Annual Plant Disease Clinic Summary 2007

Transcription

1 Annual Plant Disease Clinic Summary 007 Department of Plant Pathology Compiled by Holly Thornton Reviewed by Jean Williams Woodward

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3 Annual Plant Disease Clinic Summary 007 Table of Contents Introduction... iii Plant Disease Clinic Summaries Plant Specimen Diagnoses... Monthly Sample Submission Summary... Homeowner IPM Samples and Diagnoses (Graph)... Commercial Samples and Diagnoses (Graph)... Distribution of Homeowner Sample Submission by County... 5 Distribution of Commercial Sample Submission by County... 6 Summary of Diagnoses by Crop Field Crops... 8 Vegetables... 0 Fruits and Nuts... Herbaceous Ornamentals... 6 Trees... 0 Woody Ornamentals... Turf and Forage Grasses... 7 Miscellaneous Commercial Sample Comparison (Graph) Homeowner Sample Comparison (Graph) Commercial vs. Homeowner Sample Comparison (Graph)...

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5 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 : 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 006 to 007. 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 006, when the diagnostic clinic was closed for over half the year. iii

6 Addresses for submission of physical samples to the Plant Disease Clinics are: Athens Clinic: Address: Tifton Clinic: Address: Commercial turf, ornamentals, forestry and fruits Homeowner Samples Plant Disease Clinic 06 Miller Plant Sciences Bldg. Athens, GA Commercial vegetables, row crops and pecans Tifton Plant Disease Clinic Room 6 60 Research Way Tifton, GA 79 Information for preparation of samples for submission can be found at: iv

7 Plant Disease Clinic Summaries: 007 Plant Specimen Diagnoses Crop Commercial Samples Homeowner IPM Samples Total Field Crops Vegetables Fruits & Nuts 05 6 Herbaceous Ornamentals 87 7 Woody Ornamentals Trees Turf Miscellaneous Total* *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). 007 Monthly Sample Submission Summary Samples Month Commercial Homeowner January 5 6 February 7 8 March April 9 0 May 67 June July 5 7 August 6 50 September 0 5 October 96 6 November 0 December 9 6 Total,096

8 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 are shown on pages and 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.

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11 Distribution of Homeowner Samples by County County Samples County Samples Appling Gwinnett 7 Atkinson Hall Bacon Harris 8 Baker Henry 5 Baldwin Houston Banks Jackson 9 Barrow Jeff Davis Bartow 9 Jefferson Berrien 5 Jenkins 7 Bibb Johnson Bryan Laurens Burke Lee 0 Camden Lincoln Candler Long Carroll Lowndes Chatham 6 Lumpkin Cherokee 6 Macon Clarke Madison Clayton Miller Cobb 5 Mitchell Coffee Monroe 0 Columbia Morgan 0 Cook Muscogee 9 Coweta 6 Newton 7 Crawford Oconee Crisp Paulding Dade Pickens Decatur Pierce 8 DeKalb 6 Pulaski Dooly Rabun Dougherty 6 Randolph Douglas Richmond Echols Rockdale Effingham Schley 6 Elbert Stephens Evans Thomas Fannin Toombs Fayette 8 Troup Floyd Union Forsyth Upson Franklin Walker Fulton Walton Gilmer Ware 5 Glynn Webster Gordon Whitfield Grady 7 Wilkes Greene NA* * Samples were submitted without indicating a county of origin. 5

12 Distribution of Commercial Samples by County County Samples County Samples Appling 5 Gilmer Atkinson Glynn Bacon 7 Gordon 6 Banks Grady 0 Barrow Gwinnett 8 Bartow Habersham Berrien 8 Hall Bibb 5 Harris 7 Bleckley Hart Brantley Henry Brooks Houston 5 Bulloch 0 Irwin 9 Burke 8 Jasper Butts Jeff Davis Calhoun Jefferson 5 Camden Jenkins Candler Lamar 7 Carroll Lanier 8 Catoosa Laurens 7 Chatham 5 Lee Cherokee Liberty Clarke 8 Lincoln Clay Lowndes 58 Clinch 7 Lumpkin Cobb 6 Macon 8 Coffee 5 Madison Colquitt Marion Columbia 0 McDuffie 8 Cook Meriwether Coweta Miller 9 Crisp 5 Mitchell Dade Monroe Dawson Montgomery Decatur 7 Morgan DeKalb Newton Dodge 8 Oconee Dooly 0 Oglethorpe Dougherty Paulding Douglas 5 Peach Early Pickens Echols 7 Pierce 0 Effingham 8 Polk Emanuel Pulaski 9 Evans 7 Quitman Fayette 5 Rabun Floyd 8 Randolph Forsyth 0 Richmond 5 Fulton 7 Rockdale 7 6

