ISSUE 8   June 22, 2006

Below is a summary of samples diagnosed in the past week (research samples and seed health testing results are not included):

Host

Diagnosis

Taxonomic name

County

Alfalfa

Herbicide Injury; Exposure

Abiotic pathology

Walsh

Apple

Black Rot

Botryosphaeria obtusa

Cass

Asparagus

Animal Damage

Abiotic pathology

Becker

Barley

Drought Stress Damage

Abiotic pathology

Richland

Barley

High Temperature Damage

Abiotic pathology

Richland

Black Ash

Cottony Ash Psyllid

Psyllopsis discrepans

Clay

Bur Oak

Oak Anthracnose

Gnomonia quercina

Cass

Canola

Environmental Stress; Problem

Abiotic pathology

Walsh

Chokecherry

Peach Leaf Curl

Taphrina deformans

Stark

Corn

Environmental Stress; Problem

Abiotic pathology

Richland

Corn

Herbicide Injury; Exposure

Abiotic pathology

Unknown

Cotoneaster

Oystershell Scale

Lepidosaphes ulmi

Clay

Crabapple

Mechanical Damage

Abiotic pathology

Cass

Grape

Grape Black Rot; Foliage Dis.

Guignardia bidwellii!ph'ctina

Becker

Grass (pasture)

Spittle Bug

Aphrodes sp.

Bowman

Honeylocust

Cottony Maple Scale

Pulvinaria innumerabilis

Cass

Horseraddish

Red Turnip Beetle

Entomoscelis americana

Clearwater

Juniper

Abiotic cause; undetermined

Abiotic pathology

Richland

Maple

Iron Deficiency

Abiotic pathology

Cass

Maple

Maple Anthracnose

Gloeosporium apocryptum

Dickey

Maple

Phyllosticta Leaf Spot

Phyllosticta sp.

Grand Forks

Pine

Diplodia Tip Blight

Sphaeropsis sapinea

Cass

Pine

Salt Damage

Abiotic pathology

Bowman

Siberian pea shrub

Insect Damage

Abiotic pathology

Cass

Soybean

Growth Regulator Effect

Abiotic pathology

Cass

Spring Wheat

Wheat Streak Mosaic Virus

Virus; rhymovirus: Potyviridae

Bottineau, Emmons, McIntosh, Sargent

Spruce

Abiotic cause; undetermined

Abiotic pathology

Wells

Spruce

Chemical injury

Abiotic pathology

Mcintosh

Spruce

Environmental Stress; Problem

Abiotic pathology

Bowman

Spruce

Growth Regulator Effect

Abiotic pathology

Golden Valley

Spruce

Salt Damage

Abiotic pathology

Bowman

Sugarbeet

Aphanomyces damping off

Aphanomyces cochlioides

Cass

Sugarbeet

Beet Water Rot; Seedling Dis.

Aphanomyces cochlioides

Clay

Sugarbeet

Fusarium

Fusarium oxysporum probable

Cass

Sugarbeet

Fusarium Blight

Fusarium sp.

Cass

Sugarbeet

Fusarium Root Rot

Fusarium sp.

Cass

Sugarbeet

Herbicide Injury; Exposure

Abiotic pathology

Cass

Sugarbeet

Pythium Root Rot

Pythium sp.

Cass

Sugarbeet

Rhizoctonia Damping Off

Rhizoctonia sp.

Cass

Sunflower

Cultural/Environmental Problem

Abiotic pathology

Emmons

Sunflower

Environmental Stress; Problem

Abiotic pathology

Cass

Sunflower

Herbicide Drift Or Carryover

Abiotic pathology

Cass

Sunflower

Wireworm

Elateridae

Polk

Tomato

Growth Regulator Effect

Abiotic pathology

Cass

Kasia Kinzer
NDSU Plant Diagnostic Lab
http://www.ag.ndsu.nodak.edu/diaglab
diaglab@ndsuext.nodak.edu
701-231-7854
206 Waldron Hall, PO Box 5012
Fargo, ND  58105


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