Hi Mike, and others who have responded,
Kevin Smith's review "An organismal view of dendrochronology" in
Dendrochronologia mentions examples of white rings that develop in poplar
and birch in response to insect defoliation or crown loss in winter
storms.
I am not sure what would cause dark rings in oak, but agree that it is
something that is activating a compartmentalization response and/or
creating a barrier zone. Because these occurrences are a complete, single
growth ring that encompasses the whole tree, I suspect an environmental
factor.
Mike, you might check for a correlation between the year of the ring and
winter injury, late or early frost, an extreme winter or summer
temperature event, or maybe even flooding or insect defoliation.
In response to Ed Barnard, I don't think these rings indicate oak wilt, as
infections in white oaks that survive the first year generally show up as
incomplete and spotty dark rings, with additional partial dark rings in
the same affected areas the following year in surviving white oaks. Among
oaks, red oaks die very quickly of oak wilt, so you wouldn't see this long
term survival.
On a different dendrochronology note:
If anyone is familiar with "islands" of enclosed phloem in red or live
oaks that apparently generate a new layer of xylem-generating cambium
after cambium injury please let me know. I have found this response in
several oak species after attack by the cambium-feeding gold-spotted oak
borer (GSOB), Agrilus coxalis, which is now a problem pest in Southern
California.
I am developing methods of back-dating such enclosed phloem to reconstruct
the history of the pest's residence and spread within and among stands,
and determine onset of tree mortality after attacks. So I need to know
other factors -- biotic or environmental -- that may generate similar new
layers of xylem external to patches of enclosed phloem. I have enclosed
pictures of the enclosed phloem and response wood that develops after GSOB
attack if inner phloem has not been killed by very heavy attacks and/or
pathogens associated with this decline.
Thanks!
Paul Zambino
><><><><><><><><><><><><><><><><><><><><><
Paul Zambino, Ph.D.
Plant Pathologist, Forest Health Protection
Southern California Shared Service Area
San Bernardino NF - SO
602 S. Tippecanoe
San Bernardino, CA 92408-3430
Ph: (909)382-2727 FAX: (909)383-5586
Cell: (909)215-0394
Email: pzambino(a)fs.fed.us
><><><><><><><><><><><><><><><><><><><><><
"Barnard, Ed" <barnare(a)doacs.state.fl.us>
Sent by: rg70300-forent-bounces(a)lists.iufro.org
11/21/2009 11:09 AM
Please respond to
"IUFRO RG 7.03.00" <rg70300-forent(a)lists.iufro.org>
To
"IUFRO RG 7.03.00" <rg70300-forent(a)lists.iufro.org>
cc
Subject
Re: [IUFRO RG 7.03 FORENT] Fwd: Dark rings in red oak logs
Folks (and particularly Mike Albers),
Very interesting! I really have no idea, being for the most
part a Pathologist in Florida dealing primarily with pines. As a
pathologist, a thought comes to mind, but you should try to verify even
the possibility of this with someone who deals with oak wilt (caused by
Ceratocystis fagacearum). You are (as I understand it) in an area where
this disease occurs, and red oaks are susceptible hosts, often displaying
vascular staining or streaking. Most of the time infected red oaks die,
but I do know that if infections of some vascular wilts are not lethal,
recovery can occur, sometimes ?compartmentalizing? the pathogen in
interior vascular tissues ? together with its associated vascular
staining. Any chance that these trees might be oak wilt survivors? This
could possibly be evaluated in a laboratory.
Ed
From: rg70300-forent-bounces(a)lists.iufro.org
[mailto:rg70300-forent-bounces@lists.iufro.org] On Behalf Of Mike Albers
Sent: Thursday, November 19, 2009 11:44 AM
To: rg70300-forent(a)lists.iufro.org
Subject: [IUFRO RG 7.03 FORENT] Fwd: Dark rings in red oak logs
Any idea what would cause dark rings in red oak logs as in the attached
pictures?
The dark rings run the length of the logs. So far this has been seen on a
number of sites in 3 or 4 counties in Minnesota. Not all red oak trees on
a site have the dark rings.
My first guess is that it is a barrier zone resulting from a wound or
injury of some type. However it seems strange that it forms a complete
cylinder that reaches the ends of the logs. I didn't see any logs where
the dark ring only went part way around a log. Also there were some logs
that had obvious injuries with decay and discoloration but these logs did
not form rings or even have distinct barrier zones going even part way
around the log.
I've only looked at logs like this while in the mill, not on the site
where they were harvested. At first, the thought was that these rings were
the result of something happening 16 to 17 years ago. This will take more
investigation, but it looks to me like the time period varies anywhere
from 6 to 35 years. Also at this time I can't say if the time period
varies ibetween sites, or if the time period varies from log to log on the
same site.
Any suggestions would be appreciated.
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115_______________________________________________
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To post a message to all list members, send email to:
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Any idea what would cause dark rings in red oak logs as in the attached pictures?
The dark rings run the length of the logs. So far this has been seen on a number of sites in 3 or 4 counties in Minnesota. Not all red oak trees on a site have the dark rings.
My first guess is that it is a barrier zone resulting from a wound or injury of some type. However it seems strange that it forms a complete cylinder that reaches the ends of the logs. I didn't see any logs where the dark ring only went part way around a log. Also there were some logs that had obvious injuries with decay and discoloration but these logs did not form rings or even have distinct barrier zones going even part way around the log.
I've only looked at logs like this while in the mill, not on the site where they were harvested. At first, the thought was that these rings were the result of something happening 16 to 17 years ago. This will take more investigation, but it looks to me like the time period varies anywhere from 6 to 35 years. Also at this time I can't say if the time period varies ibetween sites, or if the time period varies from log to log on the same site.
Any suggestions would be appreciated.
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115
Mike Albers
Forest Health Specialist
MN DNR-Forestry
1201 E. Hwy. # 2
Grand Rapids, MN 55744
(218)-327-4115
A graduate research assistantship is available to support a student pursuing
an MS or PhD degree with my program through the Department of Forest and
Wildlife Ecology at the University of Wisconsin-Madison. A generous
stipend, medical benefits, and tuition waiver are included. Only candidates
with a strong background in plant and forest sciences, as well as plant
pathology and mycology, are encouraged to apply. Excellent abilities in
spoken and written English are required. Support can begin in fall semester
2010.
Please see the web page of the Department of Forest and Wildlife Ecology
(http://forestandwildlifeecology.wisc.edu/) and the link there for
application instructions. Information regarding recent activities in my
program can easily be obtained by searching the web for publications.
Glen R. Stanosz, Ph. D.
Professor of Forest Pathology
Department of Plant Pathology
Department of Forest and Wildlife Ecology
University of Wisconsin-Madison
1630 Linden Drive
Madison, WI 53706 USA
telephone: 608-265-2863
fax: 608-263-2626
email: grs(a)plantpath.wisc.edu
FOREST PATHOLOGY: research, teaching, and outreach to keep trees and forests
green and growing!
Colleagues - Please circulate to all interested persons:
The Missouri Department of Conservation is seeking candidates for the Forest Pathologist (Resource Scientist) position located in Columbia, Missouri, USA. The Pathologist partners with the Forest Entomologist to monitor forest health and provide forest health information to resource managers, landowners and the general public in Missouri. The Pathologist provides leadership in Department responses to emerging forest disease issues and conducts forest pathology research relating to forest health monitoring and resource management. The job description and information for applying online are available at this site:
http://mdc.mo.gov/about/jobs/<http://webmail/owa/redir.aspx?C=8fde18d6b1514768b1dbe8ad86318409&URL=http%3…>
Deadline for applications is January 15, 2010.
--------------------------------------------------------------
Robert Lawrence, Ph.D.
Resource Scientist - Forest Entomologist
Missouri Department of Conservation
1110 South College Ave.
Columbia, MO 65201
Tel: 573-882-9909, ext. 3303
Fax: 573-882-4517
E-mail: Robert.Lawrence(a)mdc.mo.gov<http://webmail/owa/redir.aspx?C=8fde18d6b1514768b1dbe8ad86318409&URL=mailto…>
---------------------------------------------------------------
Dear Forest Pathologists:
Mark your calendars! The Fourth International Rusts of Forest Trees
Conference will be held in beautiful Florence, Italy, May 3-7 2010.
Stay tuned for further details or visit the web site at
http://www.iufro.org/science/divisions/division-7/70000/70200/70205/activit…
Hope to see you in Florence!
Salvatore Moricca
Richard Hamelin
Nancy,
The problem is that it takes several years to produce a broom of a size
that results in culling, and hence the current culls are almost
certainly a legacy from before the time of chick weed control. The
broom in your picture is at least five years old.
So, even if chickweed control is effective, it will take several more
years before the damage disappears.
Infection by basidiospores occurs in the spring from telia on dead
foliage of the previous year, and the first symptom is a slight swelling
of the infected twig a year or more later. Two years after infection
the first systemically infected shoots appear. Assuming that chickweed
control became effective in 2007, then 2007 was the last possible year
of infection (from telia on 2006 chickweed foliage). The first
systemically infected shoots on these infections would have been
produced in 2009. They would be nearly impossible to find this late in
the year, but they should be visible early summer 2010 when the aecia on
their new shoots are in their full glory.
But there is a further consideration. Rusts of this sort typically have
wave years of infection. I would expect that the large majority of
brooms in a single plantation belong to a single or at most a few age
cohorts. This means that you may have to wait several years before you
can begin to be confident that the chickweed control has worked (or that
other hosts are involved).
Bart van der Kamp
UBC
Dear Forest Phytophthorologists,
This is a reminder that earlybird registration and abstract submission for
the 5th IUFRO Phytophthora diseases in forests and natural ecosystems
meeting close 31 October 2009. The meeting will begin in Auckland, New
Zealand on 7 March 2010 and we will travel together to Rotorua for the
remainder of the meeting, which will finish on 12 March 2010.
Further information is available at the conference homepage:
http://www.phyto2010.com/index.html
Regards, Tod Ramsfield
Tod Ramsfield, Ph.D.
Molecular Forest Pathologist
Forest Biosecurity and Protection
Scion*
Private Bag 3020
Rotorua
3046
New Zealand
Phone: 64-7-343-5534
Mobile: 64-27-366-1422
Fax: 64-7-348-0952
e-mail: tod.ramsfield(a)scionresearch.com
*Scion is the trading name of the New Zealand Forest Research Institute,
Ltd.
Hello Forpathers,
I am forwarding this message at the request of our diagnostician,
Nancy Taylor (taylor.8(a)osu.edu) If anyone has any insights, please
share directly with Nancy.
I apologize in advance if you see this multiple times.
Thanks!
Enrico
>
>
>Hi Diagnosticians,
>
>A few Christmas tree growers in Upstate NY are having problems with
>Fir Broom Rust (Melampsorella) on their fraser firs. This disease,
>with the disfiguration it causes on random branches, has lead to
>loss of hundred of trees that became unmarketable. The main
>alternate hosts for this disease, chickweeds, have been controlled
>in the affected plantings about two years ago. The disease still is
>presenting a problem for some growers. One reference indicates that
>ferns may also be alternate hosts. The growers have some
>naturalized ferns (hay scented and sensitive ferns) with no apparent
>symptoms in nearby hedge rows. Not much has been written about
>this disease. Does anybody have insights they could share.
>Fungicides? Timing?
>
>Thanks,
>
>Brian
>
>Brian Eshenaur
>Cornell University Extension
>New York State Integrated Pest Management Program
>Internet: http://www.nysipm.cornell.edu
>
>249 Highland Avenue
>Rochester NY 14620
>p 585.461.1000 ext 240
>f 585.442.7577
>
>
>
>Content-Type: text/plain; name="CANIT-VOTING-LINKS-948903426-2332d04102cd.txt"
>Content-Disposition: inline;
> filename="CANIT-VOTING-LINKS-948903426-2332d04102cd.txt"
>Content-Transfer-Encoding: 7bit
>MIME-Version: 1.0
>X-Mailer: MIME-tools 5.420 (Entity 5.420)
>
>
>--
>BEGIN-ANTISPAM-VOTING-LINKS
>------------------------------------------------------
>
>Teach CanIt if this mail (ID 948903426) is spam:
>Spam: https://antispam.osu.edu/b.php?i=948903426&m=2332d04102cd&c=s
>Not spam: https://antispam.osu.edu/b.php?i=948903426&m=2332d04102cd&c=n
>Forget vote: https://antispam.osu.edu/b.php?i=948903426&m=2332d04102cd&c=f
>------------------------------------------------------
>END-ANTISPAM-VOTING-LINKS
--
Pierluigi (Enrico) Bonello, Assoc. Professor
Dept. of Plant Pathology
The Ohio State University
201 Kottman Hall
2021 Coffey Road
Columbus, OH 43210
Tel: (614) 688-5401
Lab: (614) 688-5409
Fax: (614) 292-4455
http://plantpath.osu.edu/people-and-programs/faculty-directory/bonello-pier…
Environmental Science Graduate Program (ESGP)
http://esgp.osu.edu/
Plant Molecular Biology and Biotechnology Program (PMBB)
http://pmbb.osu.edu/
To all Forest Pathers:
I am currently looking for Tree of heaven(Ailanthus altissima) seed from the
following
regions/states of the U.S. & Canada:
Northeast-
VT, NH, CT,RI,
Quebec, New Brunswick, Nova Scotia
Southeast-
GA, AL, LA, MS, FL,
TN,
KY,AR
Midwest-
MN,SD,ND,MI,WI,NE,KS,MO,IA,IN,Manitoba, Saskatchewan
West-
WA,OR,WY,MT,NV,UT,CO, Alberta, BC
Southwest-NM,TX,OK, Mexico
We
have already collected seed from all non-listed states. We are also aware that
Ailanthus may not exist in some of the states listed. There is evidence that
Ailanthus was introduced multiple times into this country on both coasts
possibly suggesting that sub-populations of this species may exist if seed came
from geographically different areas in China. We are
currently working with a Verticillium fungus as a potential control of
Ailanthus and want to test to see if all subspecies of Ailanthus are equally
susceptible to our fungus, assuming that subspecies
even exist. Please Email me if you have seed or could get seed (100-250 seeds
if possible) from those regions listed above. Samples can be sent to the
address below. Please dry before sending. Helpful information includes GPS
coordinates or closest town name, number of trees seed was collected from (1 or
>1), general setting (roadside, forest, etc.). Again, thank you for your
help.
Regards,
Matt Kasson
Matthew T. Kasson
PhD Candidate
401
Buckhout Lab
Department of Plant Pathology
The Pennsylvania State University
University Park, PA
16802
phone: 814.308.2887
email:
mtk178(a)psu.edu
Please join us at the Continental Dialogue meeting. Note that the deadline
for reduced rate rooms is 10.5.09. Susan
----- Forwarded by Susan Frankel/PSW/USDAFS on 10/05/2009 09:10 AM -----
Continental Forest Dialogue <continetalforestdial(a)resolv.org>
10/05/2009 08:52 AM
To
Mark Lewis <mlewis(a)resolv.org>
cc
Paul De Morgan <pdemorgan(a)resolv.org>, Dana Goodson <dgoodson(a)resolv.org>
Subject
REMINDER - Invitation to the Fifth Continental Dialogue Meeting - October
27 - 28, San Francisco, CA
Greetings.
As a reminder, the Fifth Continental Dialogue meeting is taking place
October 27-28 ? less than 4 weeks to go. Below is the original invitation
and information on the field trips, meeting agenda, how to register, and
accommodations. Please secure your registration soon to ensure that you
can join us for this exciting meeting.
While online registration for the meeting will remain open until October
20, there are two important deadlines to keep in mind:
1. HOTEL RESERVATIONS ? We have arranged a special rate ($129) for
hotel rooms at the Hyatt at Fisherman?s Wharf. Today is the last day to
take advantage of the negotiated rate, and the rooms have been filling up
quickly. There may be a few rooms left at the $129 rate, but please be
prepared for the hotel block to fill and close soon. Once the room block
has filled up, the $129 rate will no longer be guaranteed. After that
point, you may still reserve rooms at the Hyatt at non-guaranteed market
rates.
To register, please visit:
https://resweb.passkey.com/Resweb.do?mode=welcome_ei_new&eventID=1442203
2. PORT OF OAKLAND FIELD TRIP ? Registration for the Port of Oakland
trip has now closed. An advance security check is required for the trip.
If you have signed up for the Port of Oakland trip, you will be contacted
by Customs and Border Patrol in the next week or so. When requested,
please be prepared to provide your full name, date of birth, state and
city of birth.
3. MARIN COUNTY / SUDDEN OAK DEATH TRIP ? The trip to witness Sudden
Oak Death in Marin County remains open for registration. To attend, please
complete your registration at:
https://www.energymeetings.com/calendar/register.asp?CalendarID=10859
Please let us know if you have any questions and/or comments.
Regards,
Paul, Dana, and Mark
Paul De Morgan Dana Goodson Mark Lewis
Senior Mediator Facilitator Associate
RESOLVE RESOLVE RESOLVE
435.750.7075 (ph) 202.965.6209 (ph) 202.965.6211
(ph)
pdemorgan(a)resolv.org dgoodson(a)resolv.org
mlewis(a)resolv.org
Continental Dialogue on Non-Native Forest Insects and Diseases
October 27 ? 28, 2009
At Fort Mason Center
San Francisco, CA
Greetings:
The Continental Dialogue Steering Committee is pleased to invite you to
join other leaders from the Pacific coast and around the country who are
working to address the growing threat to North American forests from
non-native insects and diseases. The Fifth Continental Dialogue meeting
will take place on Tuesday and Wednesday, October 27 ? 28, 2009 in San
Francisco, California. The Steering Committee has worked diligently to
include a host of emerging issues in the meeting agenda. The meeting also
provides an opportunity for participants to experience one of two exciting
field trips.
This meeting will serve as an opportunity for this diverse group to build
on the successes of the last year and plan for the future of the Dialogue.
Specific objectives include: cultivating collaborations toward action to
address the threat of non-native forest insects and diseases; linking
state and local actions to Continental Dialogue efforts to enhance
national policies and strategies; enlisting communities in the battle
against non-native insects and diseases impacting their trees; and
identifying and agreeing on needed actions for Continental Dialogue to
take in the upcoming year. We invite you to join us in this important
effort.
We hope you will attend, or, if you are not able to attend, you will
consider sending a trusted member of your organization.
Please note that some funding is available to assist participants with
travel costs. If you are interested in participating and these expenses
would preclude your attendance, please contact Mark Lewis of RESOLVE (
mlewis(a)resolv.org; 202-965-6211).
Registration
To register, please go to:
https://www.energymeetings.com/calendar/register.asp?CalendarID=10859.
Registration for this meeting is limited and will be honored on a ?first
come-first serve? basis. Please note that online registration will close
on Tuesday, October 20th. After that date, you will be able to register
onsite. Registration payment will be accepted onsite by credit card,
check, or cash (please bring exact change). Please make checks payable to
RESOLVE and mail to RESOLVE, c/o Mark Lewis, 1255 23rd St. NW, Suite 875,
Washington D.C. 20037.
Thanks to a private grant, we are able to cover a significant portion of
facility costs. There is, however, a registration fee that will cover all
meals, refreshments and attendance on one of two concurrent field trips.
The cost to attend the full event is $75; the cost for attending the first
day only (Tuesday, October 27th) will be $45. This includes attendance on
one of the field trips. The cost for attending the second day only
(Wednesday, October 28th) will be $30.
For more information and updates regarding the meeting, as well as
existing background materials, please go to
http://www.continentalforestdialogue.org/events/dialogue/2009-10-27/index.h…
.
Meeting Agenda
Attached you will find a draft agenda which defines the meeting goals and
describes the presentations, plenary discussions, and breakout
deliberations we are planning to help us achieve the meeting goals. The
document also includes draft agendas for two field trips (described
below).
We will be distributing additional background materials closer to the
meeting date.
Field Trips
The Fifth Dialogue Meeting will include two field trips, to take place
concurrently on the morning of Tuesday, October 27th. Meeting attendees
will have the opportunity to attend ONE of the two trips. If you want to
attend one of these trips, you will need to indicate which of the trips
you plan to attend when registering for the meeting. There are space
constraints for one of the trips and logistical considerations for both,
so please plan to register as early as possible to guarantee a spot. The
cutoff date for field trip registration is Tuesday, October 20th.
Both trips will depart by bus from the Hyatt at Fisherman?s Wharf at
approximately 7:30 am on October 27th and conclude between 12:15 and 12:30
pm when the buses return to the Hyatt. Following the field trips,
attendees will proceed to Fort Mason to register and begin the first day
of the meeting.
Field Trip #1 ? Experimental Nursery and Sudden Oak Death (Marin County,
CA)
One group will visit the experimental nursery at Dominican College in San
Rafael, California, followed by an excursion to forested areas at Muir
Woods in Marin County to witness the effects of Sudden Oak Death. This
trip does not have a limit on the number of people who can attend.
Field Trip #2 ? Port of Oakland (Oakland, CA)
Another group will visit the Port of Oakland to learn about wood packaging
and the inspection activities by Port staff. This trip will be limited to
30 participants and require a security check in advance of the trip.
Participants will be required to provide some form of personal information
(e.g., Social Security number) for review by the Port of Oakland. Further
information about this field trip will be provided as it becomes
available, including instructions on what information you need to share
and how to share it.
Overnight Accommodations
A subsidized rate of $129/night plus tax has been secured for overnight
accommodations at the Hyatt at Fisherman?s Wharf, which is near the Fort
Mason meeting venue.
Attendees must make their own reservations. You may contact the Hyatt at
Fisherman?s Wharf at (888) 421-1442; please reference the ?Nature
Conservancy: Continental Forest Dialogue? group rate. Reservations can
also be made online at
https://resweb.passkey.com/Resweb.do?mode=welcome_ei_new&eventID=1442203.
Please note that the availability of overnight accommodations cannot be
guaranteed after Monday, October 5, 2009.
For questions regarding meeting objectives or the background documents
posted on the web site, please contact Frank Lowenstein of The Nature
Conservancy at flowenstein(a)tnc.org or by phone at 413-229-0232, extension
224. If you have any logistical questions, please contact Mark Lewis of
RESOLVE (mlewis(a)resolv.org; 202-965-6211).
We look forward to seeing you at this exciting event in October.
Very truly yours,
The Steering Committee, Continental Dialogue on Non-Native Forest Insects
and Diseases
Frank Lowenstein, Director
Forest Health Program
The Nature Conservancy
Nadine Block, Manager, Forest Policy
American Forest & Paper Association
Michael Buck, Sustainable Forestry Representative
National Association of State Foresters
Faith Campbell, Senior Policy Representative
The Nature Conservancy
Allegra Cangelosi, Senior Policy Analyst Ecosystem Team
Northeast Midwest Institute
Bill Dickerson
Animal and Plant Health Inspection Service, USDA
Keith Douce, Professor of Entomology
University of Georgia
Donald Eggen, Forest Health Manager
Pennsylvania Department of Conservation & Natural Resources
Bob Ehart, Animal & Plant Health Safeguarding Coordinator
National Association of State Departments of Agriculture
Jodie Ellis, Exotic Insects Education Coordinator
Purdue University, Dept. of Entomology
Joe McCarthy, Senior Forester
City of Chicago, Bureau of Forestry
Teresa McDill, Supervisor
Invasive Species Unit
Minnesota Department of Agriculture
Ken Rauscher, Past President
National Plant Board
Michigan Department of Agriculture
Craig Regelbrugge, Senior Director of Government Relations
American Nursery & Landscape Association
Lin Schmale, Senior Director of Government Relations
Society of American Florists
Carl Schulze, President
National Plant Board
Director, Division of Plant Industry
New Jersey Department of Agriculture
John Peter Thompson, Consulting Representative
American Nursery & Landscape Association
Phyllis Windle, Senior Scientist
Global Environment Program
Union of Concerned Scientists
