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Annual Plant Diseases Clinic Summary - 2007 (SB 61)

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Diseased leaf

Department of Plant Pathology
Compiled by Holly Thornton

Introduction

The Plant Pathology Department at the University of Georgia’s College of Agricultural and Environmental Sciences maintains two plant disease diagnostic clinics—one in Athens, Ga., and one in Tifton, Ga. Commercial turf, fruits, forage crops, greenhouse, ornamental nursery and homeowner samples are analyzed at the Plant Disease Clinic in Athens. Samples of commercial field crops, pecans and vegetables are diagnosed at the Plant Disease Clinic in Tifton. Diagnoses and management recommendations are returned to county faculty. The clinics maintain a computerized database of samples and their diagnoses and a reference library for use by extension agents, specialists, researchers and students.

Extension Plant Pathology specialists also participate in digital plant diagnostics using the DDDI system, which helps provide a more timely diagnosis and recommendation for a number of plant disease samples.

Some pathogens identified in the “Crop Summaries” section are listed by both genus and species, whereas others are identified as the genus or “species.” Our plant disease clinic does not routinely identify plant pathogens by species because species identification is very time-consuming and often not necessary for management recommendations. In cases where only one species is known or where species are easily identifiable, the species of the pathogen is listed.

The following abbreviations are used throughout the summaries:

PDC Plant Disease Clinic
C Commercial
IPM Homeowner IPM Clinic
H Homeowner
TDTD Too deteriorated to diagnose. This indicates that the plant sample submitted to the clinic was too deteriorated to properly diagnose.
ETRI Ectotrophic root-infecting fungi (similar to G. graminis)
GGG Gaeumannomyces graminis var. graminis
LSREP Lower stem, root or environmental problem. This diagnosis indicates that no pathogens were associated with the part of the plant submitted and that the origin of the problem either was occurring lower on the plant or was due to environmental or cultural conditions.

This report includes both physical samples submitted to the Plant Disease Clinics and results from analyses of digital samples submitted through the DDDI system. The DDDI database includes the samples contained herein and serves as a record-keeping system for our diagnostic clinics (http://www.dddi.org/uga).

Finally, it is interesting to see which sample categories have increased or decreased over the last two years. For instance, commercial herbaceous ornamental samples decreased by half from 2006 to 2007. This could be a factor of the severe drought. On the other hand, turfgrass sample submission has increased over the last year. In addition, homeowner sample numbers bounced back from 2006, when the diagnostic clinic was closed for over half the year.

Addresses for submission of physical samples to the Plant Disease Clinics are:

Athens Clinic:


Address:
Commercial turf, ornamentals, forestry and fruits
Homeowner Samples

Plant Disease Clinic
2106 Miller Plant Sciences Bldg.
Athens, GA 30602-4356
Tifton Clinic:

Address:
Commercial vegetables, row crops and pecans

Tifton Plant Disease Clinic
Room 116
4604 Research Way
Tifton, GA 31793

Information for preparation of samples for submission can be found at: http://plantpath.caes.uga.edu/extension/DiseaseLibrary.html

Plant Disease Clinic Summaries

2007 Plant Specimen Diagnoses
Crop Commercial Samples Homeowner
IPM Samples
Total
Field Crops 220 5 225
Vegetables 303 57 360
Fruits & Nuts 105 26 131
Herbaceous Ornamentals 87 47 134
Woody Ornamentals 148 91 239
Trees 80 84 164
Turf 400 95 595
Miscellaneous 7 8 15
Total* 1,350 513 1,863
*The total number of diagnoses shown here is larger than the total number of samples received (shown by Monthly Sample Submission in the table below) because some samples had more than one problem or diagnosis. The largest crop category received by the diagnostic clinics for both commercial and homeowner samples was turfgrass, followed by vegetables (commercial) and woody ornamentals (homeowner).

2007 Monthly Sample Submission Summary
  Samples
Month Commercial Homeowner
January 35 6
February 37 8
March 114 21
April 91 40
May 113 67
June 150 56
July 125 74
August 146 50
September 140 54
October 96 26
November 30 14
December 19 6
Total 1,096 422

Monthly Sample Submission (C & H)

As shown above, the busiest months in the diagnostic clinics are March and June through October. Sample numbers decrease dramatically during the winter months.

Comparisons between the number of samples submitted to the clinic and the number of diagnoses made (shown below) are for both homeowner and commercial samples. The numbers oftentimes differ due to the fact that some plant samples have multiple pathogenic organisms contributing to the death of the plant. This is especially true for turfgrass samples and diseases.

Homeowner IPM Samples & Diagnoses

Commercial Samples & Diagnoses

Distribution of Homeowner Samples by County
County Samples County Samples
Appling 1 Gwinnett 17
Atkinson 2 Hall 1
Bacon 1 Harris 8
Baker 4 Henry 5
Baldwin 2 Houston 2
Banks 1 Jackson 9
Barrow 4 Jeff Davis 3
Bartow 9 Jefferson 3
Berrien 5 Jenkins 7
Bibb 31 Johnson 1
Bryan 1 Laurens 1
Burke 1 Lee 10
Camden 1 Lincoln 1
Candler 3 Long 2
Carroll 13 Lowndes 2
Chatham 6 Lumpkin 3
Cherokee 6 Macon 2
Clarke 21 Madison 4
Clayton 1 Miller 1
Cobb 5 Mitchell 1
Coffee 1 Monroe 20
Columbia 3 Morgan 10
Cook 1 Muscogee 9
Coweta 16 Newton 7
Crawford 1 Oconee 2
Crisp 2 Paulding 2
Dade 2 Pickens 1
Decatur 2 Pierce 8
DeKalb 6 Pulaski 3
Dooly 3 Rabun 3
Dougherty 16 Randolph 1
Douglas 2 Richmond 3
Echols 2 Rockdale 4
Effingham 2 Schley 6
Elbert 1 Stephens 4
Evans 1 Thomas 1
Fannin 2 Toombs 4
Fayette 28 Troup 2
Floyd 1 Union 1
Forsyth 3 Upson 1
Franklin 1 Walker 2
Fulton 4 Walton 1
Gilmer 1 Ware 15
Glynn 1 Webster 1
Gordon 1 Whitfield 3
Grady 7 Wilkes 3
Greene 3 NA* 4
* Samples were submitted without indicating a county of origin.

