ISSUE 5   June 11, 2009

PLANT DIAGNOSTIC LAB PERIODIC REPORT

A total of 164 samples were processed by the NDSU Plant Diagnostic Lab from May 27 through June 10, 2009. The table below summarizes samples received for routine diagnoses only during this time period (research samples and those submitted for seed health or phytosanitary testing are omitted):

State-County

Host

Diagnosis

MN-Clay

Freeman's Maple (Acer freemanii)

Abiotic disorder - frost crack, suspected

MN-Clay

Plant ID Request

Honeysuckle, Lonicera xylosteoides "Claveys Dwarf", confirmed

MN-Clay

Plant ID Request

Tatarian Honeysuckle, Lonicera tatarica, confirmed

MN-Clay

Plant ID Request

Honeysuckle, Lonicera xylosteum "Emerald Mound", confirmed

MN-Olmsted

Corn (Zea mays)

Abiotic disorder - chemical injury, suspected

ND-Bowman

Crested Wheatgrass (Agropyron cristatum)

Black grass bug, Labops hesperius, confirmed

ND-Burleigh

Apple (Malus domestica)

Oystershell scale, Lepidosaphes ulmi, confirmed

ND-Burleigh

Blue Spruce (Picea pungens)

Abiotic disorder - Growth regulator-type herbicide injury, suspected

ND-Burleigh

Blue Spruce (Picea pungens)

Abiotic disorder - transplant shock, suspected

ND-Cass

Barley (Hordeum species)

Abiotic disorder - Chemical injury, suspected

ND-Cass

Dandelion (Taraxacum officinale)

Dandelion Leaf rust, Puccinia species, suspected

ND-Grand Forks

Plant ID Request

Insufficient sample

ND-Hettinger

Choke Cherry (Prunus virginiana)

Brown rot, Monilinia fructicola, confirmed

ND-Hettinger

Plant ID Request

Garlic mustard, Alliaria petiolata, suspected

ND-LaMoure

Plant ID Request

Obedient plant, Physotegia virginiana, inconclusive

ND-Logan

Wheat - winter (Triticum aestivum)

Wheat streak mosaic virus (WSMV), confirmed

ND-McHenry

Insect ID Request

Red Flour Beetle, Tribolium castaneum, confirmed

ND-Pembina

Plant ID Request

Insufficient sample

ND-Ramsey

Spruce (Picea species)

Abiotic disorder - Insufficient light, suspected

ND-Ransom

Wheat - winter (Triticum aestivum)

High Plains Virus (HPV), confirmed

ND-Ransom

Wheat - winter (Triticum aestivum)

Wheat streak mosaic virus (WSMV), confirmed

ND-Ransom

Wheat - winter (Triticum aestivum)

Wheat streak mosaic virus (WSMV), confirmed

ND-Ransom

Wheat - winter (Triticum aestivum)

Wheat streak mosaic virus (WSMV), confirmed

ND-Slope

Spruce (Picea species)

Abiotic disorder - trunk girdling, suspected

Kasia Kinzer
NDSU Plant Diagnostician
701-231-7854
ndsu.pdl@ndsu.edu
http://www.ag.ndsu.nodak.edu/diaglab/


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