Plant Disease Resistance Codes
An alphabetical list of disease code acronyms used on our website and in our catalog.
HR = High Resistance IR = Intermediate Resistance
- A | Anthracnose | Fungus
- Colletotrichum lindemuthianum (Bean)
- C. orbiculare (Cucurbitaceae)
- AB | Alternaria Blight | Fungus | Alternaria dauci (Carrot) [See EB for Alternaria Blight of Tomato]
- ALS | Angular Leaf Spot | Bacterium | Pseudomonas syringae pv. lachrymans (Cucumber)
- AS | Alternaria Stem Canker | Fungus | Alternaria alternata f. sp. lycopersici (Tomato)
- B | Bacterial Wilt | Bacterium | Erwinia tracheiphila (Cucumber)
- BB | Bacterial Blight | Bacterium | Xanthomonas hortorum pv. carotae (Carrot)
- BBS | Bacterial Brown Spot | Bacterium | Pseudomonas syringae pv. syringae (Bean)
- BLS | Bacterial Leaf Spot | Xanthomonas campestris pv. vesicatoria (Pepper)
- BLS 1, 2 | Races 1 & 2
- BLS 1–3 | Races 1–3
- BLS 7 | Race 7
- BLS 8 | Race 8
- BLS 1–10 | Races 1–10
- BMV | Bean Mosaic Virus (Bean)
- BO | Botrytis Blights/Rots of Onion | Fungus | Botrytis allii (Onion)
- BR | Black Rot | Bacterium | Xanthomonas campestris pv. campestris (Brassicaceae)
- BS | Black Speck | Fungus | Rhizoctonia ssp
- C | Cercospora Blight | Fungus | Cercospora carotae (Carrot)
- CMV | Cucumber Mosaic Virus (Cucurbitaceae)
- CR | Club Root | Fungus | Plasmodiophora brassicae (Cabbage)
- CRR | Corky Root Rot | Fungus | Pyrenochaeta lycopersici (Tomato)
- CS | Cavity Spot | Water Mold| Pythium spp. (Carrot)
- CTM | Curly Top Beet Mosaic Virus (Beet)
- Cv | Cladosporium Leaf Spot | Fungus | Cladosporium variabile (Spinach)
- CVYV | Cucumber Vein Yellowing Virus (Cucumber)
- DM | Downy Mildew | Water Mold
- Bremia lactucae (Lettuce)
- Hyaloperonospora parasitica (Arugula)
- H. brassicae (Broccoli, Cabbage, Chinese Cabbage)
- Peronospora belbahrii (Basil)
- P. destructor (Onion)
- P. effusa (Spinach)
- P. viciae (Pea)
- Pseudoperonospora cubensis (Cucumber)
- DM 1–3 | Races 1–3
- DM 1–7 | Races 1–7
- DM 1–10 | Races 1–10
- DM 1–11 | Races 1–11
- DM 1–26 | Races 1–26
- EB | Early Blight (Alternaria Blight) | Fungus | Alternaria solani (Tomato)
- F | Fusarium Wilt | Fungus
- Fusarium oxyporum f. sp. lycopersici (Tomato)
- F. oxysporum f. sp. melonis (Melon)
- F. oxysporum f. sp. niveum (Watermelon)
- F. oxysporum f. sp. pisi (Pea)
- F | Race 1
- F2 | Races 1 & 2
- F3 | Races 0, 1 & 2
- FBR | Fusarium Basal Rot | Fungus | Fusarium oxysporum f. sp. cepae (Onion)
- FOR | Fusarium Crown and Root Rot | Fungus | Fusarium oxysporum f. sp. radicis–lycopersici (Tomato)
- FY | Fusarium Yellows | Fungus | Fusarium oxysporum f. sp. conglutinans (Brassicaceae)
- FW | Fusarium Wilt of Basil | Fungus | F. oxysporum f. sp. basilicum (Basil)
- GLS | Gray Leaf Spot | Fungus | Stemphylium solani (Tomato)
- HB | Halo Blight | Bacterium | Pseudomonas savastanoi pv. phaseolicola (Bean)
- LB | Late Blight | Water Mold | Phytophthora infestans (Tomato)
- LM | Leaf Mold | Fungus | Cladosporium fulvum aka Fulvia fulva (Tomato)
- LMV | Lettuce Mosaic Virus (Lettuce)
- MDMV | Maize Dwarf Mosaic Virus (Corn)
- MT0-10 | Indicates seeds have been tested for Lettuce Mosaic Virus, and that none was found in a sample of 10,000 seeds or more.
- MT0-30 | Indicates seeds have been tested for Lettuce Mosaic Virus, and that none was found in a sample of 30,000 seeds or more.