Distribution of Commercial Samples by County
County Samples County Samples
Appling 5 Jasper 1
Atkinson 2 Jeff Davis 12
acon 17 Jefferson 5
Banks 1 Jenkins 2
Barrow 1 Lamar 7
Bartow 2 Lanier 8
Berrien 38 Laurens 7
Bibb 5 Lee 2
Bleckley 1 Liberty 1
Brantley 2 Lincoln 1
Brooks 1 Lowndes 58
Bulloch 10 Lumpkin 2
Burke 18 Macon 18
Butts 1 Madison 2
Calhoun 2 Marion 1
Camden 3 McDuffie 48
Candler 1 Meriwether 1
Carroll 4 Miller 19
Catoosa 1 Mitchell 11
Chatham 5 Monroe 1
Cherokee 3 Montgomery 4
Clarke 28 Morgan 12
Clay 1 Newton 2
Clinch 7 Oconee 13
Cobb 16 Oglethorpe 1
Coffee 15 Paulding 1
Colquitt 13 Peach 1
Columbia 20 Pickens 1
Cook 13 Pierce 20
Coweta 3 Polk 2
Crisp 5 Pulaski 9
Dade 1 Quitman 1
Dawson 2 Rabun 3
Decatur 7 Randolph 1
DeKalb 12 Richmond 35
Dodge 8 Rockdale 7
Dooly 10 Schley 2
Dougherty 13 Screven 6
Douglas 5 Seminole 11
Early 3 Spalding 1
Echols 17 Stephens 1
Effingham 8 Sumter 4
Emanuel 11 Tattnall 7
Evans 7 Telfair 2
Fayette 5 Tift 23
Floyd 8 Troup 1
Forsyth 10 Turner 12
Fulton 7 Union 3
Gilmer 2 Walker 2
Glynn 1 Walton 6
Gordon 6 Ware 2
Grady 20 Washington 2
Gwinnett 8 Wayne 5
Habersham 3 Webster 7
Hall 3 Wheeler 5
Harris 7 White 1
Hart 2 Wilcox 15
Henry 2 Worth 11
Houston 5 NA* 223
Irwin 9    
* Samples were submitted without indicating a county of origin.

Summary of Diagnoses by Crop

Field Crops (Total Diagnoses: C = 220; H = 5)
Diagnostic Responsibilities:  Tifton and Athens Tifton Clinic: Tobacco, Corn, Cotton, Soybean, Peanut
Athens Clinic: Homeowner samples
Host Disease Causal Organism Samples
Alecia, Hay
C = 1
H = 0
Rust   1
Alfalfa
C = 4
H = 0
Wilt
Crown and Stem Rot
Crown and Stem Rot
No Disease
Undetermined
Sclerotinia sp.
Sclerotinia trifoliorum
1
1
1
1
Amaranth
C = 2
H = 0
Root Rot
LSREP
Pythium sp. 1
1
Bahia Grass
C = 2
H = 2
Head Blight
Anthracnose
Fusarium sp.
Colletotrichum sp.
Helminthosporium sp.
Sclerotinia sp.
1
1
1
1
Bermuda, Hay
C = 2
H = 0
  Helminthosporium sp.
Colletotrichum sp.
1
1
Clover
C = 1
H = 2
Black/Sooty Blotch
No Disease
Unknown
  1
1
1
Corn
C = 14
H = 0
Southern Corn Leaf Blight
Southern Rust
Ear Rot
Smut

No Disease
Bipolaris maydis
Puccinia polysora

Fusarium sp.
Ustilago maydis
Helminthosporium sp.
2
2
2
1
1
6
Cotton
C = 14
H = 0

Rhizoctonia Soreshin
Fusarium Wilt
Leaf Spot
Leaf Spot
No Disease
Rhizoctonia solani
Rhizoctonia sp.
Fusarium sp.
Stemphylium sp.
Alternaria sp.
1
1
1
7
2
2
Fescue, Tall
C = 2
H = 0
Rust  
Bipolaris sp.
1
1
Grain, Small
C = 1
H = 0
Powdery Mildew   1
Millet
C = 3
H = 0
Leaf Spot Pyricularia sp. 3
Oat
C = 5
H = 0
Virus
No Disease
LSREP
Barley Yellow Dwarf 3
1
1
Peanut
C = 45
H = 0
Crown Rot
Leaf Scorch
Limb Rot
Early Leaf Spot
Late Leaf Spot
Funky Leaf Spot
Virus
Collar Rot
White Mold
Cylindrocladium Black Rot
Nematode Damage
Unknown



No Disease
Aspergillus sp.
Leptosphaerulina crassiasca
Rhizoctonia
sp.
Cercospora arachidicola
Cercosporidium personatum

Tomato Spotted Wilt
Diplodia sp.
Sclerotium rolfsii
Cylindrocladium crotalariae
Meloidogyne
sp.

