As galls grow, their weight makes branches more susceptible to breakage. Galls may be found in lower numbers or in the hundreds and the reason for this remains unclear. There is speculation that only some trees are susceptible to infection based on individual tree genetics (it is common to see a see a severely infected tree next to trees without a single gall). The tree health impact of Phomopsis galls depends on gall location, with main-stem galls representing more serious impacts than galls on smaller-diameter twigs. The presence of Phomopsis gall in a yard tree is not necessarily cause for removal – many trees live for decades with non-severe disease. However, when managing forest areas including oak trees infected by Phomopsis gall, it is recommended that infected trees be prioritized for removal. According to current knowledge, wood from trees with galls is of normal quality and the branches with galls (and the galls themselves) do not require special treatment and can be left to decay on the forest floor.

A tree with many galls; two photos of a gall on a branch

Images: (left) Numerous galls of variable sizes on a red oak tree; (top right) A close-up view of several galls on fine oak branches; (bottom right) A cross-section of the firm, woody galls of Phomopsis gall of oak.


Other Insect and Disease Laboratory Activities

Insights from the light trap network

Each summer, the MFS coordinates a network of light traps to monitor moth flight activity. These trends help inform both insect management strategies and forest health outreach. Moth data collected in 2024 has now been thoroughly sorted, compiled, and compared to previous years, which reveal some interesting patterns.

Forest tent caterpillar (Malacosoma disstria) was the most commonly trapped moth in 2024, with over 1,100 specimens captured. Although numbers declined slightly from 2023, their abundance remained high, following the pattern of minor outbreaks peaking roughly every 10 years. Interestingly, the capture data also showed a notable shift to more northern latitudes when compared to prior outbreaks. This will be no surprise to residents of Aroostook County, who have become quite familiar with this native caterpillar after experiencing three consecutive years of aspen defoliation.

A graph showing forest tent caterpillar catches from 2002-2024

Browntail moth (Euproctis chrysorrhoea) captures increased modestly in 2024 to a total of 823 moths. However, when compared to the peak of the outbreak in 2020 of around 5,000 moths, the broader trend suggests a regional decline in the statewide population. While capture rates can be highly variable across sites and years, the initial increase and subsequent decrease in browntail pressure is supported by MFS aerial survey data, which shows very few acres defoliated or damaged by browntail throughout 2024.

A chart showing browntail moth captures in Maine

Eastern spruce budworm (Choristoneura fumiferana) is starting to show signs of a comeback in Maine. Data from the Spruce Budworm Monitoring Network, Maine Forest Service aerial surveys, and second-instar larval sampling all suggest that populations are beginning to rise again. Looking back at historical data from light traps, it’s clear how dominant spruce budworm was during the last major outbreak in the 1970s and 1980s; at times making up the bulk of all moths caught. Although budworm light trap counts have remained relatively stable in recent decades, this historical perspective highlights how dramatically populations can shift. Continued monitoring is essential as we track early signals of change in Maine’s northern forests.

A chart showing total moth catches in light traps from 1970-2024

Invasive Plant Spotlight

EDRR Invasive Species Alert – Be on the lookout for destructive invasive plant, Japanese stiltgrass (Microstegium vimineum)

Biologists from the Maine Department of Agriculture, Conservation and Forestry (DACF) are asking for the public’s help locating and reducing the spread of severely invasive Japanese stiltgrass (Microstegium vimineum). Stiltgrass was first detected in 2020 in Sagadahoc County and is only known from a handful of sites in Maine. Therefore, stiltgrass is considered an Early Detection and Rapid Response (EDRR) species and is currently known to be present in Sagadahoc and York Counties. EDRR management efforts are showing significant reductions in the size and extent of stiltgrass infestations annually, but due to a prolific seed bed and dispersal of new seed, new populations appear every year. Locating new populations of stiltgrass is high-priority and urgent to work towards the eradication of this species from Maine.

Stiltgrass is an annual grass that takes over the forest floor and reduces biodiversity and regeneration of native flora. Once established, stiltgrass has a high potential to inhibit seed germination of neighboring plants by releasing allelopathic chemicals into the soil. In addition, stiltgrass thatch can build up and make it difficult for native trees, shrubs, and wildflowers to regenerate. The thatch also raises fire risk. Infestations grow rapidly as each plant can produce up to a thousand seeds that can be spread by moving water, deer, contaminated soil, dirty boots, or dirty equipment. New populations are most likely to be found in moist forest sites, particularly in areas with bare exposed soil. Many of the populations in Maine are along trails, roadways, old skid trails, new culvert installations, and wetlands where seeds are being deposited by moving water.