- N | Roundworm | Nematode | Meloidogyne arenaria, M. incognita, M. javanica (Tomato)
- NCLB | Northern Corn Leaf Blight | Fungus | Exserohilum turcicum (Corn)
- Nr | Lettuce Leaf Aphid | Insect | Nasonovia ribisnigri (Lettuce)
- Pb | Lettuce Root Aphid | Insect | Pemphigus bursarius (Lettuce)
- PC | Phytophthora Root Rot | Water Mold | Phytophthora capsici (Pepper)
- PEMV | Pea Enation Mosaic Virus (Pea)
- PLR | Pea Leaf Roll Virus (Pea)
- PM | Powdery Mildew | Fungus
- Erisyphe heraclei or Leveillula taurica (Carrot)
- Erisyphe pisi (Peas)
- E. polygoni (Beans)
- Oidium neolycopersici (Tomato)
- Podosphaera xanthii (Cucurbitaceae)
- PR | Pink Root | Fungus | Phoma terrestris (Onion)
- PRSV | Papaya Ringspot Virus (Curcubitaceae)
- PU | Purple Blotch | Fungus | Alternaria porri (Leek)
- PVY | Potato Virus Y (Pepper)
- R | Common Rust | Fungus
- Puccinia allii (Leek)
- P. asparagi (Asparagus)
- P. sorghi (Corn)
- Uromyces appendiculatus (Bean)
- Rs | Corky Root | Bacterium | Rhizomonas suberifaciens (Lettuce)
- S | Scab | Fungus | Cladosporium cucumerinum (Cucumber)
- SCLB | Southern Corn Leaf Blight | Fungus | Bipolaris maydis (Corn)
- SW | Stewart's Wilt | Bacterium | Pantoea stewartii (Corn)
- TBSV | Tomato Bushy Stunt Virus (Lettuce Dieback Complex [Lettuce])
- TEV | Tobacco Etch Virus (Pepper)
- TM | Tobamovirus
- TM 0 | Race 0 (Pepper)
- TM 0-3 | Races 0–3 (Pepper)
- TMV | Tobacco Mosaic Virus (Solanaceae)
- ToANV | Tomato Apex Necrosis Virus (Tomato)
- ToMV | Tomato Mosaic Virus (Tomato)
- TSP | Target Spot | Fungus | Corynespora cassiicola (Cucumber)
- TSWV | Tomato Spotted Wilt Virus (Tomato)
- TYLCV | Tomato Yellow Leaf Curl Virus (Tomato)
- V | Verticillium Wilt | Fungus | Verticillium albo–atrum (Tomato)
- WMV | Watermelon Mosaic Virus (Cucurbitaceae)
- WR | White Rust | Water Mold
- Albugo occidentalis (Spinach)
- A spp. (Cabbage)
- WT | White Tip | Phytophthora porri (Spinach)
- ZYMV | Zucchini Yellow Mosaic Virus (Cucurbitaceae)
New & Recently Revised
- 8 Great Vegetables for Beginner Gardeners • from Seed to Harvest • Article + VIDEOS
- About Johnny's • Printable 2-pp INFO SHEET (PDF)
- Adjustable Tool Bar • Assembly & Use • TECH SHEET (PDF)
- Baby Leaf Brassica Greens • KEY GROWING INFORMATION
- Baby Leaf Chicory • KEY GROWING INFORMATION
- Baby Leaf Greens & Baby Leaf Lettuce Production Guide • TECH SHEET (PDF)
- Baby Leaf & Microgreens Salad Mixes • SPEC SHEET (PDF)
- Baby Leaf Harvester for Greens, Mesclun, Spinach, Lettuces & Tender Aromatics • VIDEO
- Baby Leaf Harvester • Instruction Manual • (PDF)
- Common Pests & Diseases of Basil • TECH SHEET (PDF)
- Cover Crop Uses & Benefits • Printable
4-pp BROCHURE (PDF) - Cucumber Types & Terminology • TECH SHEET (PDF)
- Direct-Seeded Vegetable Crops • Seed Quantities Needed for Sowing & Average Yield per 100' Row/Acre • CHART (with PDF version available)
- Direct-Seeding Guidelines • How to Direct-Sow Your Seeds in the Garden or Field • ARTICLE (with PDF version available)
- Fast- & Slow-Growing Microgreens • COMPARISON CHART (PDF)
- Fundamentals of Tomato Grafting • Johnny's Educational Webinar Series • LEARNING RESOURCES
- 'Green Drops' (Panicum violaceum) • KEY GROWING INFORMATION
- Guidelines for Starting Seeds Indoors • Tips & Troubleshooting Advice for Starting Healthy Seedlings • ARTICLE (with PDF version available)
- How to Choose the Best Tomato • Which Varieties Fit Your Growing Needs? • ARTICLE
- Humidity Domes • DYNAMIC COMPARISON CHART (with PDF version available)