Rhizoctonia sp.
Neocosmospora sp.
Rhizoctonia solani
3
1
1
3
1
1
7
2
2
1
1
2
1
3
2
14
Rye
C = 3
H = 0
No Disease   3
Sorghum
C = 3
H = 0
Gray Leaf Spot

No Disease
Cercospora sp.
Rhizoctonia sp.
1
1
1
Soybean
C = 70
H = 1
Charcoal Rot
Rust
Bacterial Disease
Downy Mildew
Root Rot
Stem Blight
Wilt
Stem Canker/Lesion
White Mold
Leaf Spot

No Disease
TDTD
Unknown
Macrophomina sp.
Phakopsora pachyrhizi

Peronospora manshurica
Rhizoctonia
sp.
Phomopsis sp.
Fusarium sp.
Phomopsis /Diaporthe sp.
Sclerotium rolfsii
Cercospora
sp.
Neocosmospora sp.
4
1
1
13
1
1
1
1
1
1
1
41
1
3
Tobacco
C = 43
H = 0
Collar Rot
Brown Spot
Black Shank
Black Shank Race-1
Stem Rot
Stalk Rot
Virus
Virus




No Disease
TDTD
LSREP
Sclerotinia sclerotiorum
Alternaria
sp.
Phytophthora nicotianae var. parasitica
Phytophthora nicotianae var. parasitica
Sclerotium rolfsii

Erwinia sp.
Tomato Spotted Wilt
Tobacco Mosaic
Rhizoctonia sp.
Rhizoctonia solani
Pythium sp.
Pseudomonas sp.
2
2
6
4
1
1
6
1
1
5
3
1
8
1
1
Wheat
C = 5
H = 0
Virus
No Disease
LSREP
Soil-Borne Wheat 1
2
2

Vegetables (Total Diagnoses: C = 303; H = 57)
Diagnostic Responsibilities:  Tifton and Athens Tifton Clinic: Commercial
Athens Clinic: Homeowner
Host Disease Causal Organism Samples
Arugula
C = 1
H = 0
Root Rot Pythium sp. 1
Basil
C = 2
H = 0
Root Rot
Stem and Leaf Blight
Pythium sp.
Phytophthora sp.
1
1
Bean, Lima
C = 1
H = 1
Unknown
No Disease
  1
1
Bean, Snap
C = 14
H = 4
Ashy Stem Blight
Cottony Leak
Leaf Spot/Blight


No Disease
LSREP
Unknown
TDTD
Macrophomina phaseolina
Pythium sp.
Bacterial
Rhizoctonia solani
Pythium sp.
1
1
1
2
1
9
1
1
1
Cabbage
C = 9
H = 0
Root Rot


LSREP
No Disease
Unknown
Pythium sp.
Rhizoctonia sp.
Rhizoctonia solani
Cold Injury
1
1
1
1
1
4
Cantaloupe
C = 17
H = 0
Gummy Stem Blight
Root Rot
Powdery Mildew
Virus
Crown Decline
No Disease
Mycosphaerella citrullina
Pythium
sp.

Poty
2
2
2
3
1
7
Carrot
C = 1
H = 0
  Rhizoctonia solani 1
Collard
C = 7
H = 3
Root Rot
Nematode Damage
Downy Mildew

No Disease
LSREP
Pythium sp.
Possible
Peronospora parasitica
Alternaria
sp.
1
1
1
1
5
1
Corn, Sweet
C = 8
H = 1
Common Rust
Purple Sheath
Northern Corn Leaf Blight
No Disease
Undetermined
Puccinia sorghi

Exserohilum turicum
1
1
1
5
1
Cucumber
C = 14
H = 0
Virus
Gummy Stem Blight
Downy Mildew

Phytophthora Blight
No Disease
TDTD
Cucumber Mosaic
Mycosphaerella citrullina
Pseudoperonospora cubensis
Pythium
sp.
Phytophthora capsici
1
1
2
1
1
7
1
Eggplant
C = 2
H = 0
Anthracnose
Phomopsis sp.
1
1
Gourd
C = 1
H = 0
Leaf Spot Alternaria sp. 1
Greens, Mustard
C = 1
H = 1
Leaf Spot
LSREP
Cercospora sp. 1
1
Greens, Turnip
Greens, Micro
C = 7
H = 4
Virus
Virus
Root Rot
Leaf Spot

No Disease
LSREP
TDTD
Gemini

R
hizoctonia sp.
Cercospora sp.
Pythium and/or Phytophthora sp.
1
1
1
2
1
2
1
2
Kale
C = 0
H = 3

LSREP
TDTD
Pythium and/or Rhizoctonia sp. 1
1
1
Okra
C = 2
H = 0
Wilt
No Disease
Possible Fusarium sp. 1
1
Onion
C = 11
H = 0
Stem Lesion
Leaf Blight
Basal Plate Rot
Sour Skin
Neck Rot
Bacteria



No Disease
TDTD
Botrytis sp.
Stemphylium sp.
Fusarium sp.
Burkholderia cepacia
Botrytis
sp.

Botrytis allii
Probable Pantoea sp.
Probable Erwinia sp.
1
1
1
1
1
1
1
1
1
1
1
Parsley
C = 0
H = 1
Crown Rot Sclerotinia sclerotiorum 1
Pea
C = 2
H = 2
Stems
Stems

Unknown
Rhizoctonia sp.
Pythium sp.
Fusarium sp.
1
1
1
1
Pepper
C = 33
H = 1
Virus
Fruit Rot
Leaf Spot

Leaf Spot

Stem Lesions
Anthracnose
Leaf Spot

Root and Stem Rot
Roots


LSREP
No Disease
Unknown
TDTD
Tomato Spotted Wilt
Possible Erwinia sp.
Xanthomonas campestris pv. vesicatoria (Copper Sensitive)
Xanthomonas campestris pv. vesicatoria (Copper Insensitive)
Erwinia sp.

Xanthomonas campestris pv. vesicatoria
Possible Pythium sp.
Phytophthora sp.
Pythium sp.
Xanthomonas sp.


