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 ().
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:
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 |
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.
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
Rhizoctonia 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 (Commercial 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 |
Status and Revision History
Published on Sep 09, 2008
Published with Full Review on Jun 02, 2011
Published with Full Review on Sep 15, 2014