Here’s some hot news from our neighbor to the north (and east). The Massachusetts Introduced Pest Outreach Project reports that “Chrysanthemum white rust (Puccinia horiana, “CWR”), a serious fungal disease of chrysanthemums, has been discovered in Massachusetts. Infected plants were discovered at nurseries and at retail locations, with diagnoses confirmed by plant pathologists from USDA APHIS-PPQ. This pathogen can spread quickly in greenhouse and nursery environments, causing severe crop losses.

Over the last 25 years, localized introductions of chrysanthemum white rust have occurred within the United States or Canada and have subsequently been eradicated. Earlier this month, CWR was reported to have overwintered in an outdoor planting of mums at a residential property in Connecticut, and was also found at nurseries in Pennsylvania and Michigan. CWR is a pest of quarantine significance in the United States, requiring state and federal regulatory action. The MA Department of Agricultural Resources and USDA APHIS-PPQ are currently working together with nurseries to eradicate it from Massachusetts.

Chrysanthemum white rust attacks several species of chrysanthemums, including potted mums, spray mums, and garden mums. The symptoms of this disease are very distinct. Light green to yellow spots up to 5mm in diameter appear on the upper surface of the leaf. The spots become brown and necrotic with age. Raised beige to pink pustules form on the underside of leaves. These pustules become white with age. Pustules are most common on young leaves and flower bracts but may form on any green tissue or the petals. Symptoms are more likely to be observed during or following cool, wet weather.

For more information about chrysanthemum white rust, including lists of susceptible and resistant species and a detailed eradication protocol, see our fact sheet at http://massnrc.org/pests/pestFAQsheets/chrysanthemumwhiterust.html. If you think you have seen Chrysanthemum White Rust, please call the MDAR Plant Pest Hotline at 617-626-1779, or report it on this website: http://massnrc.org/pests/.”

The Mass. Introduced Pest Outreach Project is a nifty little program and you can learn more about it or sign up to receive you own email copy of their announcements by visiting their web site: http://www.massnrc.org/pests/

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Well, as someone (there’s a debate about whom, but see this wikipedia page) once said, “No plan long survives the first encounter with the enemy.” Here’s how our first day went fighting mile-a-minute vine on Block Island.

Hope Leeson and I arrived on the ferry at 10 am. Thank you Scott Comings and The Nature Conservancy for providing ferry passage. We were met by TNC staff and taken to the site. We quickly located the patch, in the Fresh Swamp Preserve about 30 meters east of Lakeside Drive. We discovered the patch to be much larger and more advanced than I (at least) had been expecting. It extended north from the Preserve path 10-15 meters to a dirt road/driveway (that connects Lakeside Drive with Payne Road) and about 40 meters east to west. The coordinates of the center of the patch are N 41*09.706′ x W 071*34.577′.

Coverage for much of the area was approximately 90%. There were isolated plants and patches on the north side of the driveway as well, the most westerly being almost to Lakeside Drive and the most easterly being opposite the main patch, but on the other side of the road. There were two isolated, somewhat smaller patches on the path about 150 meters east of the main patch (Patch 1)–we called these Patch 2 and Patch 3. They were roughly 8 to 10 meters diameter each, with some stragglers more outlying.

We were joined by four volunteers, including naturalist, RINHS member, and New Shoreham First Warden Kim Gaffett. We took samples of the mile-a-minute vine as directed by Judith Hough-Goldstein. We collected 250 berries, including 150 from the first patch and 50 each from the patches east down the path. We also collected 8 samples of five leaves each from patch 1 and one sample of 5 leaves from each of patches 2 and 3. We also took video and still pictures of the extent of the patch, the pulling process, and other features we thought noteworthy. Hope looked for plants of interest in the understory but found nothing unusual. The scaffold plants consist of about 60% blackberry, 10% elderberry, and about equal proportions of bayberry, multiflora rose, bittersweet, and goldenrod making up the balance.

The mile-a-minute vine had completely covered all other plants except the odd blackberry cane that managed to stick out the top, including climbing over a 15′ high bayberry tree. In some places it was clear the vines were rooted around the perimeter of a shrub patch and had scambled up and over, but in others it was clear they were coming up densely from directly under their scaffold plants. In many places the rooted stems were at least 20 per square meter. Some individual vines were 20 feet long.