Sunscald
2
1
5

1

1
1
1

3
1
5
3
1
7
1
1
Potato, Irish
C = 3
H = 1
Leaf Spot


No Disease
Bacterial
Fusarium sp.
Possible Erwinia sp.
1
1
1
1
Pumpkin
C = 0
H = 3
Blossom / Fruit Blight
Crown Decline
No Disease
Choanephora sp. 1
1
1
Rape
C = 0
H = 1
Root Rot Pythium and/or Rhizoctonia sp. 1
Spinach
C = 2
H = 0
Root Rot
Virus
Pythium sp.
Cucumber Mosaic
1
1
Squash
C = 5
H = 2
Virus
Virus
Phytophthora Blight


Downy Mildew
No Disease
Squash Mosaic
Cucumber Mosaic
Phytophthora capsici
Xanthomonas
sp.
Pythium sp.
Pseudoperonospora cubensis
1
1
1
1
1
1
2
Tomato
C = 42
H = 27
Leaf Mold
Early Blight
Leaf Spot
Virus
Virus
Virus
Virus (Possible)


Blossom End Rot
Cat Facing
No Disease
Unknown
LSREP
TDTD
Insufficient Sample
Fulvia fulva
Alternaria
sp.
Xanthomonas campestris pv. vesicatoria
Tomato Spotted Wilt
Cucumber Mosaic
Tobacco Mosaic
Tomato Yellow Leaf Curl
Pythium sp.
Xanthomonas sp.
1
1
2
22
1
1
1
2
2
3
1
20
5
2
3
2
Unknown
Multiple Samples
C = 0
H = 1
No Disease Herbicide Damage 1
Watermelon
C = 115
H = 1
Gummy Stem Blight
Fruit Blotch
Fusarium Wilt (Probable)
Virus
Nematode Damage
Crown Decline
Powdery Mildew
Virus
Cottony Leak




No Disease
Unknown
Insufficient Sample
Mycosphaerella citrullina
Acidovorax avenae
subsp. citrulli
Fusarium
sp.
Poty
Meloidogyne sp.



Pythium sp.
Fusarium sp.
Erwinia sp.
Rhizoctonia solani
Pythium
sp.
3
19
17
3
1
2
4
1
1
3
1
1
2
56
1
1
Zucchini
C = 1
H = 0
Downy Mildew Pseudoperonospora cubensis 1

Fruits and Nuts (Total Diagnoses: C = 105; H = 26)
Diagnostic Responsibilities:  Tifton and Athens Tifton Clinic: Commercial Nuts
Athens Clinic: Fruit (C &H), Homeowner Nuts
Host Disease Causal Organism Samples
Apple
C = 3
H = 4
White Rot
Bot Canker
Leaf Spot
Galling

No Disease
Botryosphaeria sp.
Botryosphaeria sp.
Botryosphaeria sp.
Unknown
Alternaria sp.
1
1
1
1
1
2
Blackberry
C = 6
H = 4
Cane Blotch
Fire Blight
White Rot
Cane & Leaf Rust
Virus

No Disease
Unknown
Cephaleuros virescens
Erwinia amylovora

Kuehneola uredinis
Tomato Ringspot
Fusicoccum sp.
1
1
1
2
1
1
1
2
Blueberry
C = 56
H = 2
Twig Blight
Root Rot
Canker
Root Rot
Root Rot
Root Rot






Xyellela (questionable)
No Disease
Unknown
LSREP
Phomopsis sp.
Pythium sp.
Sphaeropsis sp.
Phytophthora sp.
Pythium sp. & Phytophthora sp.

Rhizoctonia sp.
Pythium sp.
Phytophthora sp.
Pythium & Phytophthora sp.
Alternaria sp.
Phyllosticta sp.
Xyellela fastidiosa
1
4
1
2
1
4
1
4
3
1
1
1
1
5
13
15
Cherry
C = 0
H = 1
Shot Hole Blumeriella jaapii 1
Citrus
C = 3
H = 1

No Disease
No Sample Sent
Cercospora sp. 1
2
1
Fig
C = 0
H = 3
Anthracnose
Secondary Organisms
LSREP
  1
1
1
Grape, Wine
C = 5
H = 1
Bitter Rot

No Disease
Melanconium fuligineum
Botrytis
sp.
1
1
4
Muscadine
C = 2
H = 1
Root Rot

No Disease
Pythium sp.
Phytophthora sp.
1
1
1
Peach
C = 1
H = 1
Brown Rot
No Disease
Monilinia fructicola 1
1
Pear, Pineapple
C = 0
H = 1
LSREP   1
Pecan
C = 5
H = 0
Unknown
No Disease
  2
3
Persimmon
C = 3
H = 0
Leaf Spot
No Disease
Unknown
Cercospora sp. 1
1
1
Plum
C = 0
H = 3
Canker
Shot Hole
LSREP

Blumeriella jaapii
1
1
1
Pomegranate
C = 2
H = 3
Fruit Rot
Heart Rot

LSREP


Pestalotia sp.
2
1
1
1
Ribes
C = 0
H = 1
LSREP   1
Strawberry
C = 19
H = 0
Leaf Spot
Root Rot
Root Rot
Root Rot
Crown Rot
Leaf Spot, Bacterial
Root & Crown Rot
Seedling & Basal Stem Rot
Anthracnose (Possible)




No Disease
LSREP
Mycosphaerella sp.
Phytophthora sp.
Pythium sp.

Phytophthora sp.
Xanthomonas sp.
Rhizoctonia sp.
Rhizoctonia sp.

