HR = High Resistance IR = Intermediate Resistance
- A | Anthracnose | Fungus | Colletotricum lindemuthianum (Beans), C. orbiculare (Cucumber, Watermelon)
- AB | Early (Alternaria) Blight | Fungus | Alternaria dauci (Carrots); A. solani (Tomatoes)
- ALS | Angular Leaf Spot | Bacterium | Pseudomonas syringae pv. lachrymans
- AS | Alternaria Stem Canker | Fungus | Alternaria alternata f. sp. lycopersici
- B | Bacterial Wilt | Bacterium | Erwinia tracheiphila
- BB | Bacterial Blight | Bacterium | Xanthomonas carotae
- BBS | Bacterial Brown Spot | Bacterium | Pseudomonas syringae pv. syringae
-
BLS
| Bacterial Leaf Spot |
Xanthomonas campestris
pv.
vesicatoria
- BLS 1–3 | Races 1–3
- BLS 1, 2 | Races 1 & 2
- BLS 1–10 | Races 1–10
- BMV | Bean Mosaic Virus
- BR | Black Rot | Fungus | Didymella bryoniae
- BYMV | Bean Yellow Mosaic Virus
- C | Cercospora Blight | Fungus | Cercospora carotae
- CTM | Curly Top Beet Mosaic Virus
- CMV | Cucumber Mosaic Virus
- CS | Cavity Spot | Fungus | Pythium spp.
- CTM | Curly Top Beet Mosaic Virus
- Cv | Cladosporium Leaf Spot | Fungus | Cladosporium variabile
- CVYV | Cucumber Vein Yellowing Virus
-
DM
| Downy Mildew | Water Mold
- Bremia lactucae (Lettuce)
- Peronospora parasitica (Cabbage, Greens)
- P. farinosa f. sp. spinaceae (Spinach)
- Pseudoperonospora cubensis (Cucumber, Melon)
- E | Enation Mosaic Virus
-
F
| Fusarium Wilt | Fungus | Fusarium oxysporum (Peas); F. oxysporum f. sp. melonis (Melon)
- 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 (Cabbage)
- HB | Halo Blight | Bacterium | Pseudomonas savastanoi pv. phaseolicola
- L | Gray Leaf Spot | Fungus | Stemphylium solani
- LB | Late Blight | Water Mold | Phytophthora infestans
- LM | Leaf Mold | Fungus | Cladosporium fulvum
- LMV | Lettuce Mosaic Virus
- MDMV | Maize Dwarf Mosaic Virus
- 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
- NCLB | Northern Corn Leaf Blight | Fungus | Exserohilum turcicum
- Nr | Lettuce Leaf Aphid | Insect | Nasonovia ribisnigri
- Pb | Lettuce Root Aphid | Insect | Pemphigus bursarius
- PC | Phytophthora Root Rot | Water Mold | Phytophthora capsici
- PeMV | Pepper Mottle Virus
- PEMV | Pea Enation Mosaic Virus
- PL | Corky Root Rot | Fungus | Pyrenochaeta lycopersici
- PLR | Pea Leaf Roll Virus
-
PM
| Powdery Mildew | Fungus
- Erisyphe pisi (Peas)
- Oidium lycopersicum (Tomato)
- Podosphaera xanthii (Cucumber, Pumpkin, Squash)
- P. fuliginea (Melon)
- PR | Pink Root | Fungus | Phoma terrestris
- PRV | Papaya Ringspot Virus
- PST | Bacterial Speck | Bacterium | Pseudomonas syringae
- PVY | Potato Virus Y
- R | Common Rust | Fungus | Puccinia sorghi (Beans, Corn); P. asparagi (Asparagus)
- Rs | Corky Root | Bacterium | Rhizomonas suberifaciens
- S | Scab | Fungus | Cladosporium cucumerinum
- SCLB | Southern Corn Leaf Blight | Fungus | Bipolaris maydis
- SM | Smut | Fungus | Ustilago zeae
- SW | Stewart's Wilt | Bacterium | Pantoea stewartii
- TBSV | Tomato Bushy Stunt Virus (Lettuce Dieback Complex)
- TEV | Tomato Etch Virus
-
TM | Tobamovirus
- TM 0-2 | Races 0–2
- TM 0-3 | Races 0–3
- TMV | Tobacco Mosaic Virus
- ToANV | Tomato Apex Necrosis Virus
- ToMV | Tomato Mosaic Virus
- TSP | Target Spot | Fungus | Corynespora cassiicola
- TSWV | Tomato Spotted Wilt Virus
- TYLCV | Tomato Yellow Leaf Curl Virus
- V | Verticillium Wilt | Fungus | Verticillium albo–atrum
- WMV | Watermelon Mosaic Virus
- WMV | Watermelon Mosaic Virus
- ZYMV | Zucchini Yellow Mosaic Virus
New & Recently Revised
- Quick-Guide to Choosing a Seeder • How to Find the Right Precision Seeder for Your Small-Scale Growing Needs
- Foliage & Fillers • Farmer–Florists Share Their Favorites
- 3 Easy, Reliable, Productive Cut Flowers • Sunflowers, Rudbeckia & Zinnias
- Year-Round Micro Greens Production Guide • Planning, Sowing, Production, Harvesting & Marketing
- Greenhouse Varieties • How We Trial & Select Varieties for Protected Culture
- Top-15 Tomatoes for High Tunnel & Hoophouse Production • Diseases & Resistances to Look For, Plant Habit & Variety Recommendations
- Asian Greens • 10 Varieties + 5 Easy Recipes to Get You Started
- Greens for All Growers • A 3-Tiered Marketing Approach
-
Seed Variety Trials at Johnny's
- Why Try Something New
- How to Conduct Your Own Trial
-
Cover Crop Decision-Making
5 Steps for Deciding What to Plant, When & Where