- Hydroponic & Container Basil Guide • Variety Selection Recommendations & Production Advice • ARTICLE (with PDF version available)
- Iceland Poppy • KEY GROWING INFORMATION
- Infinite Rolling Dibblers • COMPARISON CHART (PDF)
- Intro to Overwintering Flowers • Methods + Recommendations from Johnny's Multiyear Overwinter Flower Trials • ARTICLE
- Hydroponic & Container Basil • Faster-Growing, Slower-Growing & Specialty Varieties • COMPARISON CHARTS (with PDF version available)
- Johnny's 2021 Grower Profiles • Ingenuity + Inspiration Through a Year of Challenge & Change
- Johnny's 500' Drip Irrigation Kit • User Guide • (PDF)
- Johnny's 1000' Drip Irrigation Kit • User Guide • (PDF)
- Johnny's 2000' Drip Irrigation Kit • User Guide • (PDF)
- Johnny's Edible Flowers Guide • Printable 4-pp BROCHURE (PDF)
- Johnny's Edible Flower Variety Listing • Printable 2-pp Insert (PDF)
- Johnny's Hydroponics Information Guide • Printable 4-pp BROCHURE (PDF)
- Johnny's Hydroponic Variety Listing • Printable 2-pp Insert (PDF)
- Johnny's Hydroponic Lettuce • Printable 4-pp BROCHURE (PDF)
- Johnny's New-for-2021 Tools & Supplies • Printable 4-pp BROCHURE (PDF)
- Johnny's Organic Index • (PDF)
- Johnny's Patio Drip Irrigation Kit • User Guide • (PDF)
- Johnny's Pumpkin Types & Varieties • Printable 4-pp BROCHURE (PDF)
- Johnny's Top 10 New-for-2021 Organic Varieties • VIDEO
- Johnny's Top-10 New-for-2021 Varieties & Tools • VIDEO
- Johnny's Top 10 New-for-2021 Flowers • VIDEO
- Johnny's Welcomes Kevin L Cook, PhD as VP of R&D • Bringing Scientific Leadership & Oversight to Drive Innovation & Growth • PRESS RELEASE
- Nicotiana • KEY GROWING INFORMATION
- Microgreens • Planning, Cultural Methods, Harvesting & Marketing • Printable 4-pp BROCHURE (PDF)
- One-Cut Lettuce Varieties • How We Trial & Select the Best • Printable 2-pp INSERT (PDF)
- Overwinter Flower Trials • Results by Crop • WORKBOOK (XLSX)
- Overwinter Flower Trials • Seeding Date Calculator • WORKBOOK (XLSX)
- Overwintering Cut-Flowers • Johnny's Educational Webinar Series • LEARNING RESOURCES
- Paperpot Drop Seeder Plates • COMPARISON CHART (PDF)
- Planning & Plotting Your Market (or Backyard) Garden • An Intro to Johnny's Seed Quantity Calculators & Yield Charts • ARTICLE (with PDF version available)
- Plant Breeding at Johnny's • INFOGRAPHIC (with PDF version available)
- The Pronoca System • Guide & Specifications • Printable 4-pp BROCHURE (PDF)
- Seed-Starting at Johnny's Greenhouses • 3 Systems for Indoor Seed-Starting • ARTICLE (with PDF version available)
- Seed-Starting Flats • DYNAMIC COMPARISON CHART (with PDF version available)
- Seed-Starting Support Trays • DYNAMIC COMPARISON CHART (with PDF version available)
- Six-Row Seeder • 2nd Edition • Assembly & Use • TECH SHEET (PDF)
- Soil-block Making • A Better Way to Start Seedlings • ARTICLE by Eliot Coleman
- Salanova Lettuce • Variety & Collection Specifications • Printable 4-pp BROCHURE (PDF)
- 'Sonja' & 'Soraya' Branching Sunflowers • VIDEO
- Talinum paniculatum ('Jewels of Opar') • KEY GROWING INFORMATION
- Transplanted Vegetable Crops • Plant Quantity & Yield + Feet of Row per Acre • CHARTS (with PDF version available)
- 11 Things for Farming Elders & Their Beneficiaries to Know • About Medicaid Liens & Their Implications • ARTICLE by Jillian Hishaw, Esq.
- 2021 Floral Forecast • Johnny's Educational Webinar Series • LEARNING RESOURCES
- 4' LED Propagation Rack Kit • Assembly & Use • TECH SHEET (PDF)