13 County Samples County Samples Schley Walker Screven 6 Walton 6 Seminole Ware Spalding Washington Stephens Wayne 5 Sumter Webster 7 Tattnall 7 Wheeler 5 Telfair White Tift Wilcox 5 Troup Worth Turner NA* Union * Samples were submitted without indicating a county of origin. 7

14 Summary of Diagnoses by Crop Field Crops (Total Diagnoses: ; H = 5) Diagnostic Responsibilities: Tifton Clinic: Tobacco, Corn, Cotton, Soybean, Peanut Athens Clinic: Homeowner samples Host Disease Causal Organism Samples Alecia, Hay Rust C = Alfalfa C = Wilt Crown and Stem Rot Crown and Stem Rot Undetermined Sclerotinia sp. Sclerotinia trifoliorum Amaranth C = Bahia Grass C = H = Bermuda, Hay C = Clover C = H = Corn C = Cotton C = Fescue, Tall C = Grain, Small C = Millet C = Oat C = 5 Head Blight Anthracnose Black/Sooty Blotch Southern Corn Leaf Blight Southern Rust Ear Rot Smut Rhizoctonia Soreshin Fusarium Wilt Rust Fusarium sp. Colletotrichum sp. Helminthosporium sp. Sclerotinia sp. Helminthosporium sp. Colletotrichum sp. Bipolaris maydis Puccinia polysora Fusarium sp. Ustilago maydis Helminthosporium sp. Rhizoctonia solani Fusarium sp. Stemphylium sp. Alternaria sp. Bipolaris sp. Powdery Mildew Pyricularia sp. Barley Yellow Dwarf 6 7 8

15 Host Disease Causal Organism Samples Peanut C = 5 Rye C = Sorghum C = Soybean C = 70 H = Tobacco C = Wheat C = 5 Crown Rot Leaf Scorch Limb Rot Early Late Funky Collar Rot White Mold Cylindrocladium Black Rot Nematode Damage Aspergillus sp. Leptosphaerulina crassiasca Cercospora arachidicola Cercosporidium personatum Tomato Spotted Wilt Diplodia sp. Sclerotium rolfsii Cylindrocladium crotalariae Meloidogyne sp. Neocosmospora sp. Rhizoctonia solani Gray Charcoal Rot Rust Bacterial Disease Downy Mildew Stem Blight Wilt Stem Canker/Lesion White Mold TDTD Collar Rot Brown Spot Black Shank Black Shank Race- Stem Rot Stalk Rot TDTD Cercospora sp. Macrophomina sp. Phakopsora pachyrhizi Peronospora manshurica Phomopsis sp. Fusarium sp. Phomopsis /Diaporthe sp. Sclerotium rolfsii Cercospora sp. Neocosmospora sp. Sclerotinia sclerotiorum Alternaria sp. Phytophthora nicotianae var. parasitica Phytophthora nicotianae var. parasitica Sclerotium rolfsii Erwinia sp. Tomato Spotted Wilt Tobacco Mosaic Rhizoctonia solani Pseudomonas sp Soil-Borne Wheat 9

16 Vegetables (Total Diagnoses: C = 0; H = 57) Diagnostic Responsibilities: Tifton Clinic: Commercial Athens Clinic: Homeowner Host Disease Causal Organism Samples Arugula C = Basil C = Stem and Leaf Blight Phytophthora sp. Bean, Lima C = H = Bean, Snap C = H = Cabbage C = 9 Cantaloupe C = 7 Carrot C = Collard C = 7 H = Corn, Sweet C = 8 H = Cucumber C = Ashy Stem Blight Cottony Leak /Blight TDTD Gummy Stem Blight Powdery Mildew Crown Decline Nematode Damage Downy Mildew Common Rust Purple Sheath Northern Corn Leaf Blight Undetermined Gummy Stem Blight Downy Mildew Phytophthora Blight TDTD Macrophomina phaseolina Bacterial Rhizoctonia solani Rhizoctonia solani Cold Injury Mycosphaerella citrullina Poty Rhizoctonia solani Possible Peronospora parasitica Alternaria sp. Puccinia sorghi Exserohilum turicum Cucumber Mosaic Mycosphaerella citrullina Pseudoperonospora cubensis Phytophthora capsici

