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Disease Resistance Abbreviation Key

Key to Resistance Information

R = Resistance. (The ability of a plant variety to highly restrict the activities of a specific pathogen or insect pest and/or to restrict the symptoms and signs of a disease, when compared to susceptible varieties. Resistant varieties may exhibit some symptoms when specified pathogen or pest pressure is severe. New and/or atypical strains of the specific pathogen or pest may overcome the resistance, sometimes completely.)

IR = Intermediate Resistance. (Varieties with an intermediate level of resistance to a specific pathogen or insect pest may perform substantially better than susceptible varieties when moderate to severe pathogen or pest pressure exists. These varieties may exhibit a great range of symptoms compared to resistant varieties when grown under similar conditions of moderate to sever pathogen or pest pressure.)

BEAN

  • A = Anthracnose (Colletotrichum lindemuthianum)
  • BBS = Bacterial brown spot (Pseudomonas syringae pv. syringae)
  • BCMV = Bean common mosaic (Bean common mosaic virus)
  • CBB = Common bacterial blight (Xanthomonas campestris pv. phaseoli)
  • CT = Curly Top
  • PSP = Halo blight (Pseudomonas syringae pv. phaseolicola)
  • R = Rust (Uromyces appendiculatus)
  • WM = White mold (Sclerotinia sclerotiorum)

BROCCOLI

  • DM = Downy mildew (Peronospora parasitica)

CABBAGE

  • FY = Fusarium yellows (Fusarium oxysporum f. sp. conglutinans)

CARROT

  • ALB = Alternaria leaf blight (Alternaria dauci)

CUCUMBER

  • A = Anthracnose (Colletotrichum orbiculare)
  • ALS = Angular leaf spot (Pseudomonas syringae pv. lachrymans)
  • CMV = Cucumber mosaic (Cucumber mosaic virus)
  • CVYV = Cucumber vein yellowing (Cucumber vein yellowing virus)
  • DM = Downy mildew (Pseudoperonospora cubensis)
  • PM = Powdery mildew (Sphaerotheca fuliginea)
  • PRSV = Papaya ringspot (Papaya ringspot virus)
  • Sc = Scab (Cladosporium cucumerinum)
  • TLS = Target spot (Corynespora cassiicola)
  • WMV = Watermelon mosaic (Watermelon mosaic virus)
  • ZYMV = Zucchini yellow mosaic (Zucchini yellow mosaic virus)

LETTUCE

  • BV = Big-vein (Lettuce big-vein)
  • CRR = Corky root (Rhizomonas suberifaciens)
  • DM = Downy mildew (Bremia lactucae)
  • LMV = Lettuce mosaic (Lettuce mosaic virus)

MELON

  • Fom = Fusarium wilt (Fusarium oxysporum f. sp. melonis)
  • PM = Powdery mildew (Sphaerotheca fuligineas)
  • S = Sulfur damage (Sulfur)

ONION

  • FBR = Basal rot (Fusarium oxysporum f. sp. cepae)
  • PRR = Pink root (Phoma terrestris)

PEA

  • BLRV = Pea leaf roll (Bean leaf roll virus)
  • BYMV = Pea mosaic (Bean yellow mosaic virus)
  • DM = Downy mildew (Peronospora viciae)
  • F = Wilt (usarium oxysporum f. sp. pisi)
  • PEMV = Pea enation mosaic (Pea enation mosaic virus)
  • PM = Powdery mildew (Erysiphe pisi)

PEPPER

  • BST-1,2,3,4,5 = Bacterial spot (Xanthomonas campestris pv. vesicatoria races 1-5)
  • PB = Phytophthora blight (Phytophthora capsici)
  • PeMV = Pepper mottle (Pepper mottle virus)
  • PVY 0 = Potato virus Y strain 0
  • TEV = Tobacco etch (Tobacco etch virus)
  • Tobamo P0 = Tobamovirus pathotype 0 (Tobamoviruses)
  • TSWV P0 = Tomato spotted wilt pathotype 0 (Tomato spotted wilt virus)

SPINACH

  • Pf = Downy mildew (Peronospora farinose f.sp. spinaciae)

SQUASH

  • CMV = Cucumber mosaic (Cucumber mosaic virus)
  • PM = Powdery mildew (Sphaerotheca fuliginea)
  • WMV = Watermelon mosaic (Watermelon mosaic virus)
  • ZYMV = Zucchini yellow mosaic (Zucchini yellow mosaic virus)

SWEET CORN

  • CCR = Common rust (Puccinia sorghi)
  • Rp1D = Common rust races controlled by Rp1D gene
  • CS = Common smut (Ustilago maydis)
  • MDMV = Maize dwarf mosaic (Maize dwarf mosaic virus)
  • NCLB = Northern corn leaf blight (Exserohilum turcicum)
  • SBW = Stewart's disease (bacterial wilt) – (Pantoea stewartii (Erwinia stewartii))
  • SCLB = Southern corn leaf blight and stalk rot (Bipolaris maydis)

TOMATO

  • ASC = Alternaria stem canker (Alternaria alternata f. sp. lycopersici)
  • BSK-0 = Bacterial speck (Pseudomonas syringae pv. tomato)
  • F-1,F-2,F-3 = Fusarium wilt (Fusarium oxysporum f. sp. lycopersici)
  • FCRR = Fusarium crown and root rot (Fusarium oxysporum f. sp. radicis-lycopersici)
  • GLS = Gray leaf spot (Stemphylium solani)
  • N = Southern root-knot nematode (Meloidogyne incognita, M. arenaria, M. javanica)
  • ToMV = Tomato mosaic (Tomato mosaic potyvirus)
  • TYLCV = Tomato yellow leaf curl (Tomato yellow leaf curl begomovirus)
  • V-1 = Verticillium wilt (Verticillium dahliae race 1)

WATERMELON

  • A-1 = Anthracnose (Colletotrichum lagenarium race 1)
  • F-0, F-1 = Fusarium wilt (Fusarium oxysporum f. sp. niveum races 0 and 1)