Phomopsis sp.
Pythium sp.
Botrytis sp.
Phytophthora sp.
1
2
1
1
2
1
1
1
1
2
1
1
1
2
1

Herbaceous Ornamentals (Total Diagnoses: C = 87; H = 47)
Diagnostic Responsibilities:  Athens Clinic: All Samples (Commerical and Homeowner)
Host Disease Causal Organism Samples
Agapanthus
C = 1
H = 0
Soft Rot, Bacterial Erwinia carotovora 1
Agalinis
C = 1
H =0
No Disease   1
Ajuga
C = 2
H = 0
Crown & Root Rot
Crown Rot
Phoma sp.
Phoma sp.
1
1
Amaryllis
C = 0
H = 1
No Disease   1
Argyranthemum
C = 1
H = 0
Crown Gall Agrobacterium tumefaciens 1
Acorus
C = 0
H = 1
No Disease   1
Begonia
C = 2
H = 2
Stem & Root Rot
Root Rot

No Disease
Fusarium sp.
Pythium sp.
Pythium sp.
1
1
1
1
Bromeliad
C = 0
H = 1
Insufficient Sample   1
Cactus
C = 0
H = 3
Sooty Mold
No Disease
LSREP
  1
1
1
Calibrochoa
C = 1
H = 0
  Pythium sp. & Rhizoctonia sp. 1
Callicarpa
C = 1
H = 0
No Disease   1
Clematis
C = 0
H = 1
No Disease   1
Chrysanthemum
C = 6
H = 0
Root Rot
Stem Rot
No Disease
Pythium sp.
Fusarium sp.
2
1
3
Coleus
C = 0
H = 1
Downy Mildew Peronospora sp. 1
Dahlia
C = 1
H = 0
Stem Rot Rhizoctonia sp. 1
Daylily
C = 2
H = 1
Crown Rot
Root Rot
No Disease
Rhizoctonia sp.
Pythium sp. & Fusarium sp.
1
1
1
Euphorbia
C = 1
H = 0
Root Rot Pythium sp. 1
Fern
C = 1
H = 2
No Disease   3
Geranium
C = 2
H = 0
No Disease   2
Helleborus
C = 1
H = 2
Crown Rot
Downy Mildew
Phytophthora sp.
Peronospora pulveracea
Cladosporium
sp.
1
1
1
Heuchera
C = 2
H = 0
Root Rot
No Disease
Pythium sp. & Phytophthora sp. 1
1
Hollyhock
C = 0
H = 2
Rust Puccinia malvacearum 2
Hosta
C = 14
H = 0
Anthracnose
Virus
Virus
No Disease
Colletotrichum sp.
Tomato Spotted Wilt
Hosta Virus X
1
1
6
6
Houseplants, Misc.
C = 0
H = 1
No Disease   1
Impatiens
C = 6
H = 0
Crown Rot
Root Rot
Nematode Damage
No Disease
Rhizoctonia sp.
Pythium sp. & Rhizoctonia sp.
Meloidogyne sp.
1
1
1
3
Iris
C = 2
H = 3
Leaf Spot
Virus
Virus
Virus
LSREP
Heterosporium iridis
Tobacco Ringspot
Poty
Possible
1
1
1
1
1
Ivy
C = 1
H = 5
Leaf Spot, Bacterial
Anthracnose
Root Rot
Xanthomonas campestris pv. hedera
Colletotrichum
sp.
Phytophthora sp.
Macrophoma sp.
Pythium sp. and Clamp Fungi
1
1
1
1
1
Kalanchoe
C = 1
H = 0
No Disease   1
Kale, Ornamental
C = 1
H = 0
Wire Stem Rhizoctonia sp. 1
Liriope
C = 7
H = 2
Crown Rot
Anthracnose
Crown Rot
Crown Rot
Root Rot
No Disease
Fusarium sp.
Colletotrichum sp.
Fusarium sp. & Rhizoctonia sp.
Phytophthora palmivora
Pythium
sp. & Phytophthora sp.
2
2
1
1
1
2
Miscanthus
C = 0
H = 1
No Disease   1
Mondo Grass
C = 2
H = 0
Anthracnose
No Disease
Colletotrichum sp. 1
1
Monkey Face
C = 0
H = 1
No Disease   1
Orchid
C = 4
H = 0
Crown & Root Rot
Root Rot
Root Rot
No Disease
Fusarium sp.
Pythium sp. & Rhizoctonia sp.
Pythium sp.
1
1
1
1
Osteospermum
C = 1
H = 0
Crown Rot Rhizoctonia sp. 1
Pachysandra
C = 0
H = 3
Stem Lesion
Leaf Spot
Unknown
Rhizoctonia sp.
Volutella sp.
1
1
1
Panicum
C = 1
H = 0
Leaf Rust Puccinia sp. 1
Pansy
C = 5
H = 1
Crown & Stem Rot
Black Root Rot
No Disease
Botrytis sp.
Thielaviopsis sp.
1
2
3
Penta
C = 2
H = 0
Root Rot
No Disease
Phytophthora sp. 1
1
Petunia
C = 1
H = 3
Blight
Root Rot
Botrytis sp.
Pythium sp. & Rhizoctonia sp.
Rhizoctonia sp.
Pythium sp.
1
1
1
1
Phlox
C = 1
H = 0
No Disease   1
Poinsettia
C = 3
H = 0
Stem Rot
No Disease
Phytophthora sp. 1
2
Sansevieria
C = 1
H = 0
Crown Rot Fusarium sp. 1
Sarracenia
C = 2
H = 0

No Disease
Penicillium sp. 1
1
Scaveola
C = 1
H = 0
Root Rot Pythium sp. & Phytophthora sp. 1
Schefflera
C = 0
H = 1
Bacterial or Viral (Possible)   1
Snapdragon
C = 1
H = 1
Rust
Root Rot
Puccinia sp.
Pythium sp.
1
1
Streptocarpus
C = 2
H = 0
No Disease   2
Tulip
C = 0
H = 3


LSREP
Botrytis sp.
Penicillium sp.
Cold Damage
1
1
1
Thrift
C = 0
H = 1
Web Blight Rhizoctonia sp. 1
Verbena
C = 1
H = 0
No Disease   1
Vinca
C = 2
H = 1
Black Root Rot
Root & Stem Rot
No Disease
Thielaviopsis sp. 1
1
1
Zinnia
C = 0
H = 3
Stem Rot
Root Rot
Virus
Alternaria sp.
Pythium sp.
Tomato Spotted Wilt
1
1
1

