Disease Resistance Codes

Some tomato varieties are developed to be resistant to certain diseases and pests. Codes may be listed with the tomato information. Here is a list of some codes that you may see. For more details about some that may apply to our area, see the article Decoding Tomato Disease Resistance Codes.

AB – Alternarium Blight

A or AS – Alternarium Stem Canker

CRR – Corky Root Rot

EB – Early Blight

F – Fusarium Wilt

FF – Fusarium races 1 & 2

FFF – races 1, 2, & 3

FOR – Fusarium Crown and Root Rot

GLS – Gray Leaf Spot

LB – Late Blight

LM – Leaf Mold

N – Nematodes

PM – Powdery Mildew

S – Stemphylium Gray Leaf Spot

T or TMV – Tobacco Mosaic Virus

ToMV – Tomato Mosaic Virus

TSWV – Tomato Spotted Wilt Virus

V – Verticillium Wilt Virus