Re: [IUFRO RG 7.02 FORPATH] Bumps on Beech

Actually this is not a rare event. I have seen this many many times in beech forests both in Europe and the US. The right answer is in botany/ plant physiology books. This is a form of epicormic growth. I was curious about this myself too and, being pathologist, opened up several such "bumps" to find whats happening. Never found any insect involvement. Yilmaz Balci Assistant Professor University of Maryland Department of Plant Science and Landscape Architecture 2114 Plant Sciences College Park, MD phone: 301 405 9744 email: ybalci(a)umd.edu ________________________________ From: rg70200-forpath-bounces(a)lists.iufro.org [rg70200-forpath-bounces(a)lists.iufro.org] on behalf of Mmbaga, Margaret [mmmbaga(a)Tnstate.edu] Sent: Wednesday, January 30, 2013 12:15 PM To: McLaughlin, John (MNR); Bonello, Pierluigi; forpath Subject: Re: [IUFRO RG 7.02 FORPATH] Bumps on Beech Our Entomologist think they could be from an insect. A good way to possible check would be to cut them open and see if there are insect adults or larvae inside the structures. One of these photo images indicated it was Patagonia gall, which is apparently common on southern beech trees. This one website (http://www.news.wisc.edu/newsphotos/lagerYeast11.html) suggests it maybe a yeast and not insect. Again, if insect in origin, I would think there would be some evidence of insects (eggs, larvae, or adults) inside the galls. Hope this helps. Margaret T. Mmbaga, PhD. Research Professor, Tennessee State University, College of Agriculture, Otis Floyd Research Center 472 Cadillac Lane McMinnville TN 37110 USA Tel: (931) 815-5143 Fax: (931) 668-3134 Email: mmmbaga(a)tnstate.edu ________________________________ From: rg70200-forpath-bounces(a)lists.iufro.org [rg70200-forpath-bounces(a)lists.iufro.org] On Behalf Of McLaughlin, John (MNR) [john.mclaughlin(a)ontario.ca] Sent: Tuesday, January 29, 2013 7:56 AM To: Bonello, Pierluigi; forpath Subject: Re: [IUFRO RG 7.02 FORPATH] Bumps on Beech Hello Enrico, Last year I found somewhat similar growths on beech here in Ontario. I had never noticed such things before so I took some photos. I suspected that they were responses to some kind of insect attack, but I did not pursue it any further, e.g. by dissections or isolations. I wonder of these share the same cause as the ones you posted? Best regards, John 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@ontario.ca<mailto:John.McLaughlin@ontario.ca> http://ontario.ca/ofri From: rg70200-forpath-bounces(a)lists.iufro.org [mailto:rg70200-forpath-bounces@lists.iufro.org] On Behalf Of Bonello, Pierluigi Sent: 28-Jan-13 13:17 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://esgp.osu.edu/>/ - http://cmib.osu.edu<http://cmib.osu.edu/> - http://caps.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? C<https://www.giveto.osu.edu/igive/onlinegiving/search_results.aspx?fund… here<https://www.giveto.osu.edu/igive/onlinegiving/search_results.aspx?f… From: Diana Saintignon <saintignon.1@buckeyemail.osu.edu<mailto:saintignon.1@buckeyemail.osu.edu>> Date: Monday, January 28, 2013 12:41 PM To: "Showalter, David N." <showalter.53@osu.edu<mailto:showalter.53@osu.edu>>, Pierluigi Bonello <bonello.2@osu.edu<mailto:bonello.2@osu.edu>>, Dan Herms <herms.2@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