17 Host Disease Causal Organism Samples Eggplant Anthracnose C = Phomopsis sp. Gourd Alternaria sp. C = Greens, Mustard Cercospora sp. C = H = Greens, Turnip Greens, Micro C = 7 H = Kale H = Okra C = Onion C = Parsley H = Pea C = H = TDTD TDTD Wilt Stem Lesion Leaf Blight Basal Plate Rot Sour Skin Neck Rot Bacteria Gemini Cercospora sp. Pythium and/or Phytophthora sp. Pythium and/or Possible Fusarium sp. Botrytis sp. Stemphylium sp. Fusarium sp. Burkholderia cepacia Botrytis sp. Botrytis allii Probable Pantoea sp. Probable Erwinia sp. TDTD Crown Rot Sclerotinia sclerotiorum Stems Stems Fusarium sp.

18 Host Disease Causal Organism Samples Pepper C = Fruit Rot H = 5 Potato, Irish C = H = Pumpkin H = Rape H = Spinach C = Squash C = 5 H = Tomato C = H = 7 Multiple Samples H = Stem Lesions Anthracnose Root and Stem Rot Roots 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 Phytophthora sp. Xanthomonas sp. Sunscald Bacterial Fusarium sp. Possible Erwinia sp. Blossom / Fruit Blight Choanephora sp. Crown Decline Pythium and/or Phytophthora Blight Downy Mildew Leaf Mold Early Blight (Possible) Blossom End Rot Cat Facing TDTD Insufficient Sample Cucumber Mosaic Squash Mosaic Cucumber Mosaic Phytophthora capsici Xanthomonas sp. Pseudoperonospora cubensis Fulvia fulva Alternaria sp. Xanthomonas campestris pv. vesicatoria Tomato Spotted Wilt Cucumber Mosaic Tobacco Mosaic Tomato Yellow Leaf Curl Xanthomonas sp. Herbicide Damage

19 Host Disease Causal Organism Samples Watermelon C = 5 H = Zucchini C = Gummy Stem Blight Fruit Blotch Fusarium Wilt (Probable) Nematode Damage Crown Decline Powdery Mildew Cottony Leak Insufficient Sample Mycosphaerella citrullina Acidovorax avenae subsp. citrulli Fusarium sp. Poty Meloidogyne sp. Fusarium sp. Erwinia sp. Rhizoctonia solani Downy Mildew Pseudoperonospora cubensis

20 Fruits and Nuts (Total Diagnoses: 5; H= 6) Diagnostic Responsibilities: Tifton Clinic: Commercial Nuts Athens Clinic: Fruit (Commercial and Homeowner), Homeowner Nuts Host Disease Causal Organism Samples Apple C = H = Blackberry C = 6 H = Blueberry C = 56 H = Cherry H = Citrus C = H = Fig H = Grape, Wine C = 5 H = Muscadine C = H = Peach C = H = Pear, Pineapple H = White Rot Bot Canker Galling Cane Blotch Fire Blight White Rot Cane & Leaf Rust Twig Blight Canker Xyellela (questionable) Botryosphaeria sp. Botryosphaeria sp. Botryosphaeria sp. Alternaria sp. Cephaleuros virescens Erwinia amylovora Kuehneola uredinis Tomato Ringspot Fusicoccum sp. Phomopsis sp. Sphaeropsis sp. Phytophthora sp. & Phytophthora sp. Phytophthora sp. Pythium & Phytophthora sp. Alternaria sp. Phyllosticta sp. Xyellela fastidiosa Shot Hole Blumeriella jaapii No Sample Sent Anthracnose Secondary Organisms Bitter Rot Brown Rot 5 5 Cercospora sp. Melanconium fuligineum Botrytis sp. Phytophthora sp. Monilinia fructicola

