Cornell University Plant Disease Diagnostic Clinic. Diagnostic Review Report Confidence (to genus) Host. Diagnosis. Not Detected Suspected

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1 Time Period Report for September 11 th through September 24 th 2018 Allium sativum Garlic Botrytis blight (Botrytis ) Allium sativum Garlic Skin blotch (Alternaria embellisia) Allium sativum Garlic Blue mold rot (Penicillium ) Allium sativum Garlic Bulb mite (Rhizoglyphus ) Allium sativum Garlic Stem and bulb nematode (Ditylenchus dipsaci) Buxus Boxwood Boxwood Macrophoma leaf spot (Dothiorella candollei) Buxus Boxwood Boxwood Volutella blight; Canker (Volutella buxi) Buxus Boxwood Boxwood blight; Leaf and stem blight (Calonectria pseudonaviculata) Buxus Boxwood Leaf blight (Volutella buxi) Buxus Boxwood Unknown abiotic disorder (Abiotic disorder) Buxus Boxwood Insect damage (Unidentified Insect) Buxus Boxwood Non-pathogenic; Saprophyte (Secondary Agents; Saprophytes; Unspecif.) hornbeam leafminer (Stigmella microtheriella) The diagnosis was derived using approved molecular technologies, serological testing and/or morphological observations which allowed for the confirmation of the organism to Genus, species and/or race or -The sample was submitted as a suspect sample or as part of survey project. The pathogen was not detected on this sample at this time using approved molecular technologies, serological testing and/or - Diagnostic symptoms of the pathogen were present but evidence of the pathogen could not be confirmed at this time. This term may also be used at the species level if confirmations cannot be made. This term - Although a suitable sample was received, a reliable result could not be achieved. For example, the test kit may have not worked correctly and there was no sample material remaining to perform the test again.

2 Unspecified pathology (Cytospora ) Carpinus Anthracnose (Monostichella robergei) Cercis canadensis Eastern Redbud Additional sample requested (Identification Analysis) Cercis canadensis Eastern Redbud Verticillium wilt (Verticillium ) Anthracnose (Colletotrichum ) Environmental stress; Problem (Abiotic disorder) Spider mites (Family Tetranychidae) Fagus grandifolia American Beech Intumescence (Abiotic disorder) Fagus grandifolia American Beech Hamamelis Hamamelis Witchhazel Leaf scorch (Abiotic disorder) Witchhazel Non-pathogenic; Saprophyte (Secondary Agents; Saprophytes; Unspecif.) The diagnosis was derived using approved molecular technologies, serological testing and/or morphological observations which allowed for the confirmation of the organism to Genus, species and/or race or -The sample was submitted as a suspect sample or as part of survey project. The pathogen was not detected on this sample at this time using approved molecular technologies, serological testing and/or - Diagnostic symptoms of the pathogen were present but evidence of the pathogen could not be confirmed at this time. This term may also be used at the species level if confirmations cannot be made. This term - Although a suitable sample was received, a reliable result could not be achieved. For example, the test kit may have not worked correctly and there was no sample material remaining to perform the test again.

3 Humulus lupulus Hops Alternaria cone disorder (Alternaria alternata) Humulus lupulus Hops Hop downy mildew (Pseudoperonospora humuli) Humulus lupulus Hops Black mold; Mildew (Alternaria alternata) Humulus lupulus Hops Powdery mildew (Podosphaera macularis) Larix decidua Larch Larch needle cast; (Mycosphaerella laricina) Malus domestica Domestic Apple Honeycrisp chlorosis (Abiotic disorder) Malus domestica Domestic Apple Non-pathogenic; Saprophyte (Secondary Agents; Saprophytes; Unspecif.) Malus domestica Domestic Apple Root damage (Abiotic disorder) Malus domestica Domestic Apple Unknown abiotic disorder (Abiotic disorder) Ostrya virginiana Hophornbeam Additional sample requested (Identification Analysis) Ostrya virginiana Hophornbeam High soil moisture (Abiotic disorder) Cherry-laurel Additional sample requested (Identification Analysis) Cherry-laurel High soil moisture (Abiotic disorder) The diagnosis was derived using approved molecular technologies, serological testing and/or morphological observations which allowed for the confirmation of the organism to Genus, species and/or race or -The sample was submitted as a suspect sample or as part of survey project. The pathogen was not detected on this sample at this time using approved molecular technologies, serological testing and/or - Diagnostic symptoms of the pathogen were present but evidence of the pathogen could not be confirmed at this time. This term may also be used at the species level if confirmations cannot be made. This term - Although a suitable sample was received, a reliable result could not be achieved. For example, the test kit may have not worked correctly and there was no sample material remaining to perform the test again.

4 Cherry-laurel Shothole (Various Pathogens) Aphids; Plant lice (Family Aphididae) Spider mites (Family Tetranychidae) Quercus palustris Pin Oak High ph damage (Abiotic disorder) Quercus palustris Pin Oak Leaf spot (Tubakia dryina) Quercus palustris Pin Oak Bacterial leaf scorch (Xylella fastidiosa) Quercus robur English Oak Bacterial leaf scorch (Xylella fastidiosa) Quercus rubra Northern Red oak Bacterial leaf scorch (Xylella fastidiosa) Quercus red Red Oaks Bacterial leaf scorch (Xylella fastidiosa) Reseda luteola Dyer's Rocket Cercospora leaf spot (Cercospora ) The diagnosis was derived using approved molecular technologies, serological testing and/or morphological observations which allowed for the confirmation of the organism to Genus, species and/or race or -The sample was submitted as a suspect sample or as part of survey project. The pathogen was not detected on this sample at this time using approved molecular technologies, serological testing and/or - Diagnostic symptoms of the pathogen were present but evidence of the pathogen could not be confirmed at this time. This term may also be used at the species level if confirmations cannot be made. This term - Although a suitable sample was received, a reliable result could not be achieved. For example, the test kit may have not worked correctly and there was no sample material remaining to perform the test again.

5 Solanum tuberosum Potato Potato black leg; Stem rot (Pectobacterium sp.) Thuja Arborvitae Pestalotiopsis dieback (Pestalotiopsis funerea) Thuja Arborvitae Unknown abiotic disorder (Abiotic disorder) Vitis vinifera Grape Tobacco ringspot (TRSV) (Nepovirus Tobacco Ringspot Virus) The diagnosis was derived using approved molecular technologies, serological testing and/or morphological observations which allowed for the confirmation of the organism to Genus, species and/or race or -The sample was submitted as a suspect sample or as part of survey project. The pathogen was not detected on this sample at this time using approved molecular technologies, serological testing and/or - Diagnostic symptoms of the pathogen were present but evidence of the pathogen could not be confirmed at this time. This term may also be used at the species level if confirmations cannot be made. This term - Although a suitable sample was received, a reliable result could not be achieved. For example, the test kit may have not worked correctly and there was no sample material remaining to perform the test again.