Stiltgrass starts out growing slowly, with rapid growth occurring in mid- to late summer. Therefore, it is most visible and best to identify in July and August. If you think you have found stiltgrass on your property or on public land, please report it by sending an email with photos and location to invasives.mnap@maine.gov or map the location with photos in the online mapping tool iMapInvasives. iMapInvasives also allows you to see other mapped locations, explore invasive species near you, and set up email alerts for your area or species of concern. In addition, please use great care to not spread plant propagules and seed. This can be achieved by hand-pulling stiltgrass before it sets seed (typically early/mid-September); using boot brushes and cleaning equipment when leaving the site; and properly disposing of plant material. Newly detected stiltgrass should be removed to prevent it from damaging Maine’s treasured forests and wetlands. DACF will offer support and guidance to affected landowners. If you would like more information or believe you have found Japanese stiltgrass, please visit the Maine Natural Areas Program website under the Invasive Species tab to view our invasive plant field guide for identification tips and to sign-up for a free iMapInvasives account.

Key traits to identify stiltgrass:

  • Leaves are alternate along the stem, 2 – 4″ long and 1/2″ wide, pointed at both ends
  • Stripe of reflective hairs along the leaf midrib
  • Leaf edges and surfaces feel smooth to the touch
  • Trails along the ground, branching from nodes where it produces “stilts” (roots)
  • Shallow-rooted and easy to pull up
  • Flowers and sets seed late in the season (September – October); one to three seed spikes at the top of the plant that resemble crabgrass
  • Stems often develop a reddish tint late in the season
The forest; A hand holding a stem of grass;

Images: (left) Stiltgrass can form large, dense infestations in forests (Georgetown, ME); (right) Stiltgrass leaves alternate along the stem and have a silvery midrib.


Climate Summary – May 2025

In 2024, Maine and 16 other states had the warmest annual temperatures on record, with the average temperature for the year (January – December 2024) being 4.9°F higher than normal. Northern Maine is experiencing more notable warming compared to Southern and Central Maine. In Caribou and Millinocket, 2024 was the warmest year since records began in 1939 and 1903 respectively. It was the second warmest year for Bangor with the warmest year occurring in 2010.

Maine’s frost season (November 2024 – March 2025) was warmer and milder than normal with temperatures averaging 24.9°F, roughly 3.9°F above the 1901 – 2000 climate baseline. On average, there was less snowfall statewide during the 2024 – 2025 winter season. Areas in the Midcoast and Washington County received significantly less snowfall – up to 45 inches less than normal in some areas.

Two maps showing Maine snowfall and temperature

Image: (Left) The departure in statewide snowfall totals from normal (1991 – 2020 averages). Overall, Maine had less than normal snowfall totals for the 2024 – 2025 winter season. Note a “0” indicates snowfall totals were not different from the 1991 – 2020 average. Source: Northeast Regional Climate Center; (right) Almost no areas in Maine currently in drought in early May, except for southern counties where there are moderate and abnormally dry conditions. Source: NDMC, NOAA, USDA.

In the last 12 months (May 2024 – April 2025), the state average precipitation was approximately 43 inches, which is about normal. However, areas of northern Somerset County, and Midcoast and Downeast towns have experienced 25 – 50% less than normal precipitation. Maine had very dry conditions beginning in late September, with the entire state categorized as abnormally dry or moderate drought conditions lasting until December. In late April 2025, many wildfires appeared across the state, aided by strong winds and dry conditions. Drought conditions are not expected to continue through May.


This Month in Conditions Report History: May 12, 2005

“Sudden Oak Death: We still have no evidence that this disease is presently established in Maine nor any knowledge that it can even survive in this climate. We do, however, know that we have some native species which are capable of becoming infected by the sudden oak death pathogen. So it is prudent that we continue to monitor for this disease, and we are planning to conduct forest stand and nursery perimeter surveys again this summer. Therefore, some of you will probably be hearing from us in early July when we commence this activity.”


Calendar

June 17 and June 18, 2025, 1:00 PM to 4:00 PM, Jumping Worms Virtual Workshop

The Maine Department of Agriculture, Conservation and Forestry is hosting a free, two-day virtual workshop on invasive jumping worms (Amynthas spp.) and their impacts on soil nutrients, ecosystems and forests, and the methods being tested by researchers and citizen scientists to answer the question on everyone’s minds: what can we do to effectively manage jumping worms? Speakers include Brittany Schappach – Entomologist with the Maine Forest Service, Josef Görres – Associate Professor with University of Vermont, Erin Buchholz – Plant Health Specialist with Minnesota Landscape Arboretum, Annise Dobson – Associate Research Scientist with Yale University, Justin Richardson –Professor with University of Virgina, Tricia Bethke – Forest Pest Outreach Coordinator in Illinois, Erin Cameron – Professor with Saint Mary’s University in Canada, and Vera Krischik – Associate Professor and Extension Specialist with University of Minnesota.

Join the virtual session to engage and connect with speakers in dedicated Q&A sessions and interact with attendees from different states and all knowledge backgrounds. Attendees are eligible for up to 6 CFE credits.

See agenda (PDF) for more details. Registration required.

Register Now


Conditions Report No. 1, 2025

Online

Department of Agriculture Conservation & Forestry, Maine Forest Service – Forest Health and Monitoring

Contributors: Aaron Bergdahl, Amy Emery, Chad Hammer, Gabe LeMay, Allison Kanoti, Mike Parisio, Brittany Schappach, Thomas Schmeelk, Colleen Teerling, and Andy Whitman