21 Host Disease Causal Organism Samples Pecan C = 5 Persimmon C = Plum H = Pomegranate C = H = Ribes H = Strawberry C = 9 Canker Shot Hole Fruit Rot Heart Rot Cercospora sp. Blumeriella jaapii Pestalotia sp. Crown Rot, Bacterial Root & Crown Rot Seedling & Basal Stem Rot Anthracnose (Possible) Mycosphaerella sp. Phytophthora sp. Phytophthora sp. Xanthomonas sp. Phomopsis sp. Botrytis sp. Phytophthora sp. 5

22 Herbaceous Ornamentals (Total Diagnoses: C = 87; H = 7) Diagnostic Responsibilities: Athens Clinic: All Samples (Commercial and Homeowner) Host Disease Causal Organism Samples Agapanthus Soft Rot, Bacterial Erwinia carotovora C = Agalinis C = H =0 Ajuga C = Crown & Crown Rot Phoma sp. Phoma sp. Amaryllis H = Argyranthemum Crown Gall Agrobacterium tumefaciens C = Acorus H = Begonia C = H = Bromeliad H = Cactus H = Calibrochoa C = Callicarpa C = Clematis H = Chrysanthemum C = 6 Coleus H = Dahlia C = Daylily C = H = Stem & Fusarium sp. Insufficient Sample Sooty Mold & Stem Rot Fusarium sp. Downy Mildew Peronospora sp. Stem Rot Crown Rot & Fusarium sp. 6

23 Host Disease Causal Organism Samples Euphorbia C = Fern C = H = Geranium C = Helleborus Crown Rot Phytophthora sp. C = Downy Mildew Peronospora pulveracea H = Cladosporium sp. Heuchera C = Hollyhock H = Hosta C = Houseplants, Misc. H = Impatiens C = 6 Iris C = H = Ivy C = H = 5 Kalanchoe C = Kale, Ornamental C = Liriope C = 7 H = Miscanthus H = & Phytophthora sp. Rust Puccinia malvacearum Anthracnose Colletotrichum sp. Tomato Spotted Wilt Hosta X Crown Rot Nematode Damage, Bacterial Anthracnose & Meloidogyne sp. Heterosporium iridis Tobacco Ringspot Poty Possible Xanthomonas campestris pv. hedera Colletotrichum sp. Phytophthora sp. Macrophoma sp. and Clamp Fungi Wire Stem Crown Rot Anthracnose Crown Rot Crown Rot Fusarium sp. Colletotrichum sp. Fusarium sp. & Phytophthora palmivora & Phytophthora sp

24 Host Disease Causal Organism Samples Mondo Grass Anthracnose Colletotrichum sp. C = Monkey Face H = Orchid C = Osteospermum C = Pachysandra H = Panicum C = Pansy C = 5 H = Penta C = Petunia C = H = Phlox C = Poinsettia C = Sansevieria C = Sarracenia C = Scaveola C = Schefflera H = Snapdragon C = H = Streptocarpus C = Tulip H = Crown & Fusarium sp. & Crown Rot Stem Lesion Volutella sp. Leaf Rust Puccinia sp. Crown & Stem Rot Black Blight Botrytis sp. Thielaviopsis sp. Phytophthora sp. Botrytis sp. & Stem Rot Phytophthora sp. Crown Rot Fusarium sp. Penicillium sp. & Phytophthora sp. Bacterial or Viral (Possible) Rust Puccinia sp. Botrytis sp. Penicillium sp. Cold Damage 8

25 Host Disease Causal Organism Samples Thrift Web Blight H = Verbena C = Vinca Black Thielaviopsis sp. C = Root & Stem Rot H = Zinnia H = Stem Rot Alternaria sp. Tomato Spotted Wilt 9

26 Trees (Total Diagnoses: C = 80; H= 8) Diagnostic responsibilities: Athens Clinic: All Samples (Commercial and Homeowner) Host Disease Causal Organism Samples Birch C = Cedar, Deodara C = Cherry H = Conifer H = Cordyline C = Crape Myrtle C = H = Cryptomeria C = 5 H = 6 Cypress, Leyland C = H = 8 Cupressus C = Dogwood H = Ehretia C = Fagus H = Ficus C = Hardwoods, Misc. H = Sooty Mold Twig Blight Bot Canker Secondary Organisms Canker Needle Blight Bot Canker Cercosporidium sp. Fusicoccum sp. Colletotrichum sp. Alternaria sp. Possible Seiridium or Bot Cercosporidium sp. Sphaeropsis sp. Heart/ and/or Slime Flux Corynespora sp. Algae Bacteria