Trees (Total Diagnoses: C = 80; H = 84)
Diagnostic Responsibilities:  Athens Clinic: All Samples (C &H)
Host Disease Causal Organism Samples
Birch
C = 1
H = 0
LSREP   1
Cedar, Deodara
C = 1
H = 0
LSREP   1
Cherry
C = 0
H = 2
LSREP
Unknown
  1
1
Conifer
C = 0
H = 1
LSREP   1
Cordyline
C = 1
H = 0
No Disease   1
Crape Myrtle
C = 1
H = 3
Sooty Mold
No Disease
LSREP
  1
1
2
Cryptomeria
C = 15
H = 16
Twig Blight
Bot Canker


Secondary Organisms
No Disease
LSREP
Cercosporidium sp.
Fusicoccum sp.
Colletotrichum sp.
Alternaria sp.
1
1
1
1
4
16
7
Cypress, Leyland
C = 11
H = 8
Canker
Root Rot
Root Rot
Needle Blight
Bot Canker
No Disease
LSREP
Possible Seiridium or Bot

Pythium sp.
Cercosporidium sp.
Sphaeropsis sp.
5
1
1
2
1
8
1
Cupressus
C = 1
H = 0
No Disease   1
Dogwood
C = 0
H = 2
No Disease
LSREP
  1
1
Ehretia
C = 1
H = 0
No Disease   1
Fagus
C = 0
H = 1
Heart/Root Rot and/or Slime Flux   1
Ficus
C = 1
H = 0
Leaf Spot Corynespora sp. 1
Hardwoods, Misc.
C = 0
H = 2
  Algae
Bacteria
1
1
Hemlock
C = 0
H = 1
No Disease   1
Magnolia
C = 9
H = 5
Algal Leaf Spot
Powdery Mildew
Root & Stem Rot
No Disease
LSREP
LSREP
Unknown
Cephaleuros sp.

Fusarium sp.

Transplant Shock
2
2
1
5
1
2
1
Maple
C = 14
H = 15
Tar Spot
Leaf Spot
Anthracnose
Leaf Spot
Bot Canker
Root Rot

No Disease
LSREP
Unknown
Rhytisma sp.
Bacterial
Gloeosporium sp.
Cristulariella sp.
Sphaeropsis sp.
Phytophthora sp.
Coenocytic hyphae (Possible Oomycete)
2
1
1
1
1
1
1
17
3
1
Metasequoia
C = 1
H = 0
Charcoal Rot Macrophomina phaseoli 1
Myrtle
C = 1
H = 0
No Disease   1
Oak
C = 7
H = 13
Canker
Canker
Leaf Spot
Wetwood

No Disease
LSREP
LSREP
Sample Sent Forward
Endothiella sp.
Nectria sp.
Phyllosticta sp.
Bacterial
Cordyceps sp.

Lightning Damage

To Entomology
1
1
1
1
1
7
1
6
1
Palm
C = 2
H = 1

LSREP
No Disease
Pythium sp.
Transplant Shock
1
1
1
Pear
C = 0
H = 2
No Disease
LSREP
  1
1
Pine
C = 5
H = 3
Crown Rot
Root Rot
Root Rot


No Disease
LSREP
Pythium sp.
Phytophthora sp.
Pythium sp. & Rhizoctonia sp.
Algae
Bacteria

Air Pollution
1
1
1
1
1
3
1
Poplar
C = 0
H = 2
LSREP
Unable to Diagnose
  1
1
Prunus
C = 1
H = 0
No Disease   1
Redbud
C = 0
H = 1
No Disease   1
Spruce
C = 0
H = 2

LSREP
Calonectria sp. 1
1
Thuja
C = 5
H = 1
Bot Canker
Root Rot
Needle Blight
No Disease
LSREP
Botryosphaeria sp.

Cercosporidium sp.
1
1
1
2
1
Unknown
C = 1
H = 2
No Disease
Unable to Diagnose
  2
1
Vitex
C = 1
H = 0
Root & Crown Rot Phytophthora sp. & Rhizoctonia sp. 1
Yew
C = 0
H = 1
LSREP   1

Woody Ornamentals (Total Diagnoses: C = 148; H = 91)
Diagnostic Responsibilities:  Athens Clinic: All Samples (C &H)
Host Disease Causal Organism Samples
Althea
C = 1
H = 0
No Disease   1
Arborvitae
C = 5
H = 1
Root Rot
No Disease
Phytophthora sp. 1
5
Aucuba
C = 3
H = 1
Anthracnose
No Disease
LSREP
  1
1
2
Azalea
C = 15
H = 5
Dieback
Root Rot
Root Decline
Powdery Mildew
Root Rot
Root Rot
Anthracnose
Anthracnose
Root Rot

