SB61 Annual Plant Disease Clinic Summary 2007

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.

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.

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.

Field Crops (Total Diagnoses: C = 220; H = 5) Diagnostic Responsibilities: 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 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 Clinic: Commercial Nuts Athens Clinic: Fruit (Commerical and Homeowner), 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 (Commerical and Homeowner)
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 (Commerical and Homeowner)
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 (Commerical and Homeowner)
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

The University of Georgia and Ft. Valley State University, the U.S. Department of Agriculture and counties of the state cooperating. Cooperative Extension, the University of Georgia College of Agricultural and Environmental Sciences, offers educational programs, assistance and materials to all people without regard to race, color, national origin, age, gender or disability.

An Equal Opportunity Employer/Affirmative Action Organization Committed to a Diverse Work Force

Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, The University of Georgia College of Agricultural and Environmental Sciences and the U.S. Department of Agriculture cooperating.

Athens Clinic:	Commercial turf, ornamentals, forestry and fruits Homeowner Samples
Address:	Plant Disease Clinic 2106 Miller Plant Sciences Bldg. Athens, GA 30602-4356
Tifton Clinic:	Commercial vegetables, row crops and pecans
Address:	Tifton Plant Disease Clinic Room 116 4604 Research Way Tifton, GA 31793

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

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

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.

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).