27 Host Disease Causal Organism Samples Hemlock H = Magnolia Cephaleuros sp. C = 9 H = 5 Fusarium sp. Maple C = H = 5 Metasequoia C = Myrtle C = Oak C = 7 H = Palm C = H = Pear H = Pine C = 5 H = Poplar H = Prunus C = Redbud H = Algal Powdery Mildew Root & Stem Rot Tar Spot Anthracnose Bot Canker Transplant Shock Rhytisma sp. Bacterial Gloeosporium sp. Cristulariella sp. Sphaeropsis sp. Phytophthora sp. Coenocytic hyphae (Possible Oomycete) Charcoal Rot Macrophomina phaseoli Canker Canker Wetwood Sample Sent Forward Crown Rot Unable to Diagnose Endothiella sp. Nectria sp. Phyllosticta sp. Bacterial Cordyceps sp. Lightning Damage To Entomology Transplant Shock Phytophthora sp. & Algae Bacteria Air Pollution

28 Host Disease Causal Organism Samples Spruce Calonectria sp. H = Thuja C = 5 H = C = H = Vitex C = Yew H = Bot Canker Needle Blight Unable to Diagnose Botryosphaeria sp. Cercosporidium sp. Root & Crown Rot Phytophthora sp. &

29 Woody Ornamentals (Total Diagnoses: C = 8; H = 9) Diagnostic Responsibilities: Athens Clinic: All Samples (Commercial and Homeowner) Host Disease Causal Organism Samples Althea C = Arborvitae C = 5 H = Phytophthora sp. 5 Aucuba C = H = Azalea C = 5 H = 5 Barberry C = Bougainvillea H = Boxwood C = 8 H = 8 Camellia C = 8 Chamaecyparis H = Chionanthus H= Anthracnose Dieback Root Decline Powdery Mildew Anthracnose Anthracnose Botryosphaeria sp. & Phytophthora sp. Fungi Microsphaera azaleae Phytophthora sp. Colletotrichum sp. Gloeosporium sp. & Basidiomycete Cylindrocladium sp. TDTD Volutella Blight Boxwood Decline Bot Canker Anthracnose Dieback Leaf Gall Twig Blight Volutella buxi Phytophthora sp. & Phytophthora sp. Botryosphaeria sp. & Gloeosporium sp. Phyllosticta sp. Leptosphaeria sp. Exobasidium 5 7 Phomopsis sp. Slime Flux/Wetwood

30 Host Disease Causal Organism Samples Cleyera C = H = Daphne H = Duranta Slime Mold H = Elaeagnus Trunk Rot Phytophthora cactorum C = Euonymus C = H = Fatsia H = Fig, creeping C = Forsythia H = Fothergilla C = Gardenia H = Hibiscus C = Holly C = 9 H = Hydrangea C = 5 H = Slime Mold Sooty Mold Phytophthora sp. & Fusarium sp. Nematode Damage (Root Knot) Meloidogyne sp. Cercospora sp. Insufficient Sample Black Canker Canker Bot Canker Aerial Blight Algal Stem Rot Thielaviopsis sp. Colletotrichum sp. Phomopsis sp. Leptosphaeria sp. Pestalotia sp. Fusarium sp. Cercospora sp. & Phytophthora sp. & Fusarium sp.

31 Host Disease Causal Organism Samples Illicium Cercospora sp. C = Gloeosporium sp. Bot Canker Sphaeropsis sp. Jasmine C = H = Juniper C = 6 H = 6 Kolkwitzia C = Hypericum C = Lantana C = H = Laurel, Cherry H = Lavandula C = Leucothoe C = H = Ligustrum C = H = Loropetalum C = Mahonia C = Nandina C = Physocarpus C = Pieris C =, Bacterial Southern Blight Aerial Blight Twig Blight Canker (Possible) Possible Sclerotium rolfsii Possible Verticillium sp. & Phytophthora sp. Pestalotia sp. Black Nematode Damage Black Shot Hole Thielaviopsis sp. & Meloidogyne sp. Thielaviopsis basicola Scolytus rugulosus & Powdery Mildew Wood Rotting Fungi Sooty Mold Erysiphe vaccinii Cercospora sp. Armillaria sp. TDTD Stem & Cercospora sp. Black Thielaviopsis basicola & 5 5

