Pests

Aphids

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.

Sources10

Breakdown by crop

Lettuce aphid 1 326 Melon Aphid on Melon 220 Apple Aphids 85 Apple Aphid 44 Aphids on Raspberry 43 Alfalfa Aphid 35 Aphids on soft wheat 16 Aphids on Lettuce 13 Aphids on Barley 13 Aphids on Paradise Apple 12 Sorghum aphid 11 Peach aphid 10 Aphid — Red Currant 10 Chrysanthemum aphid 10 Hop aphid on hops 9 Aphids on faba beans 9 Aphids on Faba Beans 9 Pea aphid on peas 9 Aphids on carrot 9 Aphids — White Cabbage 8 Aphid infestation of Canadian poplar 8 Black Cherry Aphid — Sour Cherry 7 Cabbage aphid on rapeseed 7 Aphids on Sugar Beet 7

Found in these crops

Lettuce 1 340 Melon 220 Apple 85 Apple 44 Red raspberry 41 Alfalfa 35 Bread wheat 17 Barley 14 Maize 13 Leaf lettuce 13 Paradise apple 12 Sorghum 11

Varieties that feature this in their description

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.

Ego

Protection expired

Pisum sativum L. · Pea

NOVARTIS SEEDS

2 records

Egery

Terminated

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

2 records

Ezuma

Terminated

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

4 records

Eztoril

Terminated

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

4 records

Elixir

Terminated

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

4 records

Exmond

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Elfo

Terminated

Cucumis melo L. · Melon

Syngenta Seeds B.V.

2 records

Durero

Active

Cucumis melo L. · Melon

TAKII EUROPE B V

2 records

Edgar

Active

Cucumis melo L. · Melon

Clause Tezier, FR

4 records

Edabriz

Active

Prunus avium (L.) L. · Sweet cherry

Francoise Dosba|Francoise Rastoin

2 records

Easala

Terminated

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

4 records

Escalibor

Active

Cucumis melo L. · Melon

Syngenta Seeds BV (NL)

2 records

Don Gregorio

Active

Cucumis melo L. · Melon

Sakata Vegetables Europe SAS (FR)

2 records

Encierro

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

2 records

Eluarde

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

2 records

Elodian

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

7 records

East Malling IX = M9

Active

Malus pumila L. Mill. · Paradise apple

EAST MALLING RESEARCH ST. (GB)

2 records

Edabriz

Active

Prunus L. · Plum

GRASSELY| Charles Grassely c/o I.N.R.A. - Station de RecherchesFruitieres Mediterraneennes / RASTOIN| Francoise Rastoin c/o C.T.I.F.L.

3 records

Efektna

Active

Triticum aestivum L. · Bread wheat

STARYCHENKO VASYL MYKOLAIOVYCH, SHTAKAL MYKOLA IVANOVYCH, KOVALCHUK SERHII OLEKSANDROVYCH, DAVYDIUK HANNA VOLODYMYRIVNA, HOLYK LIUBOV MYKOLAIVNA

3 records

Dulcemia

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

2 records

Dülmener Herbstrosenapfel

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

2 records

Delcaso

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

4 records

Dilago

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

3 records

Dicata

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

4 records

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Pests

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.