Pests
Aphididae
Aphids are sap-sucking pests that cause leaf deformation, stunted plant growth, and reduced productivity. They also act as vectors for viral infections and facilitate the growth of sooty mold on the honeydew they secrete.
Mentioned in descriptions 6 810 varieties reference book.
Aphids are small sap-sucking pests that deplete plant cell sap during feeding, inhibiting photosynthesis and protein synthesis. Infestation manifests as leaf curling and deformation, the appearance of galls, premature leaf drop, and general suppression of shoots. The pest is diagnosed by colonies on the underside of leaves, the presence of a sticky honeydew coating, and ant activity.
Varietal resistance to aphids is classified as high (HR), which restricts pest development, or intermediate (IR), which can manage infestation under moderate pressure. The effectiveness of varietal protection depends on the type of mechanisms: vertical, which provides specific immunity to certain races, or horizontal, which creates general buffer resistance through the plant's physiological and biochemical properties.
Resistance assessment is a dynamic characteristic, as pests evolve by overcoming race-specific resistance genes. To maintain stability, agronomists apply the rotation of varieties with different resistance genes and combine their use in mixtures, avoiding monoculture with identical characteristics on the same land areas over long periods.
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.
Malus Mill. · Apple
Information not available - Contact NL authorities
Cucumis melo L. · Melon
Sakata Vegetables Europe SAS (FR)
Zea mays L. subsp. mays (Maize Group) · Maize
EURALIS GENETIQUE
Cucumis melo L. · Melon
SEMILLAS FITO, S.A.
Lactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
Lactuca sativa L. · Lettuce
Rijk Zwaan France SARL (FR)
Zea mays L. subsp. mays (Maize Group) · Maize
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Prunus persica (L.) Batsch · Peach
Jean-Louis Escande (FR)
Rosa L. · Rose
Dzidra Rieksta
Lactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
Zea mays L. subsp. mays (Maize Group) · Maize
Dekalb Genetics Corporation (usa) (US)
Malus pumila L. Mill. · Paradise apple
INCONNU (FR)
Pyrus L. · Pear
Lyle A. Brooks
Cucumis melo L. · Melon
Seminis Vegetable Seeds
Lactuca sativa L. var. crispa L. · Leaf lettuce
Kornelius Reinink
Lactuca sativa L. var. longifolia Lam. · Romaine lettuce
Kornelius Reinink
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Zavertaliuk Volodymyr Filimonovych, Polivoda Lidiia Ivanivna, Sydorka Inna Vasylivna, Sych Zenovii Deonyzovych,
Lactuca sativa L. var. crispa L. · Leaf lettuce
Bas Brussaart, Johan Schut,
Lactuca sativa L. · Lettuce
MERIDIEM SEEDS S.L.
Lactuca sativa L. · Lettuce
RAMIRO ARNEDO, S.A.
Lactuca sativa L. · Lettuce
RAMIRO ARNEDO, S.A.
Zea mays L. subsp. mays (Maize Group) · Maize
LES GOURGUES-G-CARGILL
Lactuca sativa L. · Lettuce
Nunhems B.V.
Cucumis melo L. · Melon
SEMILLAS FITO, S.A.