The latest info on plant pests, pathogens, and weeds.

New ALB Materials!

Our program has recently acquired some new items to educate the public about Asian Longhorned Beetle!  We now have these ALB erasers.  They have a fun ALB image and message and will serve as a reminder to check your trees for signs of beetle damage throughout the summer.  They’re also perfect for summer camps or school, or any art project (I’ve tried them. They work very well).


We’re also bringing back our ALB bookmarks with fun antennae-shaped tops, great for schools and libraries, especially with summer reading programs happening now.

All these materials, as well as any others that you have seen on this blog, can be ordered free of charge here

Hey, That’s Not ALB!

It’s that time of year again! Every spring, when outside temperatures start to heat up, we get reports from people concerned that they’ve see the invasive Asian Longhorned Beetle (ALB). Luckily, ALB won’t emerge from the trees until July. If you’re seeing big black beetles with long, long antennae in May and early June, they are almost certainly the native look-alikes known as Whitespotted Pine Sawyers.

The whitespotted sawyer (Monochamus scutellatus) is a native beetle that attacks diseased and damaged pine trees. It emerges from trees earlier in the season than Asian longhorned beetles (“ALB”), which is not expected to be seen in Massachusetts until July. Both beetles are black with white spots and long, black-and-white banded antennae. But sawyers are not as shiny as ALB, they have smaller and duller white markings, and they have a distinct, white, half-circle marking at the top center of their wing covers. Use this image to compare:

Asian Longhorned Beetle vs. Whitespotted Pine Sawyer

If you think you’ve seen an Asian longhorned beetle, or you aren’t sure what you’ve seen, it’s always better to get a photo or capture the specimen and then report it.

Meet the BeetleBot!

What looks like an Asian Longhorned Beetle, but doesn’t threaten our trees and natural resources?  The BeetleBot!

This terrifying machination resembles the invasive insect currently located in central Massachusetts. The real beetle targets hardwood trees, especially maples, but this robotic replica’s only goal is to educate and entertain. It was featured at the It’s A Bug’s World expo, held this year in Newport, RI. Tree surveyors from USDA and DCR, who inspect host trees in the Worcester area for signs of damage, showcased the BeetleBot to raise awareness of the invasive insect, to the delight of families that attended the show. Over 500 visitors came to see the BeetleBot and learn about ALB, see the live insects on display, and talk to experts in the field of entomology.

Guests admire the BeetleBot on display

Now that the show has ended, BeetleBot has moved to its permanent home at the EcoTarium in Worcester, MA, where it is being used in public education programs. It might also make an appearance at the Ecotarium’s Earth Day festivities.

If you wish to learn more about Asian Longhorned Beetle, our blog here is a good starting point, as is our website

Stopping Forest Pests at the Source

Are you a Massachusetts landscaper that imports/distributes stone and or tile materials for use in construction or landscaping? If so, we’d like to hear from you!

Stone and other hardscape materials shipped in wood packaging, such as crates and pallets, can serve as pathways through which invasive pests like emerald ash borer (EAB) and the newly discovered spotted lanternfly make their way into our state. Unchecked, these pests pose a threat to our natural resources, and have the potential to do millions of dollars in damages to our economy.

The Forest Pest Outreach Project, part of the Massachusetts Department of Agricultural Resources, is asking for your assistance in evaluating how to better equip those that work in the landscaping and hardscaping industries with techniques to help stop invasive pests at their point of entry and/or prevent their potential spread. If you are a local business owner or a member of the landscaping industry that deals directly with stone importing/distribution (especially Pennsylvania bluestone), we would like to schedule a time with you to visit your business and discuss the nature of stone/tile imports and distribution as it pertains to accidental pest introductions.

While participation is voluntary, your assistance will further safeguard our state against the threat of invasive species and help create resources to prevent future introductions.

To schedule a meeting or get any additional information, contact Javier Marin, the Forest Pest Outreach Coordinator, at, or call 617-626-1738.

can secretly carry this!

Sometimes this…

Don’t Move Firewood! Protecting Campgrounds and our Natural Resources

Though it’s cold outside now, the spring camping season is rapidly approaching! While many campers like to bring their own firewood to campsites, the invasive wood-boring insects Asian Longhorned Beetle and Emerald Ash Borer make frequent use of firewood to transport themselves to new infestation sites. Worcester has already lost 36,000 trees to date due to the ALB, so the economic and environmental risk these invasive pests pose to the rest of New England’s hardwood forests is immense.


In order to help spread awareness of these pests and the risk they pose, we offer a variety of free outreach materials, including ID cards, pamphlets, and laminated posters suitable for display outdoors. We also offer “Don’t Move Firewood” material that encourages campers to buy their own firewood at campsites. You can order your free materials at here

Campers should be aware of the risks involved in moving firewood, even to nearby towns. It is a good idea to be aware of where at each campground you can purchase firewood.

