Diseases
Viral mosaic diseases are a group of systemic infectious plant diseases manifesting in variegated leaf coloration, tissue deformation, and reduced productivity. These diseases are caused by various pathogens, spread by pests and through contact, and are virtually untreatable.
Mentioned in descriptions 22 022 varieties reference book.
Viral mosaic diseases are characterized by the appearance of alternating spots of different colors on plant organs, including light rings, star-shaped spots, or stripes. In addition to specific variegated coloration, affected plants often exhibit leaf blade curling, wrinkling, and crinkling, as well as stunted overall growth and deformation of fruits and flowers. Sometimes the infection is latent, where visual symptoms are absent, yet crop productivity is significantly reduced.
Pathogen dissemination occurs through vectors such as aphids, true bugs, mites, and nematodes, as well as through mechanical transfer of sap from diseased plants during care, pruning, or physical contact. Infection is possible via seeds, planting material, soil, and crop residues. The intensity of infection development depends on weather conditions, particularly temperature regimes, and crop density, which facilitates rapid virus transmission.
Varietal resistance to mosaics is determined by the presence of specific or recessive genes affecting translation initiation. During breeding and variety testing, resistance is evaluated under artificial inoculation on infectious disease plots. Modern diagnostics for controlling viral load include enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR), while field resistance is determined by a variety's ability to not accumulate the pathogen throughout the growing season.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Cucurbita pepo L. · Field pumpkin
Sokolova Viktoriia Konstiantynivna, Dymchenko Tetiana Mykolaivna, Muzhylko Viktor Valentynovych,
Lactuca sativa L. var. crispa L. · Leaf lettuce
John Pieter
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
BHN SEED RESEARCH
Solanum lycopersicum L. · Tomato
TEZIER
Capsicum annuum L. · Bell pepper
Piet de Vries
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Cucumis sativus L. · Cucumber
IBEROSEEDS COMPAÑIA IBERICA DE SEMILLAS, S.L.
Cucurbita maxima Duchesne · Giant pumpkin
HAZERA GENETICS
Phaseolus vulgaris L. · Common bean
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Cucumis sativus L. · Cucumber
Hary Bessels
Solanum lycopersicum L. · Tomato
Harmoniz
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
ASGROW SEED CO
Pisum sativum L. · Pea
MELZER INGE| Inge Melzer in Fa. Ruegensaaten GmbH, Gingst
Zea mays L. subsp. mays (Maize Group) · Maize
ASGROW SEED CO
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
Tom Natti
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Lactuca sativa L. var. capitata L. · Head lettuce
Ger Beemsterboer
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
Pop Vriend Seeds B.V.
Solanum lycopersicum L. · Tomato
May Agro Seed Corp.(TR)
Solanum lycopersicum L. · Tomato
Harmoniz
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Solanum lycopersicum L. var. lycopersicum · Tomato
ISI SEMENTI SPA