32 Host Disease Causal Organism Samples Pittosporum Coenocytic hyphae (Possible Oomycete) C = Rhaphiolepis Entomosporium sp. C = Cercospora sp. H = & Phytophthora sp. Rhododendron C = H = Rose C = H = 9 Spirea H = Tea Olive C = H = Viburnum C = 6 H = TDTD Black Spot Wilt Downy Mildew Possible Armillaria Marssonina rosea Cercospora sp. Verticillium dahliae Phytophthora sp. Peronospora sparsa Alternaria sp. TDTD Transplant Shock & Phytophthora sp

33 Turf and Forage Grasses (Total Diagnoses: C = 00; H = 95) Diagnostic Responsibilities: Athens Clinic: All samples (Commercial and Homeowner) Host Disease Causal Organism Samples Bentgrass C = 80 Colletotrichum sp. Bermuda C = 88 H = Bluegrass H = Centipede C = 66 H = 57 Anthracnose (Basal Rot) ETRI ETRI Summer Patch Nematode Damage Sulfides/Anaerobic Conditions Brown Patch Large Patch Rust ETRI Take-all Dollar Spot SDS Bermuda Decline Rust Saprophyte Insufficient Sample TDTD Magnaporthe poae or GGG Magnaporthe sp. Algae GGG Suspect or Recommend Check Puccinia sp. GGG Sclerotinia homeocarpa Possible Puccinia cynodontis Helminthosporium sp. Bipolaris sp. Colletotrichum sp. Curvularia sp. Cladosporium sp. Sclerotinia homeocarpa ETRI Take-all Fairy Ring Large Patch ETRI Gray Anthracnose Fairy Ring Insufficient Sample TDTD GGG Possible Pyricularia sp. Colletotrichum sp. Curvularia sp. Colletotrichum sp. Bipolaris sp. Clamp Fungi

34 Host Disease Causal Organism Samples Fescue Brown Patch C = 8 ETRI H = Nematode Damage Grass C = H = 6 Greens C = 8 Lawn H = 7 Paspalum, Seashore C = 6 Ryegrass C = St. Augustine C = 50 H = 9 Sod C = Unable to Diagnose Rust Take-all Anthracnose Large Patch TDTD Summer Patch ETRI Nematode Damage Earth Stars Take-all Anthracnose Take-all Slime Mold Large Patch ETRI-mycelium Anthracnose Fairy Ring Unable to Determine Insufficient Sample Colletotrichum sp. Puccinia sp. GGG Gloeosporium sp. Curvularia sp. Magnaporthe poae Colletotrichum sp. Gasteromycetes GGG Drechslera sp. Clamp Fungi GGG Curvularia sp. Bipolaris sp. 8 7 GGG Colletotrichum sp. Curvularia sp. Bipolaris sp. Drechslera sp. Fungal mass Basidiomycete 8

35 Host Disease Causal Organism Samples Turf Large Patch C = Take-all H = 9 H = Zoysia C = 57 H = 7 Nematode Damage Take-all Large Patch Rust Take-all ETRI Fairy Ring Insufficient Sample TDTD GGG Curvularia sp. Suspect GGG Curvularia sp. Puccinia zoysia GGG Bipolaris sp. Curvularia sp. Colletotrichum sp. Rhizoctonia solani Clamp Fungi Stress Fungi

36 Miscellaneous (Total Diagnoses: C = 7; H = 8) Host Disease Causal Organism Samples Fungal ID C = H = Conk Mushroom ID of Fungi on Soil Surface Wood Rot Fungi Fuligo septica Chromelosporium sp. Misc. C = 6 H = Plant ID H = Various Cuttings Wood TDTD Plant ID Plant ID Cold/Drought Stress Insect Galls Stemonitis sp. Cercospora sp. Zoysia sp. Sida rhombifolia 0

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40 extension.uga.edu/publications Special Bulletin 6 Reviewed September 0 The University of Georgia and Fort Valley State University, the U.S. Department of Agriculture and counties of the state cooperating. UGA Extension offers educational programs, assistance and materials to all people without regard to race, color, national origin, age, gender or disability. The University of Georgia is committed to principles of equal opportunity and affirmative action.