The pulling was relatively easy given the circumstances. In many cases it was possible to gather a bunch of stems low down at the edge of a bush and by twisting and pulling, create a hauser of vines that was strong enough to pull down a whole mat from off of a bush. These could be rolled up into a bundle for easy handling and to help prevent berries from dropping off. The thorns of the mile-a-minute vine were wicked if you had exposed skin but, as they are thin, short, and curved, almost any layer of cloth protected you well against them. The hardest part of pulling was dealing with thorns of the blackberry and multiflora rose. They made it hard to get into the bushes and easily pierced gloves, jackets, and even boots. The height of the MaM in the trees as also difficult to deal with. If a vine broke while you were pulling it, which was most of the time, you often couldn’t reach the (heavily fruited) rest of it up in the trees. I think we could have used a long-handled, metal garden rake to reach up and pull it down.

About the berries: the vines had numerous clusters of ripe berries and three or four times as many immature clusters. The berries come off very easily and the pulling released showers of berries onto the ground. Because of the easy with which these berries come off and bounce and roll around, I would recommend against trying to dispose of this material off-site. We initially bagged 9 bags of vines in plastic trash bags but soon abandoned that when it was clear the bags were full of rips from the thorns and there was a great risk of leaving a trail of seeds. After that we piled the vines into a great heap on top of an area already sprouting many many stems. This should keep the birds from getting most of the berries and as this ground will already have to be controlled next year, adding a few more shouldn’t matter. The pile we ended up with is 4 feet high, 4 feet wide, and 6 feet long and so solidly packed you could climb onto it.

Three of us worked until about 2:30 and Hope and I caught the 3 pm boat thanks to Kim and her car. The total person hours on site were 20. We pulled all the vines we could reach between the path and the dirt road, including all the vines at the two isolated patches down the path to the east. We left clumps of vines and berries that we couldn’t reach in the tops of a bush and a tree. There is a huge pile of vines about 10 feet south of the dirt road and there are nine bags stacked at the turnstile, but I’m having misgivings about moving the bags even that far as I’m afraid they’ll be dropping berries everywhere. If they haven’t been moved yet, I think they should left at the main infestation in a pile to solarize and compost on-site.

Given the size and density of the outbreak and the number of ripe seeds released by the pull, we can expect this area to be heavily infested with mile-a-minute next year. Given the absence of significant plants in the understory, I think TNC should consider using a brush-hog on the entire area between the path and the road and keeping it mown for several years until the seed stock of MaM is exhausted. TNC will also have to negotiate access to the land on the other side of the dirt road because there are significant patches there already and by next year there will be much larger ones.

Speaking of close by, when I got back into the office I found an email from Kim Gaffett. Apparently when she returned home yesterday she had a message from someone who’d been talking to one of the pullers. She said something like, “oh, I’ve got that growing at my house!” She lives on Lakeside Drive south of Fresh Pond, about a quarter mile from the other infestation. Kim sent me pictures of this new patch, which looks fairly large. The home owner pulled it all up that afternoon. So at this point, it is clear that MaM has been on Block Island for some years and has spread at least a bit in the Fresh Pond/south-center of the island area. After TNC has had some time to assess the spread of this plant on the island and the availability of resources required if a manual control effort is to be effective, they might want to talk to Judy Hough-Goldstein and Dick Casagrande about the possibility of a biocontrol. Judy is working on a weevil that has already been undergoing field tests in Pennsylvania. For information on this, see her website. Of course biocontrol with a beetle needs to be approached with caution as Block Island is the only R.I. site for important coleopterous rare species such as the federally listed Nicrophorus americanus.

Kim and I and others will keep working into the fall to try to spread word of this plant on Block Island and get a better idea of just how widespread it really is.

That’s the report.
David Gregg

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Mile-a-Minute Vine (Persicaria perfoliata, a.k.a. Polygonum perfoliatum) has been detected in Rhode Island, on The Nature Conservancy’s Fresh Swamp Preserve, on Block Island. The initial observation was made by Paulinka de Rochemont, a butterfly watcher who asked RINHS for help identifying an unfamiliar plant she’d seen on a recent outing. The identification was confirmed by Les Mehrhoff of IPANE and Bill Brumbach of NEWFS and the scope of the infestation was confirmed by Block Island naturalist and RINHS member Kim Gaffett. Here are Kim’s photos of the infestation, which is fairly significant in size. Nice catch, Paulinka!

RINHS is working with The Nature Conservancy’s Block Island Program and the Block Island Community to organize pulling day to collect the vines and keep the ripening berries from being picked up by birds this fall. The event will be on Wednesday, September 24. Details are still being planned, but anyone interested in participating should call RINHS at 401-874-5800. Those coming from the mainland will have to be responsible for their own ferry ticket, but hey, a day in a wildlife preserve on Block Island is worth a lot.

