ISSUE 2   May 20, 2010

SUBMITTING SAMPLES TO THE NDSU PLANT DIAGNOSTIC LAB

If you intend to submit a sample to the lab for disease diagnosis, please consider the following sampling and submission tips:

  1. For general plant problems, try to send several affected plants showing a range of symptoms. Dead plants rarely are informative - avoid sending completely dead plants.
  2. Try to send entire plants, when feasible, since some above-ground symptoms can be attributed to a problem with the lower stem or roots.
  3. When digging plants, try to keep the roots intact with the soil, as a root ball, to help prevent the sample from drying out.
  4. Wrap foliage in DRY paper towels (to absorb any moisture that causes decay).
  5. The foliage should be wrapped in dry paper towels to absorb moisture (to prevent decay).
  6. Only roots (NOT foliage) may be wrapped in damp (not wet) paper towels, and wrapped in a separate plastic bag (tied off at the stem) to prevent soil and moisture from coming in contact with leaves.
  7. Place entire sample in a resealable plastic bag.
  8. Do not allow leaves, paper tags, or labels to come in contact with soil or moisture.

More information on how to submit other materials can be found on our website, www.ag.ndsu.nodak.edu/diaglab.  

IMPORTANT: Do not allow any moisture to contact foliage. Moisture on foliage will cause the sample to deteriorate before it arrives.

Our US Postal mailing address is:

NDSU Plant Diagnostic Lab
PO Box 6050, Dept 7660
Fargo, ND 58108-6050

If you send samples by UPS, Fedex, or other private shipper, the address is:

NDSU Plant Diagnostic Lab
Dept of Plant Pathology
306 Walster Hall
Fargo, ND 58102

 

NDSU PLANT DIAGNOSTIC LAB UPDATE

Summer disease diagnostic samples have begun to arrive in the lab. Besides fulfilling disease diagnosis requests for crops, trees, lawns, fruits, vegetables, and ornamentals, the lab accepts samples for certain seed health tests, phytosanitary tests, special research projects, identification requests (insects, fungi/mold, plants, and other), and samples that are part of coordinated surveys. Since January 1, 2010, we have processed at least 1,265 samples and applied at least 1,825 diagnoses to these samples. Of all samples received, 33 were for disease diagnosis, 9 were identification requests, 37 were submitted for the wheat virus survey, 51 were for seed health testing, 395 were phytosanitary samples, and 740 were for research. The following table summarizes the North Dakota disease diagnostic and identification request samples processed from January 1 through May 18, 2010.

State

County

Host

Diagnosis

Diagnosis/ID Taxonomic Name

ND

Bowman

Spruce (Picea sp.)

High Soluble Salt

Abiotic disorder

ND

Burleigh

Black Ash (Fraxinus nigra)

Ash Flower Gall Mite (Eriophyes fraxiniflora)

Eriophyes fraxiniflora

ND

Burleigh

Blue Spruce (Picea pungens)

Chemical Injury

Abiotic disorder

ND

Burleigh

Plant Id request

Tatarian Honeysuckle (Lonicera tatarica)

Lonicera tatarica

ND

Burleigh

Plant Id request

Kentucky Bluegrass (Poa pratensis)

Poa pratensis pratensis

ND

Burleigh

Spruce (Picea sp.)

Transplant Shock; Stress

Abiotic disorder

ND

Cass

Blue Spruce (Picea pungens)

Root Problems

Abiotic disorder

ND

Cass

Cucumber (Cucumis sativus)

Phytotoxicity

Abiotic disorder

ND

Cass

Mold ID Request

Cladosporium sp.

Cladosporium sp./spp.

ND

Cass

Impatiens (Impatiens spp.)

Excessive Water

Abiotic disorder

ND

Cass

Mold ID Request

Wood Decay Fungus

Unidentified Wood Decay Fungus

ND

Cass

Pine (Pinus spp.)

Unknown

General

ND

Cass

Plant Id request

Double Flowering Plum (Prunus triloba ""Multiplex"")

 

ND

Cass

Plant Id request

Unknown

General

ND

Cass

Spruce (Picea sp.)

Cooley Spruce Gall Adelgid (Adelges cooleyi)

Adelges cooleyi

ND

Cass

Spruce (Picea sp.)

Transplant Shock; Stress

Abiotic disorder

ND

Cass

Turfgrass

Snow Mold (Typhula sp.) (2)

Typhula sp./spp.

ND

Cavalier

Dry Field peas (Pisum sativum)

admixture (mixed genotypes)

different genotype

ND

Cavalier

Insect Id request

Darkling Beetles (Family Tenebrionidae)

Family Tenebrionidae

ND

Emmons

Spruce (Picea sp.)

Root Problems

Abiotic disorder

ND

Foster

Spruce (Picea sp.)

Unknown Abiotic Disorder

Abiotic disorder

ND

Griggs

Insect Id request

Varied Carpet Beetle (Antrenus sp.)

Anthrenus verbasci

ND

Griggs

Insect Id request

Common House Spider

Parasteatoda tepidariorum

ND

Logan

Plant Id request

Variegated Rubber Plant (Ficus elastica ""Doescheri"")

 

ND

Mclean

Impatiens (Impatiens spp.)

Common Thrips (Family Thripidae) (5)

Family Thripidae

ND

Oliver

Blue Spruce (Picea pungens)

Winter Injury

Abiotic disorder

ND

Ramsey

Mold ID Request

Unidentified mold (dematiaceous hyphomycete)

Unidentified Mold

ND

Stark

Pine (Pinus spp.)

Unknown

General

ND

Stutsman

Blue Spruce (Picea pungens)

Root Problems

Abiotic disorder

ND

Traill

Turfgrass

Snow Mold (Typhula sp.)

Typhula sp./spp.

ND

Wells

Spruce (Picea sp.)

Yellowheaded Spruce Sawfly (Pikonema alaskensis)

Pikonema alaskensis

ND

Williams

Ponderosa Pine (Pinus ponderosa)

Environmental stress

Abiotic disorder

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


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