Disease Resistant Codes

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This page talks about disease resistant codes.  You get a pack of seeds and there are weird letters and numbers on it.  What do they mean?

Here we list as many codes as we can find and tell you the meaning of them.

First of all there are two levels of resistance commonly used:

HR = High Resistance which means your plants are less likely to contract the disease.

IR = Intermediate Resistance--which means there is a chance your plants will get the disease.

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 7BLS 8 | Race 8BLS 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 1–3DM 1–7   | Races 1–7DM 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 0–2TM 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)

As you can see there are many diseases your plants can get.  Many of thes can be prevented or the damage they produce lessened by using an organic fungicide and a pesticide combination.  There are many on Amazon.

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