Leaf Spot
No Disease
LSREP
Botryosphaeria sp.
Pythium sp. & Phytophthora sp.
Unknown Fungi
Microsphaera azaleae
Pythium
sp.
Phytophthora sp.
Colletotrichum sp.
Gloeosporium sp.
Pythium sp. & Rhizoctonia sp.
Basidiomycete
Cylindrocladium
sp.
1
3
1
1
2
1
1
1
1
1
1
4
2
Barberry
C = 1
H = 0
TDTD   1
Bougainvillea
C = 0
H = 1
No Disease   1
Boxwood
C = 8
H = 8
Volutella Blight
Root Rot
Boxwood Decine
Root Rot
Root Rot
No Disease
Unknown
Volutella buxi
Pythium
sp. Phytophthora sp.
Pythium sp. & Phytophthora sp.
4
2
1
1
2
5
1
Camellia
C = 18
H = 10
Bot Canker
Leaf Spot
Root Rot
Anthracnose
Leaf Spot
Dieback
Leaf Gall
No Disease
LSREP
Unknown
Botryosphaeria sp. Pythium sp. & Rhizoctonia sp.
Gloeosporium sp.
Phyllosticta sp.
Leptosphaeria sp.
Exobasidium
1
1
1
1
1
1
1
17
3
1
Chamaecyparis
C = 0
H = 2
Twig Blight
No Disease
Phomopsis sp. 1
1
Chionanthus
C = 0
H= 1
Slime Flux/Wetwood   1
Cleyera
C = 1
H = 1
No Disease   2
Daphne
C = 0
H = 1
No Disease   1
Duranta
C = 0
H = 1
Slime Mold   1
Elaeagnus
C = 2
H = 0
Trunk Rot
No Disease
Phytophthora cactorum 1
1
Euonymus
C = 1
H = 1
Slime Mold
No Disease
  1
1
Fatsia
C = 0
H = 1
Sooty Mold   1
Fig, creeping
C = 1
H = 0
Root Rot Phytophthora sp. & Fusarium sp. 1
Forsythia
C = 0
H = 1
Nematode Damage
(Root Knot)
Meloidogyne sp. 1
Fothergilla
C = 1
H = 0
Leaf Spot Cercospora sp. 1
Gardenia
C = 0
H = 3
No Disease
LSREP
  1
2
Hibiscus
C = 2
H = 0
No Disease
Insufficient Sample
  1
1
Holly
C = 19
H = 11
Root Rot
Black Root Rot
Root Rot
Root Rot
Leaf Spot
Canker
Canker
Bot Canker
Aerial Blight


Algal Leaf Spot
No Disease
LSREP
Unknown

Thielaviopsis sp.
Rhizoctonia sp.
Pythium sp.
Colletotrichum sp.
Phomopsis sp.
Leptosphaeria sp.

Rhizoctonia sp.
Pestalotia sp.
Fusarium sp.
1
1
2
2
1
1
1
1
1
1
1
1
11
4
1
Hydrangea
C = 15
H = 4
Leaf Spot
Root Rot
Root Rot
Root Rot
Stem Rot
No Disease
Cercospora sp.
Pythium sp.
Pythium sp. & Rhizoctonia sp.
Phytophthora sp. & Rhizoctonia sp.
Fusarium sp.
1
2
1
1
1
13
Illicium
C = 4
H = 0
Leaf Spot
Leaf Spot
Bot Canker
No Disease
Cercospora sp.
Gloeosporium sp.
Sphaeropsis sp.
1
1
1
1
Jasmine
C = 2
H = 4
Leaf Spot, Bacterial
Southern Blight
Root Rot
Root Rot

LSREP
Possible
Sclerotium rolfsii
Pythium
sp.
Rhizoctonia sp.
Possible Rhizoctonia sp.
1
1
1
1
1
1
Juniper
C = 6
H = 6
Aerial Blight

Root Rot
Twig Blight
Canker (Possible)
No Disease
LSREP
Unknown
Rhizoctonia sp.
Verticillium sp.
Pythium sp. & Phytophthora sp.
Pestalotia sp.
1
1
1
1
1
5
1
1
Kolkwitzia
C = 1
H = 0
Root Rot Pythium sp. 1
Hypericum
C = 2
H = 0
Black Root Rot
Root Rot
Thielaviopsis sp.
Pythium sp. & Rhizoctonia sp.
1
1
Lantana
C = 1
H = 1
Nematode Damage
No Disease
Meloidogyne sp. 1
1
Laurel, Cherry
C = 0
H = 2
Black Root Rot
Shot Hole
Thielaviopsis basicola
Scolytus rugulosus
1
1
Lavandula
C = 1
H = 0
Root Rot Pythium sp. & Rhizoctonia sp. 1
Leucothoe
C = 1
H = 2
Root Rot
Powdery Mildew
LSREP
Pythium sp.
Erysiphe vaccinii
1
1
1
Ligustrum
C = 4
H = 3
Leaf Spot
Wood Rotting Fungi
Sooty Mold
No Disease
LSREP
Cercospora sp.
Armillaria sp.
1
1
1
3
1
Loropetalum
C = 1
H = 0
TDTD   1
Mahonia
C =1
H = 0
Root Rot Pythium sp. 1
Nandina
C = 3
H = 0
Stem & Root Rot
Root Rot
Leaf Spot
Rhizoctonia sp.
Pythium sp.
Cercospora sp.
1
1
1
Physocarpus
C = 1
H = 0
No Disease   1
Pieris
C = 2
H = 0
Black Root Rot
Root Rot
Thielaviopsis basicola
Pythium
sp. & Rhizoctonia sp.
1
1
Pittosporum
C = 1
H = 0
  Coenocytic hyphae (Possible Oomycete) 1
Rhaphiolepis
C = 3
H = 3
Leaf Spot
Leaf Spot
Root Rot
No Disease
TDTD
Entomosporium sp.
Cercospora sp.
Pythium sp. & Phytophthora sp.
2
1
1
1
1
Rhododendron
C = 2
H = 2
Root Rot
No Disease
  1
3
Rose
C = 12
H = 9
Root Rot
Black Spot
Leaf Spot
Wilt
Root Rot
Root Rot
Downy Mildew

No Disease
LSREP
Unknown
Possible Armillaria
Marssonina rosea
Cercospora
sp.
Verticillium dahliae
Rhizoctonia
sp.
Phytophthora sp.
Peronospora sparsa
Alternaria
sp.
1
2
1
2
1
1
1
1
7
3
1
Spirea
C = 0
H = 1
TDTD   1
Tea Olive
C = 1
H = 0
No Disease   1
Unknown
C = 0
H = 2
No Disease
LSREP
 
Transplant Shock
1
1
Viburnum
C = 6
H = 3
Root Rot
No Disease
LSREP
Pythium sp. & Phytophthora sp. 1
7
1

Turf and Forage Grasses (Total Diagnoses: C = 400; H = 195)
Diagnostic Responsibilities: Athens Clinic: All Samples (C & H)
Host Disease Causal Organism Samples
Bentgrass
C = 80
H = 0
Anthracnose (Basal Rot)
ETRI
ETRI
Summer Patch




Nematode Damage
Sulfides/Anaerobic Conditions
No Disease
Colletotrichum sp.

