Resistances keys

Out of courtesy to its website visitors, Vilmorin-Mikado offers a list of pest organism Codes. The purpose of this section is to clarify the different codes by crop. It is intended for professional users. Vilmorin shall not be held liable for any reason regarding the information provided in this section.

Carrot
Abbreviation	Pathogen	Disease
Ad	Alternaria dauci	Late leaf blight
Ay	Aster yellow	Aster yellow
Cc	Cercospora carotae	Early leaf blight, Cercospora leaf spot
Ps	Pythium sulcatum	Cavity spot
Pv	Pythium Violae	Cavity spot
Eh	Erysiphe heraclei	Powdery mildew
Xhc	Xanthomonas ortorum pv. Carotae (ex Xanthomonas campestris pv. Carotae)	Leaf spots, Bacterial blight
Onion
Abbreviation	Pathogen	Disease
Pt	Pyrenochaeta terrestris	Pink root
Cucurbit
Abbreviation	Pathogen	Disease
Co	Colletotrichum orbiculare (ex Colletotrichum lagenarium)	Anthracnose
Fom	Fusarium oxysporum f. sp. melonis	Fusarium wilt
Fon	Fusarium oxysporum f. sp. niveum	Fusarium wilt
Gc	Golovinomyces cichoracearum (ex Erysiphe cichoracearum)	Powdery mildew
Px	Podosphaera Xanthii (ex Sphaerotheca fuliginea)	Powdery mildew
Vd	Verticillium dahliae	Verticillium wilt
CMV	Cucumber Mosaic Virus	Cucumber mosaic
WMV	Watermelon Mosaic Virus	Watermelon mosaic
ZYMV	Zucchini Yellow Mosaic Virus	Zucchini yellows
Lettuce
Abbreviation	Pathogen	Disease
BI	Bremia lactucae	Downy mildew
Fol	Fusarium oxysporum f.sp lactucae	Fusarium wilt
Nr	Fusariosi della lattuga	Lettuce leaf aphid
Solanaceae
Abbreviation	Pathogen	Disease
Fol	Fusarium oxysporum f. sp. lycipersici	Fusarium wilt
For	Fusarium oxysporum f. sp. radicis lycopersici	Fusarium crown and root rot
Ff	Fulvia fulva
M	Meloidogyne arenaria, M. incognita, M. javanica	Root-knot
Ma	Meloidogyne arenaria	Root-knot
Mi	Meloidogyne incognita	Root-knot
Mj	Meloidogyne javanica	Root-knot
Pc	Phytophthora capsici	Phytophtora blight, Buckeye fruit and root rot
PI	Pyrenochaeta lycopersici	Corky root rot
PMMoV	Pepper mild mottle virus	Pepper mottle
Pst	Pseudomonas syringae pv. tomato	Bacterial speck
PVY	Potato Y virus	Potato Virus Y
S	Stemphylium floridanum, S. solani, S. botryosum f. sp. lycopersici	Leaf spot disease
Sbl	S. botryosum f. sp. lycopersici	Leaf spot disease
Sl	Stemphylium lycopersici	Leaf spot disease
Ss	Stemphylium solani	Leaf spot disease
Tm (TMV)	Tobacco Mosaic Virus	Tomato mosaic / Tobacco mosaic / Pepper mild mottle
ToMV	Tomato Mosaic Virus	Tomato mosaic
TSWV	Tomato Spotted Wilt Virus	Tomato spotted wilt
TYLCV	Tomato Yellow Leaf Curl Virus	Tomato Yellow Leaf Curl
V	Verticillium dahliae, Verticillium albo-atrum	Verticillium wilt
Va	Verticillium albo-atrum	Verticillium wilt
Vd	Verticillium dahliae	Verticillium wilt
Radish
Abbreviation	Pathogen	Disease
Ac	Albugo candida	White rust, White blister
For	Fusarium oxysporum f. sp. raphani	Yellows/ damping off
Pp	Peronospora parasitica	Downy mildew

Disease resistance :

Resistance is the ability of a variety to restrict the growth and development of a specified pest or pathogen and/or the damage it causes when compared to susceptible plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or pathogen pressure.

Two levels of resistance are defined:

High/standard resistance (HR) : plant varieties that highly restrict the growth and development of the specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest or pathogen pressure.
Moderate/intermediate resistance (IR) : plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to HR varieties. IR varieties will still show less severe symptoms or damage than susceptible varieties when grown under similar environmental conditions and/or pest or pathogen pressure.