If you want to update your campground’s website with information pertaining to invasive forest, here is some suggested wording:
Bringing firewood from home when you go camping could put your favorite campsite in danger. Tree-killing insects and diseases can hitchhike in firewood and use it to spread to new areas. Instead of bringing firewood with you when you go camping, buy firewood from a location close to where you camp. For more information, see:

It is the responsibility of all Massachusetts citizens and visitors to make sure we are preserving our natural resources, and being aware of these invasive insects and how to combat their spread is part of that.


Calling All 5th Grade Arborists and Artists!

The 2016 contest’s winning entry, with the theme Trees Grow With Us and For Us

Are you a 5th grade teacher or a 5th grade student with a passion for art or nature?  Then we have the perfect opportunity for you!  The Department of Conservation and Recreation has announced its 2017 Arbor Day Poster Contest, a chance to win cool prizes for your school by showing off your artistic talent and knowledge of the diverse trees of Massachusetts!

This year’s theme is “Trees are Terrific…from Berkshires to Bay!” and is open to all fifth grade students in Massachusetts, including homeschoolers. If your students are interested in entering, we encourage them to research Massachusetts ecosystems, the trees that thrive there, their specific characteristics, and how they impact your daily lives.  Tree diversity is important for a successful ecosystem, especially in the face of invasive forest pests such as Asian Longhorned Beetle (ALB) ( and Emerald Ash Borer (

This is a great opportunity to promote your school and your message about biodiversity and forestry here in the Bay State. One of your students may even win prizes, including art supplies or a tree on your school property!

We would be especially interested in posters that discuss ALB or other forest pests and the trees they target as preferred hosts; many native trees iconic to the Massachusetts landscape are targets of invasive pests.  We are not involved in judging posters, but posters that discuss invasive pests, even if they are not finalists, may be displayed here to promote our message of pest awareness!  We’ll even display winning entries here on our blog!

The deadline for submission is March 15th 2017, with winners announced in April. Only one poster may be submitted per school.  Please be sure to follow all instructions when submitting a poster.  A full list of rules can be found here.

Good luck, and have fun researching the wide diversity of trees here in Massachusetts!

Winter Moth Survey Update 2016

Milan Zubrik, Forest Research Institute Slovakia

Winter Moth Adult

The winter moth flight came and went this fall, and numbers were so low, you might not have noticed them at all…

The winter moth (Operophtera brumata) is an invasive species first discovered in Massachusetts in the 1990s. Winter moth caterpillars are highly efficient tree defoliators, often stripping the leaves of oaks, maples and other hardwood trees down to lacy skeletons. Adult flight typically begins in November and will continue through late December or early January.  During this time, female winter moths can lay up to 150 eggs each, which will hatch into hungry caterpillars in spring.

Whereas our annual winter moth survey typically gets over a thousand responses each year, we only received 75 responses between November 2016 and January 2017. The low number of responses is strongly linked to the fact that winter moth adult populations were down significantly this year.  But this decrease in activity was not totally unexpected.  Last year, winter moth populations fell due to some unusual weather that encouraged the caterpillars to hatch before tree buds opened, leaving them without a source of food. Additionally, the parasitic fly Cyzenis albicans has been establishing at release sites throughout eastern Massachusetts and is also contributing to reductions in winter moth populations.

Winter Moth Caterpillar

However, that doesn’t mean that winter moth is going away any time soon.  Even if winter moth populations are low in spring of 2017, they can still rebound.  For homeowners who want to treat their trees for winter moths please see this winter moth fact sheet for more information about dealing with this pest.


Photo credits: Milan Zubrik, Forest Research Institute Slovakia,

2016 Winter Moth Survey

It’s that time of year again: winter moths and other related species have started to show up at porch lights across the state. The winter moth (Operophtera brumata) is an invasive species first discovered in Massachusetts in the 1990s. Winter moth caterpillars are highly efficient tree defoliators, often stripping the leaves of oaks, maples and other hardwood trees down to lacy skeletons.

In mid-to-late fall, at a time of year where insect activity is practically at a standstill, these small brown winter moths will be seen across the eastern half of the state, sometimes congregating at porch lights by the hundreds. There are other similar-looking native moths active at this time of year, such as the Bruce spanworm moth and the fall cankerworm moth, but they are typically not seen in such large numbers. While the state does not regulate winter moth, some towns/cities do tree treatments, and the Elkinton Lab at University of Massachusetts Amherst currently has a biological control program underway.

Male and female winter moth. Females have tiny, vestigial wings and are flightless.


The survey for 2016 is now closed. Thank you for your participation. The information you share will help assess the distribution of this invasive pest in our state.

Helpful links:

  • For more information on winter moth biology and management, see this fact sheet from UMass Extension.
  • For more examples of male and female winter moths and related species, see this photo gallery.
  • If you would like to email a photo, please use our Pest Reporting Form.

