ISSUE 8   July 2, 2009

PERIODIC REPORT OF THE NDSU PLANT DIAGNOSTIC LAB

About 122 samples were processed in the past three weeks, and 48 of these were from county extension offices. Periodic reports are available on-line at http://www.ag.ndsu.nodak.edu/diaglab/reports.htm. The table below summarizes the routine diagnoses for the period June 10 - July 1, 2009 (research, phytosanitary, negative survey data, and seed health samples are not included):

State-County

Host

Diagnosis and Confidence Level

MN-Clay

Plant ID request

Common chickweed (Stellaria media) - confirmed

MN-Clay

Sugar Beet (Beta vulgaris altissima)

Nutrient Imbalance - suspected

MN-Clay

Sugar Beet (Beta vulgaris altissima)

Rhizoctonia Root Rot (Rhizoctonia solani) - confirmed (3)

MN-Polk

Raspberry (Rubus sp.)

Iron Deficiency - suspected

MN-Todd

Hosta (Hosta sp.)

Hosta Virus X (HVX) - confirmed

MN-Traverse

Spring Wheat (Triticum aestivum)

Unknown Abiotic Disorder - suspected

ND-Bowman

Durum Wheat (Triticum turgidum)

Wheat Streak Mosaic Virus (WSMV) - confirmed

ND-Bowman

Silver Maple (Acer saccharinum)

Growth Regulator Effect - suspected

ND-Bowman

Spring Wheat (Triticum aestivum)

Unidentified Insect

ND-Burleigh

Blue Spruce (Picea pungens)

Eriophyid Mites - confirmed

ND-Burleigh

Blue Spruce (Picea pungens)

Stigmina Needle Blight (Stigmina lautii) - confirmed

ND-Burleigh

Blue Spruce (Picea pungens)

Unknown Abiotic Disorder - suspected (2)

ND-Cass

American Cranberry bush (Viburnum trilobum)

Eriophyid Mites - confirmed (2)

ND-Cass

Engelmann Ivy (Parthenocissus quinquefolia)

Scab (Sphaceloma sp./spp.) - suspected

ND-Cass

Green Ash (Fraxinus pennsylvanica lanceolata)

Ash Anthracnose (Gnomoniella fraxini) - suspected

ND-Cass

Maple (Acer sp./spp.)

Maple Anthracnose (Aureobasidium apocryptum) - suspected

ND-Cass

Plum (Prunus sp.)

Environmental Stress - suspected

ND-Cass

Sugar Beet (Beta vulgaris altissima)

Rhizoctonia Root Rot (Rhizoctonia solani) - confirmed

ND-Dickey

Winter Wheat (Triticum aestivum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-Golden Valley

Durum Wheat (Triticum turgidum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-Golden Valley

Juniper (Juniperus spp.)

Environmental Stress - suspected

ND-Grand Forks

Winter Wheat (Triticum aestivum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-Kidder

Blue Spruce (Picea pungens)

Pine Needle Scale (Chionaspis pinifoliae) - confirmed

ND-Kidder

Winter Wheat (Triticum aestivum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-LaMoure

Winter Wheat (Triticum aestivum)

High Plains Virus (HPV) - confirmed

ND-LaMoure

Winter Wheat (Triticum aestivum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-Mchenry

Blue Spruce (Picea pungens)

Rhizosphaera Needle Cast (Rhizosphaera kalkhoffii) - confirmed

ND-Mchenry

Blue Spruce (Picea pungens)

Spider Mite Injury - suspected

ND-Mchenry

Canola (Brassica napus var. napus)

Unknown

ND-Morton

Juniper (Juniperus spp.)

Unknown Abiotic Disorder - suspected

ND-Morton

Quaking Aspen (Populus tremuloides)

Unknown Abiotic Disorder - suspected

ND-Mountrail

Spring Wheat (Triticum aestivum)

Wheat Streak Mosaic Virus (WSMV) - confirmed (2)

ND-Richland

Sugar Beet (Beta vulgaris altissima)

Aphanomyces root rot (Aphanomyces cochlioides) - confirmed

ND-Richland

Sugar Beet (Beta vulgaris altissima)

Fusarium Root Rot (Fusarium sp./spp.) - confirmed

ND-Richland

Sugar Beet (Beta vulgaris altissima)

Rhizoctonia Root Rot (Rhizoctonia solani) - confirmed (2)

ND-Sheridan

Blue Spruce (Picea pungens)

Environmental Stress - suspected

ND-Sheridan

Spring Wheat (Triticum aestivum)

Nitrogen Deficiency - suspected (2)

ND-Sheridan

Spring Wheat (Triticum aestivum)

Triticum Mosaic Virus (TriMV) - pending confirmation

ND-Towner

Plant ID request

Houndstongue (Cynoglossum officinale) - suspected

ND-Traill

Apple (Malus domestica)

Apple Black Rot (Physalospora obtusa) - suspected

ND-Traill

Apple (Malus domestica)

Branch Girdling- suspected

ND-Walsh

Bur Oak (Quercus macrocarpa)

Oak Anthracnose (Apiognomonia errabunda) - suspected

ND-Walsh

Ponderosa Pine (Pinus ponderosa)

Mechanical Damage - suspected

ND-Ward

Rose (Rosa spp.)

Glyphosate Injury - suspected (2)

ND-Ward

Rose (Rosa spp.)

Phytoplasma - suspected (2)

ND-Wells

Spruce (Picea spp.)

Environmental Stress - suspected

SD-Dewey

Potato (Solanum tuberosum)

Growth Regulator Effect - suspected

Kasia Kinzer
NDSU Plant Diagnostician
NDSU.PDL@ndsu.edu


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