ISSUE 8   June 28, 2007

NDSU PLANT DIAGNOSTIC LAB UPDATE

A summary of samples diagnosed during the week of June 21-27 is shown below (periodic reports are also available online at http://www.ag.ndsu.nodak.edu/diaglab/reports.htm):

State

County

Host

Host (Taxonomic)

Diagnosis

Diagnosis (Taxonomic)

Confidence Level

MN

Pennington

Plant Id request

general

Tall Goldenrod

Solidago canadensis

Confirmed

MN

Pennington

Sunflower

Helianthus sp.

Chemical Injury

Abiotic disorder

Suspected

ND

Bowman

Crested Wheatgrass

Agropyron cristatum

Unknown

General

Inconclusive

ND

Burleigh

Spruce

Picea spp.

Spruce Spider Mite

Oligonychus ununguis

Confirmed

ND

Cass

Sugar Beet

Beta vulgaris altissima

Fusarium Yellows

Fusarium oxysporum

Confirmed

ND

Cass

Common Apple

Malus sylvestris

Apple Black Rot

Physalospora obtusa!sphaeropsis

Suspected

ND

Cass

Common Apple

Malus sylvestris

Unknown Abiotic Disorder

Abiotic disorder

Inconclusive

ND

Cass

Domestic Apple

Malus domestica

Apple Black Rot

Physalospora obtusa!sphaeropsis

Inconclusive

ND

Cass

Silver Maple

Acer saccharinum

Iron Deficiency

Abiotic disorder

Suspected

ND

Cass

Wheat

Triticum spp.

Barley Yellow Dwarf Strain 6

Barley Yellow Dwarf Virus (BYDV-RPV)

Suspected

ND

Cass

Fungus Id request

general

Unidentified fungus

Unidentified fungus

Confirmed

ND

Cass

Serviceberry

Amelanchier spp.

Entomosporium Leaf Spot

Entomosporium sp./spp.

Confirmed

ND

Emmons

Turfgrass

Turfgrass mixed sp.

Chemical; Environ. Injury

Abiotic disorder

Suspected

ND

Grand Forks

Soybean

Glycine max

Chemical; Environ. Injury

Abiotic disorder

Suspected

ND

Mcintosh

Wheat

Triticum spp.

Bacterial Stripe; Black Chaff

Xanthomonas campestris pv. translucens

Confirmed

ND

Ransom

Alfalfa

Medicago sativa

Spring Black Stem; Leaf Spot

Phoma medicaginis

Confirmed

ND

Ransom

Alfalfa

Medicago sativa

Alfalfa Weevil

Hypera postica

Confirmed

ND

Stark

Durum Wheat

Triticum turgidum

Pythium Root Rot

Pythium sp./spp.

Confirmed

ND

Stark

Spring Wheat

Triticum aestivum

Unknown

General

Inconclusive

ND

Traill

Plant Id request

general

Amaranth (Pigweed); Redroot

Amaranthus retroflexus

Confirmed

ND

Ward

Tomato

Lycopersicon esculentum

Physiological Responses

Abiotic disorder

Suspected

ND

Ward

Rose

Rosa spp.

Rose Rust

Phragmidium sp.

Confirmed

ND

Wells

Potato

Solanum tuberosum

Growth Regulator Effect

Abiotic disorder

Suspected

PA

Unknown

Grape

Vitis sp./spp.

Grapevine Tomato Gall Midge

Lasioptera vitis

Suspected

Kasia Kinzer
NDSU Plant Diagnostic Lab
Telephone: 701-231-7854


NDSU Crop and Pest Report Home buttonTop of Page buttonTable of Contents buttonPrevious buttonNext button