Looking Back: Forest Pest Awareness Month 2016

Once again in 2016 August was officially declared Forest Pest Awareness month by the governor as part of an effort to raise awareness about invasive insects such as Asian Longhorned Beetle and Emerald Ash Borer. Over the course of August, much was done to increase the public’s awareness of these introduced pests.

forest pest awareness month decree

The official announcement and proclamation for Forest Pest Awareness Month, signed by the governor

Due to the longevity of the Asian Longhorned Beetle (ALB) eradication program in central Massachusetts, it remains important to continually update citizens on the efforts of the eradication program and the current state of the infestation. The most common questions we get at public events are about whether ALB has spread to a certain town or city, how close the ALB Cooperative Eradication Program is to completely getting rid of the beetle, and how to identify this invasive pest. People also often ask questions about other insects they’ve seen and are concerned about, or about suspicious damage to one of their trees. We are always happy to answer these questions and help teach curious citizens how monitor their own trees and properties for invasive pests.

Here is just a sampling of events we attended during this year’s Forest Pest Awareness Month.

Green Hill Neighborhood Association Annual Picnic, Worcester, 8/06/16

Tabling a local event

The ALB Cooperative Eradication Program provided attendees with up-to-date information about their work. Being invited to table at this event was a great opportunity to address homeowners directly in a neighborhood hit hard by the ALB infestation.
9th Annual Barbara J. Walker Butterfly Festival, Worcester, 8/13/16

A family models ALB antennae

The Butterfly Festival is a popular event held each year at Worcester’s Broad Meadow Brook Audubon Conservation Center and Wildlife Sanctuary. Families who attended learned how to identify ALB while enjoying the beautiful walking trails (populated with ALB-susceptible maples). We gave away lots of ALB antennae headbands, always a very popular item with kids and families…after learning about how to positively identify ALB, kids can look like one!

Westborough Farmers Market, Westborough, 8/18/16

Westborough lies outside the quarantine area, and luckily has not experienced any ALB survey activity. However, it borders the eastern edge of the quarantine, and market attendees were very interested in learning about the beetle and current eradication efforts.

37th Annual Holden Days, Holden, 8/27/16

A typical table setup for our outreach events

Large events like Holden Days bring a steady stream of people to our table with great questions about ALB. We were visited by plenty of very knowledgeable students eager to share what they knew about ALB, as well as outdoor-oriented families looking for information about how to identify ALB and the trees it attacks.

During August we also sent outreach packages to 5 additional events and organizations, and distributed over 1,200 items such as ALB ID cards, host tree species guides, temporary tattoos, and antennae headbands. But forest pest awareness does end with August! Asian Longhorned Beetles pose a year-round threat that has to be constantly monitored. If you have an event that you would like to hand out ALB material at, you can order educational materials free of charge at, or reach out to if you’re interested in MDAR staff attending a future event your organization is planning.

Emerald Ash Borer Continues its Spread


With the recent detection of emerald ash borer (Agrilus planipennis, “EAB”) in three new municipalities (Boxford, Newton and Wilbraham), the total number of Massachusetts counties impacted by this pest has now risen to six (see Table 1). Emerald ash borer, an invasive wood-boring pest that threatens our forests and urban landscapes, was first discovered in in Berkshire County in the town of Dalton back in 2012. It has since spread to various other counties throughout the state. While the expansion of the state’s EAB infestation is to be expected, agencies such as the Dept. Of Conservation and Recreation (DCR), the Dept. of Agricultural Resources (MDAR), the U.S. Dept. of Agriculture (USDA) and the U.S. Forest Service (USFS) are working together to do all they can to slow its spread.

Since its initial discovery in Detroit, Michigan back in 2002, EAB has killed tens of millions of ash trees across the country and cost billions of dollars in damages. Confirmed infestations range as far west as Colorado and as far south as Texas; Delaware became the most recent state to confirm its presence, just this past August. It is expected that EAB will eventually overtake every state on the eastern seaboard as it continues to devastate native ash populations.

Unfortunately, officials have determined this pest spreads too far too fast to stop its spread. Instead efforts are currently focusing on mitigating EAB’s impact and monitoring its overall movement. One such strategy involves targeting areas in proximity to a known infestation with a combination of pheromone traps and so-called “sink trees”, trees that have been girdled to make them more attractive to wood boring pests. This allows foresters to track the general direction EAB is moving in and gives us better information to better prepare neighboring communities for the arrival of this pest. There is also a citizen science program, known as Massachusetts Wasp Watchers, that tracks a native non-stinging wasp (known as the Smokey-Winged Beetle Bandit, Cerceris fumipennis) that preys on EAB and other related beetles. The program, known as “biosurveillliance,” is what led to the discovery of EAB in the city of Newton earlier this summer. DCR is also participating in a biocontrol program that attempts to suppress established populations of EAB through the release of tiny parasitoid wasps that target the beetle’s larvae and eggs.

With all of these surveillance and management tools at hand, there is a lot communities themselves can do to prepare for this pest. To learn more about EAB and what steps you and your community can take to manage your ash trees before they are impacted, visit: