Many years ago I saw similar sphaeroblasts of ¼ to ½ inch diameter that developed within resin pockets of the bark on balsam fir in northern Minnesota with very similar appearance to the beech bumps. Some were perfectly egg-shaped and free from attachment to the xylem, others had vascular connections. All had beautifully swirled grain.
><><><><><><><><><><><><><><><><><><><>
Paul Zambino, Ph.D.
Plant Pathologist, Forest Health Protection
USDA Forest Service, Region 1
Coeur d'Alene Field Office
3815 Shreiber Way
Coeur d'Alene, Idaho 83815
Ph: (208)765-7493 FAX:(208)765-7307
Email: pzambino(a)fs.fed.us<mailto:pzambino@fs.fed.us>
><><><><><><><><><><><><><><><><><><><>
From: rg70200-forpath-bounces(a)lists.iufro.org [mailto:rg70200-forpath-bounces@lists.iufro.org] On Behalf Of d-lonsdale
Sent: Wednesday, January 30, 2013 4:51 AM
To: bonello.2(a)osu.edu; rg70200-forpath(a)lists.iufro.org
Subject: Re: [IUFRO RG 7.02 FORPATH] FW: Bumps on Beech
Dear Enrico,
I often see similar bumps on European beech and have identified them as sphaeroblasts, which are thought to develop from dormant buds. In place of a shoot, a ball of wood develops, encased in bark. A sphaeroblast can be easily detached with a mallet etc., since its woody connection to the stem is very narrow. The large sphaeroblast in the attached picture shows an arrow pointing towards the woody connection on the proximal side. Some of the bark has been pared away with a knife to expose this connection. The picture also shows wood exposed on the proximal side (with partial occlusion), perhaps because of an old injury or as a result of bark dieback. Similar canker-like areas can be seen on the bumps in John McLaughlin's photos but I doubt whether these bumps are sphaeroblasts, since their close alignment is unlikely to correspond with the positions of dormant buds.
Small bumps on American beech can also be induced by the scale insect Xylococculus betulae, which penetrates as far as the cambial zone (especially in the aftermath zones of beech bark disease [see Dave Houston's article in J. For., 73(10), 1975]. I think that they usually look rougher and corkier than the bumps in John's photos but my experience of this insect has been limited to looking at photos and to two brief visits to the USA.
Kind regards,
David
-----Original Message-----
From: rg70200-forpath-bounces(a)lists.iufro.org<mailto:rg70200-forpath-bounces@lists.iufro.org> [mailto:rg70200-forpath-bounces@lists.iufro.org]On Behalf Of Bonello, Pierluigi
Sent: 28 January 2013 18:17
To: forpath
Subject: [IUFRO RG 7.02 FORPATH] FW: Bumps on Beech
Dear colleagues,
I received these photos from one of my forest pathology students and I must admit I've never seen these things before. Can anyone help?
Thanks!
Enrico
Pierluigi (Enrico) Bonello, Professor
Dept. of Plant Pathology
The Ohio State University
Tel: (614) 688-5401
http://plantpath.osu.edu/bonello - http://esgp.osu.edu/ - http://cmib.osu.edu - http://caps.osu.edu
Would you like to support my program to foster research on woody plant health with a tax-deductible charitable donation? Click here!
From: Diana Saintignon <saintignon.1(a)buckeyemail.osu.edu<mailto:saintignon.1@buckeyemail.osu.edu>>
Date: Monday, January 28, 2013 12:41 PM
To: "Showalter, David N." <showalter.53(a)osu.edu<mailto:showalter.53@osu.edu>>, Pierluigi Bonello <bonello.2(a)osu.edu<mailto:bonello.2@osu.edu>>, Dan Herms <herms.2(a)osu.edu<mailto:herms.2@osu.edu>>
Subject: Bumps on Beech
While I was at Harvard I found this beech tree with some interesting wart-like mounds on its bark. Is this normal for some beeches, or could it potentially be a paper topic? Do you know what it is?
Thanks!
-Diana
This electronic message contains information generated by the USDA solely for the intended recipients. Any unauthorized interception of this message or the use or disclosure of the information it contains may violate the law and subject the violator to civil or criminal penalties. If you believe you have received this message in error, please notify the sender and delete the email immediately.
Dear Colleagues,
The January 2013 Division 7.02.00 Newsletter (Newsletter No. 1/2013) has been posted on the IUFRO website and is accessible via this link:
http://www.iufro.org/science/divisions/division-7/70000/70200/newsletters/
The first newsletter of 2013 includes articles on the 2014 World Congress, summaries of the meetings of Working Parties 7.02.09 and 7.02.07, a detailed announcement of the forest pathology content of the upcoming International Congress of Plant Pathology in China, as well as a list of upcoming IUFRO and other forest pathology meetings.
Jolanda and I would like to put together another newsletter in July / August of 2013 and we welcome contributions from the forest pathology community.
All the best, Tod
Tod Ramsfield, PhD
Research Scientist Forest Pathology | Chercheur, Pathologie forestière
Natural Resources Canada | Ressources naturelles Canada
Canadian Forest Service | Service canadien des forêts
Northern Forestry Centre | Centre de foresterie du nord
5320 122 Street
Edmonton, Alberta T6H 3S5
Canada
Tel : (780) 435 - 7394 Fax : (780) 435 - 7359
Email : Tod.Ramsfield(a)nrcan-rncan.gc.ca
My thanks to Guy Bussières at Université Laval, in Québec City for directing me to a 2012 paper by Colin et al. (Annals of Botany 110: 995-1005) which describes these bumps as a form of epicormic growth they called spheroblasts, "Isolated buds progressively engulfed in a small ball of wood generated from the base of the bud on the external side".
John A. McLaughlin, PhD
Forest Research Pathologist
Ontario Forest Research Institute
1235 Queen St. E.
Sault Ste. Marie, ON
Canada
P6A 2E5
tel: +1 705-946-7419
cell: 705-542-2851
John.McLaughlin(a)ontario.ca<mailto:John.McLaughlin@ontario.ca>
http://ontario.ca/ofri
Dear Enrico,
I often see similar bumps on European beech and have
identified them as sphaeroblasts, which are thought to develop from
dormant buds. In place of a shoot, a ball of wood develops, encased in
bark. A sphaeroblast can be easily detached with a mallet etc., since
its woody connection to the stem is very narrow. The large sphaeroblast
in the attached picture shows an arrow pointing towards the woody
connection on the proximal side. Some of the bark has been pared away
with a knife to expose this connection. The picture also shows wood
exposed on the proximal side (with partial occlusion), perhaps because
of an old injury or as a result of bark dieback. Similar canker-like
areas can be seen on the bumps in John McLaughlin's photos but I doubt
whether these bumps are sphaeroblasts, since their close alignment is
unlikely to correspond with the positions of dormant buds.
Small bumps
on American beech can also be induced by the scale insect Xylococculus
betulae, which penetrates as far as the cambial zone (especially in the
aftermath zones of beech bark disease [see Dave Houston's article in J.
For., 73(10), 1975]. I think that they usually look rougher and corkier
than the bumps in John's photos but my experience of this insect has
been limited to looking at photos and to two brief visits to the
USA.
Kind regards,
David
-----Original Message-----
From:
rg70200-forpath-bounces(a)lists.iufro.org
[mailto:rg70200-forpath-bounces@lists.iufro.org]On Behalf Of Bonello,
Pierluigi
Sent: 28 January 2013 18:17
To: forpath
Subject: [IUFRO RG
7.02 FORPATH] FW: Bumps on Beech
Dear colleagues,
I received these
photos from one of my forest pathology students and I must admit I've
never seen these things before. Can anyone
help?
Thanks!
Enrico
Pierluigi (Enrico) Bonello, Professor
Dept. of
Plant Pathology
The Ohio State University
Tel: (614)
688-5401
http://plantpath.osu.edu/bonello - http://esgp.osu.edu/ -
http://cmib.osu.edu - http://caps.osu.edu
Would you like to support my
program to foster research on woody plant health with a tax-deductible
charitable donation? Click here!
From: Diana Saintignon
<saintignon.1(a)buckeyemail.osu.edu>
Date: Monday, January 28, 2013 12:41
PM
To: "Showalter, David N." <showalter.53(a)osu.edu>, Pierluigi Bonello
<bonello.2(a)osu.edu>, Dan Herms <herms.2(a)osu.edu>
Subject: Bumps on
Beech
While I was at Harvard I found this beech tree with some
interesting wart-like mounds on its bark. Is this normal for some
beeches, or could it potentially be a paper topic? Do you know what it
is?
Thanks!
-Diana
Dear all,
Please don't forget to send your abstract for the scientific workshop on "Vulnerability and Risk Management in Planted Forests" to be held from 16-18 May 2013 in Bordeaux, France. The deadline for abstract submission is 31 January.
The workshop will cover a range of topics including vulnerability of exotic tree plantations to various disturbance issues, susceptibility of tree monocultures, exposure of planted forests to invasive pests, development of integrated risk analyses and management systems adapted to plantation forests.
Abstracts for oral or poster presentations can be submitted online until 31 January 2013 at:
http://www.efiatlantic.efi.int/portal/2013_icpf/abstract_submission/
Registration is now open at:
http://www.efiatlantic.efi.int/portal/2013_icpf/registration/
Apologies for cross-posting.
We look forward to seeing you in Bordeaux.
Hervé Jactel
Email: Herve.Jactel(a)pierroton.inra.fr
________________________________
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Scion does not accept responsibility for anything in this e-mail which is not provided in the course of Scion's usual business or for any computer virus, data corruption, interference or delay arising from this e-mail.
Dear Colleagues:
On behalf of the Scientific and Organizing Committees for the conference “Vegetation Response to Climate Change and Air Pollution – Unifying Evidence and Research across Northern and Southern Hemisphere” organized by the IUFRO Research Group 7.01. “Impacts of Air Pollution and Climate Change on Forest Ecosystems” we invite scientists, managers and decision makers interested in the topic of the conference to visit the revised Website: <http://www.iufro2013.ufop.br/> http://www.iufro2013.ufop.br/.
Pre-registration and abstract submission will start on 1 February 2013. For all other deadlines, please see: http://www.iufro2013.ufop.br/index.php/2012-10-15-13-45-25/deadlines.
Please note that a location of the conference has been changed from Rio de Janeiro to Ilhéus in Bahia, Brazil.
We are looking forward to welcoming you in Illheus!
Andrzej Bytnerowicz
===========================
Dr. Andrzej Bytnerowicz
Senior Scientist
USDA Forest Service
Pacific Southwest Research Station
4955 Canyon Crest Drive
Riverside, CA 92507, USA
tel. 951-680-1562
Upcoming event of IUFRO Unit 7.02.04 viruses and phytoplasma
http://dpg.phytomedizin.org/de/plant-protection-and-plant-health-in-europe/
Topic: Virus and phytoplasma diseases of forest and
urban trees
Date: on Wedneday, 29 th of May, a Satellite
meeting
Frame: within the 5th International Symposium on Plant
Protection and Plant Health in Europe
Organizing partners: jointly organised by DPG, ALVA, JKI, IAPPS, IUBS and
COST
Coordiantor: Prof. Dr. Carmen Buettner
Humboldt-Universität zu Berlin
Devision Phytomedicine
Faculty for Agriculture and Horticulture
Deadline: End: 28.02.2013 (The deadline of submission and
upload of proposals for contributions (Title, authors and Abstracts) was
extented to 28.02.2013)
Registration:
<http://dpg.phytomedizin.org/de/plant-protection-and-plant-health-in-europe/
the-symposium/fees/>
http://dpg.phytomedizin.org/de/plant-protection-and-plant-health-in-europe/t
he-symposium/fees/
Dear Colleagues,
we invite you to take part in the second scientific satellite meeting of
Unit 7.02.04 on viruses and phytoplasma of forest and urban trees in May
29th within the 5th International Symposium on plant protection and plant
health in Europe May 27 29, 2013 in Berlin, Germany and participate in the
sessions and round tables.
The focuse will lay on all different issues on virus and phytoplasma
diseases of forest and urban trees. The topic of the meeting will bring
innovative developments, methods and ideas, new viruses and risk assessment
and management together.
Any presentation on the following keywords is welcome:
· monitoring, visual survey,
· detection tools, detection steps,
· known pathogens, unknown agents,
· risk assessment and control
· epidemiological and ecological evidence,pathogen transmission,
· economic importance, seed quality, seedling quality, wood quality
· certification of seeds and plants
Participants will have the option to take part in the 5th International
Symposium on Plant Protection and Plant Health in Europe under reduced
participation fee. The topic of the symposium will be « Endophytes for plant
protection: the state of the art
Location: This three-day symposium will be held at the traditional building
of the Faculty of Agriculture and Horticulture, Lentzeallee
55, 14195 Berlin (Dahlem), Germany.
Accommodation: Berlin offers a large number of hotels. For special offers
please see the Symposium website.
Discovering Berlin: A number of opportunities will be available for you to
explore the German capital on your own (see symposium website).
Hi all,
I am forwarding a message from Hervé Jactel (Deputy Coordinator 7.03, Forest Entomology):
The next International Congress on Planted Forest (ICPF 2013) will take place in May 2013, in Estoril, Portugal. A satellite scientific workshop on "Vulnerability and Risk Management in Planted Forests" will be held from 16-18 May 2013 in Bordeaux, France. IUFRO Divisions 7 (Forest Health) and 8 (Environment) co-sponsor this event.
The workshop will cover a range of topics including vulnerability of exotic tree plantations to various disturbance issues, susceptibility of tree monocultures, exposure of planted forest to invasive pests, development of integrated risk analyses and management systems adapted to plantation forests.
Registration is now open at:
http://www.efiatlantic.efi.int/portal/2013_icpf/registration/
Abstracts can be submitted online until 31 January 2013 at:
http://www.efiatlantic.efi.int/portal/2013_icpf/abstract_submission/
Background
Globally, planted forests represent about 7 percent of the world's total forest area, with an increasing area in all continents (FAO, 2011). It is forecasted that by 2050 the majority of the wood and fibre supply will originate from planted forests. Planted forests are commonly composed of pure, even-aged stands of fast-growing tree species. They are among the most productive forest ecosystems and planted forests are expected to play an important role in bio-based economies as well as contributing to climate change mitigation by way of carbon sequestration or bioenergy production. However, because planted forests are commonly managed as monocultures, often of exotic tree species, they may be prone to pest damage. Evidence is accumulating that suggests a positive relationship between tree species diversity and forest resistance to pests and pathogens, and alien tree species may be more exposed to pest species due to a lack of coevolution. It remains also uncertain whether the management of forests as pure and even-aged stands might increase the risk of wind and fire damage. There is therefore an urgent need to better evaluate the biotic and abiotic risks in planted forests and to decipher the underlying mechanisms of their specific susceptibility. This information will help foresters to adapt the design and management of planted forests in the face of global change uncertainties.
The members of scientific committee are Hervé Jactel (IUFRO Division 7, email Herve.Jactel(a)pierroton.inra.fr) Jean-Michel Carnus (Coordinator, IUFRO Division 8), and Eckehard Brockerhoff (Coordinator, IUFRO Division 7).
The organizing committee is made up of representatives of IUFRO, the European Forest Institute (EFI), the French National Institute of Agronomical Research (INRA), the French Ministry of Agriculture, Food and Forestry (MAAF), the Regional Forest Owner Centre, the Aquitaine Regional Council, the Regional Association for Forest Fire Prevention.
________________________________
This e-mail and any attachments may contain information which is confidential or subject to copyright. If you receive this e-mail in error, please delete it.
Scion does not accept responsibility for anything in this e-mail which is not provided in the course of Scion's usual business or for any computer virus, data corruption, interference or delay arising from this e-mail.
Sesión IUFROLAT "Amenazas a la Salud Forestal"
El Tercer Congreso IUFRO Latinoamericano (IUFROLAT) a realizarse en San José, Costa Rica del 12 a 15 de Junio del 2013.
La división 7 del IUFRO invita contribuciones a la sesión "Amenazas a la Salud Forestal - Plagas e Enfermedades Forestales, Invasiones Biológicas, la Contaminación del Aire y Cambio Climático".
La fecha limite para la entrega de resúmenes (presentación oral o afiches): 31 de Diciembre del 2012. Para la entrega de resúmenes, registro e información del congreso, consultar a http://web.catie.ac.cr/iufrolat/IufroLat_ing.htm.
Si le interesa contribuir a la sesión, por favor informar a los organizadores Karl Thunes (CATIE/Instituto Noruego para Bosque y Paisaje, correo electrónico thk(a)skogoglandskap.no<mailto:thk@skogoglandskap.no>) y Ecki Brockerhoff (IUFRO / Scion, correo electrónico eckehard.brockerhoff(a)scionresearch.com<mailto:eckehard.brockerhoff@scionresearch.com>).
Como parte de las actividades del congreso, se realizará una gira sobre salud forestal, la participación es voluntaria. La gira será de tres días y está bajo responsabilidad de los organizadores.
El congreso IUFROLAT 2013 es una colaboración entre The International Union of Forest Research Organizations (IUFRO) y Centro Agronómico Tropical de Investigación y Enseñanza (CATIE) en asociación con La Red Iberoamericana de Bosques Modelo (RIABM), FAO y varios miembros IUFRO de la región.
Ayuda financiera para participantes de América Latina está disponible en http://web.catie.ac.cr/iufrolat/IufroLat_becas_ing.htm.
El comité responsable para la sesión "Amenazas a la Salud Forestal" esta integrado por: Karl Thunes, Ecki Brockerhoff, Andrzej Bytnerowicz, Jolanda Roux, Sandy Liebhold, y Juan Corley.
________________________________
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Scion does not accept responsibility for anything in this e-mail which is not provided in the course of Scion's usual business or for any computer virus, data corruption, interference or delay arising from this e-mail.
