Disease Resistance Codes

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
    • Colletotricum 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 1–3 | Races 1–3
    • BLS 1, 2 | Races 1 & 2
    • BLS 7 | Race 7
    • BLS 8 | Race 8
    • BLS 1–10 | Races 1–10
  • BMV | Bean Mosaic Virus (Bean)
  • BR | Black Rot | Bacterium | Xanthomonas campestris pv. campestris(Brassicaceae)
  • BS | Black Speck | Fungus | Rhizoctonia ssp
  • BYMV | Bean Yellow Mosaic Virus (Bean)
  • C | Cercospora Blight | Fungus | Cercospora carotae (Carrot)
  • CLS | Cercospora Leaf Spot of Beets | Fungus| Cercospora beticola (Beet)
  • CTM | Curly Top Beet Mosaic Virus (Beet)
  • 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, Chinese Cabbage)
    • Peronospora belbahrii (Basil)
    • P. parasitica (Broccoli, Cabbage, Greens)
    • P. farinosa f. sp. spinaceae (Spinach)
    • Pseudoperonospora cubensis (Cucumber, Melon)
    • 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
  • E | Enation Mosaic Virus
  • EB | Early Blight (Alternaria Blight) | Fungus | Alternaria solani (Tomato)
  • F | Fusarium Wilt | Fungus
    • Fusarium oxysporum (Pea)
    • F. oxyporum f. sp. lycopersici (Tomato)
    • F. oxysporum f. sp. melonis (Melon)
    • F. oxysporum f. sp. niveum (Watermelon)
    • 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 | Pepper Mottle Virus
  • 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)
    • Oidium lycopersicum (Tomato)
    • Podosphaera xanthii (Bean; Cucurbitaceae)
    • P. fuliginea (Melon)
  • PR | Pink Root | Fungus | Phoma terrestris (Onion)
  • PRSV | Papaya Ringspot Virus (Curcubitaceae)
  • PST | Bacterial Speck | Bacterium | Pseudomonas syringae
  • PVY | Potato Virus Y (Pepper)
  • R | Common Rust | Fungus
    • Puccinia sorghi (Corn)
    • P. asparagi (Asparagus)
    • 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)
  • SM | Smut | Fungus | Ustilago zeae (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 0-2 | Races 0–2
    • 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)
  • ZYMV | Zucchini Yellow Mosaic Virus (Cucurbitaceae)