Specimen
Armillaria root rot
Specimen
Adult Gypsy Moths
Specimen
Cedar quince rust
Specimen
Yellow-necked caterpillar (Datona ministra) on Crataegus cordata (Washington hawthorn)August 6 1997
Beckett Jr., John L.
Specimen
Yellow-necked caterpillar (Datana ministra) on Betula davurica Pall. (Dahurian birch)August 6 1997
Danielson, Donna
Specimen
X-disease (Unnamed phytoplasma) on Prunus virginiana L. (choke cherry)August 1 1997
Jacobs, Karel
Specimen
Woolly apple aphid damage (Eriosoma lanigerum) on Crataegus kansuensis Wils. (Gansu hawthorn)June 25 1997
Danielson, Donna
Specimen
Witches’ broom of hackberry (Sphaerotheca phytotophila & Eriophyes celtis) on Celtis occidentalis L. (hackberry)August 28 1997
Danielson, Donna
Specimen
Witches' broom (Unknown) on Pinus strobus L. (eastern white pine)July 30 1997
Danielson, Donna
Specimen
White pine weevil (Phyllactinia guttata) on Pinus strobus L. (eastern white pine)July 22 2002
Danielson, Donna
Specimen
White pine blister rust (Cronartium ribicola) on Pinus strobus L. (eastern white pine)September 18 1998
Jacobs, Karel
Specimen
Verticillium wilt (Verticillium albo-atrum) on Cotinus obovatus Raf. (American smoke tree)September 4 1996
Specimen
Verticillium wilt (Verticillium albo-atrum) on Cercis canadensis L. (redbud) and C. chinensis (Redbud/Chinese Redbud)1998
Jacobs, Karel, Milauskas, Susan
Specimen
Twomarked treehopper damage and egg coverings (Enchenopa binotata) on Ptelea trifoliata L. (wafer-ash)August 6 1997
Danielson, Donna
Specimen
Tobacco mosaic virus on Ribes fasciculatum var. chinense Maxim. (Chinese currant)June 4 1997
Danielson, Donna, Jacobs, Karel
Specimen
Thyronectria canker (Thyronectria austro-americana) on Gleditsia caspica Desf. (Caspian-locust)July 30 1998
Danielson, Donna