Mile-a-Minute Vine is native to Eastern Asia, including China, Korea, Japan, Taiwan, the Phillipines, and the Malay Peninsula. It is a member of the Buckwheat family (Polygonaceae). It was introduced accidentally into North America in the late 1930’s in Pennsylvania and has spread from there. It is an herbaceous, trailing plant, tolerant of many growing conditions but with a preference for moist soils and sunny situations. It is an annual in the Northeastern United States. It produces bright blue berries attractive to birds, which are the most likely vector in its spread. The fruit floats, so the plant may spread through water courses. The stem of Mile-a-Minute Vine is covered with numerous recurved barbs, from which it gets it’s alternative common name, “Asian Tearthumb.” The barbs assist it to scramble over other vegetation, which it then frequently smothers in dense growth. The dense, barbed growth greatly impairs access to areas for people and wildlife. Control is best acheived by pulling the plants before fruit is set (generally by mid to late summer). Herbicides are effective in killing the plant, but are likely to kill non-target plants that Mile-a-Minute climbs over, resulting in an opening in the vegetation that will promote the growth of surviving vines or new seedlings. For more information see: www.nps.gov/plants/ALIEN/fact/pepe1.htm

RINHS is a non-profit founded in 1994 to support those interested in studying and preserving the natural history of Rhode Island. A membership organization with over 400 members, RINHS facilitates the interests of naturalists through education and outreach programs, publications, web tools, and conferences, and by providing biodiversity data managment and technical assistance in field ecology and administrative capacity to land trusts, municipalities, government agencies, and researchers. Membership is open to all; for more information visit www.rinhs.org, email info[at]rinhs.org, or call 401-874-5800.

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This notice just arrived (August 12, 2008) at RINHS regarding the confirmed presence of asian longhorn beetle just a few miles away from Rhode Island, in Worcester, Mass. Unlike emerald ash borer beetle, ALB has been successfully eradicated elsewhere so vigilance is warranted. I’ll also say that ALB is large and dramatically marked and will make a fine specimen in anyone’s insect collection, so get out there and find ‘em. And if you do, be sure to tell RINHS so we can pass the information along to the appropriate authorities. In Rhode Island, the appropriate authority would be RI DEM Division of Forest Environment:

Catherine Sparks, Chief
1037 Hartford Pike
North Scituate, RI 02857
(401) 647-4389 or 647-3367
fax 647-3590

The maps of the Worcester infestation shown on TV indicate the locus is Joe Schwartz Field, off West Boylston Street a couple miles north of downtown. If you find the beetle in Massachusetts, here’s a link to an online reporting tool:

Here’s a little collage to give you an idea of what to look for.

If you end up with lots of long horn beetles that aren’t the ALB and want to know more about them, the Peterson Field Guide to Beetles is a very good start and the best source for information is the Long Horn Beetles of Illinois published by Illinois Natural History Survey and still available through them (www.inhs.uiuc.edu).

Here’s a PDF you can download with lots of official USDA advice on ALB control:
albguidelines1-07.pdf

Stay tuned to www.rinhs.org as the counter attack to this latest invasion unfolds.

 

DEP and Connecticut Agricultural Experiment Station Respond to Presence of Asian Longhorn Beetle in Worcester, MA

The Connecticut Department of Environmental Protection (DEP) and the Connecticut Agricultural Experiment Station (CAES) today announced that federal agricultural officials have confirmed the presence of the Asian Longhorn Beetle (ALB) in nearby Worcester, Massachusetts. This beetle is a serious pest in other parts of the world and can kill hardwood trees in roadside plantings, shelterbelts, and plantations. In the United States, the beetle prefers maple species.

“This discovery is certainly a concern,” said Christopher Martin, DEP Director of Forestry. “The close proximity to Connecticut definitely places our forests at risk. We are asking Connecticut residents to keep their eyes open and report possible ALB infestations to CAES or the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine (APHIS). Early detection is the best defense. Residents should also remember to purchase firewood from local sources and not transport firewood from out of state. Firewood arriving to Connecticut from infested areas can easily bring along unwanted hitch hikers like ALB and other harmful forest pests.”

ALB typically does not spread quickly on its own, but it can easily be inadvertently transported in untreated firewood and other forest products. Trees affected include:

· Boxelder,

· Norway, Red, Silver, and Sugar maples,

· Alders, Birches, Elms, Horsechestnut, Poplars, and Willows.