Magnaporthe poae or GGGMagnaporthe sp.
Pythium sp.
Rhizoctonia sp.
Algae
GGG
Suspect or Recommend Check
23
2
3
1
21
8
3
1
8
5
5
Bermuda
C = 88
H = 23
Brown Patch
Large Patch
Rust
ETRI
Take-all
Dollar Spot
SDS
Bermuda Decline
Rust








Saprophyte
No Disease
Insufficient Sample
TDTD
Rhizoctonia sp.
Rhizoctonia sp.
Puccinia sp.

GGG
Sclerotinia homeocarpa
Possible

Puccinia cynodontis
Helminthosporium
sp.
Pythium sp.
Rhizoctonia sp.
Bipolaris sp.
Colletotrichum sp.
Curvularia sp.
Cladosporium sp.
Sclerotinia homeocarpa
3
4
2
7
24
1
1
3
1
4
12
16
9
3
4
1
1
1
9
1
4
Bluegrass
C = 0
H = 1
ETRI   1
Centipede
C = 66
H = 57
Take-all
Fairy Ring
Large Patch
ETRI
Root Rot
Gray Leaf Spot
Anthracnose
Fairy Ring






No Disease
LSREP
Insufficient Sample
TDTD
GGG
Possible
Rhizoctonia sp. Rhizoctonia sp.
Pyricularia sp.
Colletotrichum sp.

Curvularia sp.
Colletotrichum sp.
Rhizoctonia sp.
Bipolaris sp.
Pythium sp.
Clamp Fungi
42
10
5
2
2
1
1
1
7
4
17
2
4
1
21
1
1
1
Fescue
C = 8
H = 4
Brown Patch
ETRI
Nematode Damage



No Disease
Unable to Diagnose
Rhizoctonia sp.  
Rhizoctonia sp.
Pythium sp.
Colletotrichum sp.
1
1
1
2
3
1
2
1
Grass
C = 1
H = 16
Rust
Take-all
Anthracnose
Large Patch


No Disease
TDTD
Puccinia sp.
GGG
Gloeosporium
sp.
Rhizoctonia sp.
Rhizoctonia sp.
Curvularia sp.
1
8
1
1
1
3
1
1
Greens
C = 28
H = 0
Summer Patch
ETRI




Nematode Damage
  Rhizoctonia sp.
Pythium sp.
Magnaporthe poae
Colletotrichum
sp.
2
3
3
12
3
4
1
Lawn
C = 0
H = 7
Earth Stars
Take-all


No Disease
LSREP
Gasteromycetes
GGG
Drechslera
sp.
Clamp Fungi
1
2
1
1
1
1
Paspalum, Seashore
C = 16
H = 0
Anthracnose
Rhizoctonia sp.
GGG
Curvularia
sp.
Bipolaris sp.
1
7
4
1
3
Ryegrass
C = 2
H = 0
  Pythium sp. 2
St. Augustine
C = 50
H = 49
Take-all
Slime Mold
Root Rot
Root Rot
Large Patch
ETRI-mycelium
Anthracnose
Fairy Ring






No Disease
Unable to Determine
Insufficient Sample
GGG

Pythium
sp.
Rhizoctonia sp.
Rhizoctonia sp.

Colletotrichum sp. Curvularia sp.
Bipolaris sp.
Pythium sp.
Rhizoctonia sp.
Drechslera sp.
Fungal mass
61
1
1
1
4
1
2
2
5
3
4
7
1
1
3
1
2
Sod
C = 1
H = 0
  Basidiomycete 1
Turf
C = 3
H = 9
Large Patch
Take-all


Nematode Damage
No Disease
Rhizoctonia sp.
GGG
Curvularia
sp.
Pythium sp.
Suspect
3
4
1
1
1
3
Unknown
C = 0
H = 2
Take-all GGG
Curvularia
sp.
1
1
Zoysia
C = 57
H = 27
Large Patch
Rust
Take-all
ETRI
Root Rot
Fairy Ring








No Disease
Unknown
Insufficient Sample
TDTD
Rhizoctonia sp.
Puccinia zoysia
GGG
Pythium
sp.


Rhizoctonia sp.
Bipolaris sp.
Curvularia sp.
Colletotrichum sp.
Rhizoctonia solani
Pythium
sp.
Clamp Fungi
Stress Fungi
5
2
12
3
2
5
11
6
8
3
1
2
1
1
17
1
1
3

Miscellaneous (Total Diagnoses: C = 7; H = 8)
Host Disease Causal Organism Samples
Fungal ID
C = 1
H = 2
Conk
Mushroom
ID of Fungi on Soil Surface
Wood Rot Fungi
Fuligo septica
Chromelosporium
sp.
1
1
1
Misc. Unknown
C = 6
H = 4
Various Cuttings
Unknown
Wood
Leaf Spot
No Disease
Unknown
TDTD
LSREP Cold/Drought Stress
Insect Galls
Stemonitis sp.
Cercospora sp.
1
1
1
4
1
1
1
Plant ID
C = 0
H = 2
Plant ID
Plant ID
Zoysia sp.
Sida rhombifolia
1
1

2006 vs. 2007 Commercial Sample Comparison

2006 vs. 2007 Homeowner Sample Comparison

2007 Commercial vs. Homeowner Sample Comparison

Reviewed on Sep 15, 2014