Arborists Needed to Send in Samples

Leaf scorch samples are needed from Michigan arborists. We want any scorch on any host so please don’t try to discriminate between Bacterial or Environmental scorch—we work on that in the lab. Mulberry is a good host we have need of samples from but we still need lots of oaks (red and white). We just found positive Swamp oaks this last year.

I will supply a tyvek envelop with postage paid. On the back of the envelope is the information listed that we seek. You may write the information on the back of the envelop with permanent marker, carpenter pencil, etc. We will always take less information regardless [GPS is not necessary, as cross streets will do, accurate species ID not crucial, etc.].

The information needed is: urban, rural, or forest; tree species or common name; contact information; location information – state, country, city, street address; CPS Coordinates WGS 84: (or indicate datum & format used) size class (dbh): sapling <5”, pole 5-11”, large > 11”; crown symptoms: percent of foliage affected by scorch symptoms; percent dieback: low<5, moderate 5-20, high> 20.

Information on Bacterial Leaf Scorch and information specifically on our project is at: http://fhm.fs.fed.us/sp/bls/bls.shtm and particularly at http://fhm.fs.fed.us/sp/bls/bls_handout.pdf

You can always send it in yourself, if you find that more convenient. Mail to either address below.

Thank you.

Gerard C Adams, Assoc Professor Dept Plant Pathology and Plant Biology
107 Integrated Plant Systems Center
Michigan State University
East Lansing, MI 48824-1311

DR. GERRY ADAMS

MICHIGAN STATE UNIVERSITY

268 PLANT BIOLOGY BUILDING

EAST LANSING MI 48824-9902

Hosts represented in the assayed leaf samples showing scorch (From last year’s study)

BLS Positive hosts are in Bold fonts

Acer ginnala (Amur maple) 2, Acer negundo (Box elder) 2, Acer platanoides (Norway maple) 3, Acer rubrum (Red maple) 1, Acer saccharinum (Silver maple) 1, Acer saccharum (Sugar maple) 1, Acer tataricum (Tatarian maple) 1, Acer sp. 2, Aesculus glabra (Ohio Buckeye) 3, Aesculus hippocastanum (Buckeye Horsechestnut) 4, Cercis occidentalis (Western redbud) 1, Fraxinus americana (White ash) 1, Fraxinus pennsylvanica (Green ash) 9, Juglans nigra (Black walnut) 1, Malus spp. (Flowering crabapple) 1, Morus rubra (Mulberry) 3, Parthenocissus quinquefolia (Virginia creeper) 1, Populus tremula ‘Erecta’ (Columnar poplar) 2, Populus tremuloides (Quaking aspen) 2, Prunus virginiana (Chokecherry) 1, Pyrus ussuriensis (Prairie gem) 3, Quercus alba (White oak) 1, Quercus bicolor (Swamp oak) 2, Quercus imbricaria (Shingle oak) 1, Quercus macrocarpa (Bur oak) 14, Quercus palustris (Pin oak) 9, hybrid Quercus rober ‘Fastigiata’ x Q. bicolor (‘Regal Prince’) 1, Quercus rubra (Red oak) 77, Quercus velutina (Black oak) 3, Syringa villosa (Late or Villous lilac) 1, Syringa vulgaris (Common lilac) 1, Tilia americana (American linden) 8, Ulmus americana (American elm) 5, Ulmus davidiana var. japonica (Japanese elm) 1, Vitis sp. 1

States with positive samples of BLS = IL, IN, KS, MO, WI