Resistance legend
ISF Resistance Definitions
Basil
Fob Fusarium oxysporum f.sp. basilici – Fusariosi del basilico
DM0 Peronospora belbahrii – Peronospora del basilico razza 0
DM1 Peronospora belbahrii – Peronospora del basilico razza 1
Carrot
Ad – Alternaria Dauci
Pm (Oidio) – Erysiphe heracleid
Cipolla
Pt – Pyrenochaeta terrestris (Radice rosa)
Setophoma terrestris
Watermelon
Fon Fusarium oxysporum f. sp. niveum – Tracheofusariosi
Co Colletotrichum orbiculare – Antracnosii
Lettuce
BL Bremia lactuce – Peronospora della lattuga
Nr Nasonovia ribisnigri – Afide della lattuga
Melon
Fom Fusarium oxysporum f. sp.melonis – Tracheofusariosi
Px Podosphaera xanthii (ex Sphaerothecafuliginea) – Oidio delle cucurbitacee
MNSV Virus della maculatura necrotica del melone
Pepper
PVY:0 – Potato Y virus
BPeMV – Bell pepper mottle virus
ObPV – Obuda pepper virus
PaMMV – Paprika mild mottle virus
PVY:0 – Potato Y virus
PMMoV – Pepper mild mottle virus
TM:0 – Tobamovirus (ToMV – Tomato mosaic virus, TMV – Tobacco mosaic virus, PMMoV – Pepper mild mottle virus)
TMGMV – Tobacco mild green mosaic virus
TSWV – Tomato spotted wilt virus
Pc – cancrena pedale del peperone
Tomato
Va Verticillium alboatrum – Verticillosi
Vd Verticillium dahliae – Verticillosi
Fol Fusarium oxysporum f. sp. lycopersici – Fusariosi
For Fusarium oxysporum f. sp. radicis | ycopersici – Fusarium radicis
Pf – Passalora fulva – Cladosporiosi
On – Golovinomyces lycopersici (ex Oidium lycopersici) – Oidio del pomodoro
SI Stemphylium lycopersici – Stemfiliosi
Pst Pseudomonas syringae pv. tomato – Batteriosi del pomodoro
Ma, Mi, Mj* Meloidogyne arenaria, Meloidogyne incognita, Meloidogyne yanica – Nematodi galligeni
ToMV Virus del mosaico del pomodoro
TSWV Virus dell’avvizzimento maculato del pomodoro
TYLCV Virus dell’accartocciamento fogliare giallo del pomodoro
ToBRFV – Tomato Brown Rugose Fruit Virus
Rootstocks
Bw Ralstonia solanacearum – Avvizzimento batterico
Fol Fusarium oxysporum f. sp. lycopersici — Fusariosi
Fon Fusarium oxysporum f. sp. niveum – Tracheofusariosi
Fom Fusarium oxysporum f.sp. melongenae – Fusariosi
For Fusarium oxysporum f. sp. radicis | ycopersici – Fusarium radicis
MNSV – Virus della maculatura necrotica del melone
N* Nematodi
Pc – Phytophthora capsici – cancrena pedale del peperone
PI Pyrenochaeta lycopersici – Radice suberosa
Vd Verticillium dahliae, Verticillium albo-atrum – Tracheoverticillosi
Terms used
Definition of terms used by the horticultural seed industry to describe the response of plants to harmful organisms, as well as to abiotic stresses
The relationship between a plant and a harmful organism is highly complex. The terms describing a plant variety's response to a harmful organism are determined through trials conducted under controlled environmental conditions, with known biotypes, pathotypes, races, and strains characteristic of the harmful organism in question. In practice, the ability of a harmful organism to cause disease in a plant depends on environmental conditions, the properties of the organism itself, and the plant's ability to defend itself. Within a given plant species, varieties may exhibit different defense capabilities. Depending on various conditions, such as the plant's age, the pressure and virulence of the harmful organism, or adverse environmental conditions, the interaction between the same plant and a harmful organism can lead to different outcomes. It is known that harmful organisms are capable of developing and forming new biotypes, pathotypes, races, or strains capable of damaging plants that are otherwise unaffected by the original form of the harmful organism. In order to ensure consistency in the terms used to describe a plant's response to a harmful plant organism, the ISF Vegetable and Ornamental Seeds Section has defined the following terminology.
Susceptibility: it is the inability of a plant variety to limit the growth and development of a specific harmful organism.
Resistence: It is the ability of a plant variety to limit the growth and development of a specific harmful organism and/or the damage it causes, compared to susceptible varieties placed under similar environmental conditions and pressure from the harmful organism. Resistant varieties may, however, show some symptoms of disease or damage under heavy pressure from a harmful organism.
Two levels of resistance are defined:
Resistenza elevata (HR): Variety capable of significantly limiting the growth and development of a specific harmful organism under normal conditions of infestation pressure, compared to susceptible varieties. These varieties may, however, exhibit some symptoms or damage under conditions of high pest pressure.
Resistenza intermendia (IR): Varieties capable of limiting the growth and development of a specific harmful organism, but which may exhibit a broader range of symptoms or damage compared to highly resistant varieties. Varieties with intermediate resistance will still exhibit less severe symptoms or damage than susceptible varieties when grown under similar environmental conditions and/or under the same pest pressure. It should be noted that if a variety is declared resistant, this resistance is limited to a specific biotype, pathotype, race, or strain of the harmful organism. If resistance is declared without specifying any biotype, pathotype, race, or strain, it means that there is no recognized classification for the harmful organism in question as a biotype, pathotype, race, or strain. New biotypes, pathotypes, races, or strains that may appear are not covered by the resistance originally declared.
Immunity: when a plant is not subject to attack or infection by a specific pest or harmful organism.