A complete list of host trees in the United States, however, has not been determined. Previous infestations have occurred in New York, Illinois and New Jersey.

Residents suspecting they have seen ALB should report their findings to CAES at (203) 974-8474 or (203) 974-8485. Residents can also report sightings to APHIS via their website at http://www.aphis.usda.gov/.

# # #

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RINHS received the following message regarding mitten crabs via the Northeast Aquatic Nuisance Species Panel this morning (7/22):

>>> “Ferrante, Carin” <ferrantec[at]si.edu> 7/21/2008 3:41 PM >>>
Hi All,
[at the link below] you will find the most recent report on Chinese Mitten Crabs found along the East Coast of the US. We now have 19 confirmed Mitten Crabs. This includes the first and second confirmed report in New Jersey and four more records in New York.

This update will be posted on our website (http://www.serc.si.edu/labs/marine_invasions/index.jsp ) as of 5pm today.  We have not sent out any press release, but I expect, we may receive inquiries.  The information provided here should prepare you for any questions or you can direct them to the hotline for more information, 1-443-482-2222.

This email has been distributed to the Mitten Crab Network and various state agencies that have been involved in monitoring over the last year. Please distribute this to your colleagues and respective mailing lists so people are kept informed of current information. Please let me know if you have any concerns or wish further clarification or information. Thanks, Carin

mitten-crab-update-july-2008.pdf

Remember that Rhode Island contacts for mitten crab information (and sightings, but hopefully not) are:

David Gregg
Rhode Island Natural History Survey
Room 200 Ranger Hall/Room 101 Coastal Institute Kingston, URI
P.O. Box 1858
Kingston, RI 02881
874-5800 or invasives[at]rinhs.org

Kevin Cute
Coastal Resources Management Council
Stedman Gov’t Center, Suite 3
4808 Tower Hill Road
Wakefield, RI 02879-1900
401.783.3370 or kcute[at]crmc.ri.gov

Christopher Deacutis
Narragansett Bay Estuary Program
URI Bay Campus Box 27
Narragansett, RI 02883
401-874-6217 or chrisd[at]nbep.org

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RINHS Announces a New Series of Natural History Skills Workshops

The Skills Workshops, to be held every month or so, will be chances for small groups of beginner and intermediate naturalists to work together with more advanced naturalists to develop their skills with particular groups of organisms. Workshops will focus on species identification, field survey tricks and techniques, the relevant literature, and other tools used to identify and curate specimens. The workshops are hands-on and will use collections, equipment, and reference literature.

The first workshop will be Introduction to the Hymenoptera (the Ants, Bees, and Wasps), with Howard Ginsberg, Research Ecologist with the USGS Pawtuxent Research Station. It will be from 7 P.M. to 9 P.M., on Monday, May 19, at URI’s Kingston campus, Woodward Hall, Room 9. For more info on Ginsberg, see his profile on the USGS web site.

With the help of museum specimens, Dr. Ginsberg will point out the diagnostic features used to distinguish among the Suborders and Superfamilies within the Order Hymenoptera. The Hymenoptera include many species of great economic value and conservation interest including the honey bee and other pollinators, wasps that damage timber and that control crop pests, and ants that clean the ground, plant seeds, and cycle nutrients and soil. Despite their importance, people know less about Hymenoptera than about other more aesthetically spectacular orders such as Odonata (dragonflies and damselflies) or Lepidoptera (butterflies and moths). This workshop will help people interested in learning more about the Hymenoptera get their bearings in the taxonomy, techniques, and literature.

Future workshops being planned include subjects such as moths, grasses, and worms. Tune in regularly to www.rinhs.org to hear about the workshops as they’re announced. Or better yet, join RINHS and get word directly over the Survey listserv as a benefit of membership.

The workshop is free for members of RINHS and $5 for non-members (membership starts at just $15 and you may join when you sign up for the workshop). Space is limited and reservations are required by Monday, May 19 at Noon. Call 401-874-5800 or email info@rinhs.org to reserve a spot.

Directions: Woodward Hall is at the end of East Alumni Avenue, off of Upper College Road. Upper College Road runs north from the traffic light on Rt. 138 in Kingston.

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Interesting article in yesterday’s ProJo about work being done by URI scientists to locate, and possibly clone, healthy Eastern Hemlocks in Rhode Island. These trees are being destroyed by two non-native invasive pests, the hemlock wooly adelgid, and the elongate hemlock scale.

Link to the full article here.

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