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.

CARGIFARO

Terminated

Triticum aestivum L. · Bread wheat

LES GOURGUES-G-CARGILL

2 records

Cabella

Application submitted

Brassica oleracea L. (White Cabbage Group) · White cabbage

Sakata Seed Corporation, JP

1 record

CALLEJON

Active

Cucumis melo L. · Melon

SEMILLAS FITO, S.A.

1 record

Caspar

Terminated

Vicia faba L. var. equina St.-Amans · Horse bean

DLF B.V.

2 records

Canterbury

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

Bolero

Terminated

Tagetes patula L. · French marigold

Hodowla i Nasiennictwo Roślin Ogrodniczych Waganiec sp. z o.o.

1 record

Caicedo

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

2 records

Cadabra

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

Bemali

Terminated

Malus Mill. · Apple

Oldén, Elof J.

1 record

BRISTOL

Active

Cucumis melo L. · Melon

SEMILLAS FITO, S.A.

1 record

Biondina

Active

Lactuca sativa L. · Lettuce

Bejo Zaden B.V.

1 record

Aussigo

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

BAHAMAS

Application submitted

Cucumis melo L. · Melon

RAMIRO ARNEDO, S.A.

1 record

Arsenal

Terminated

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

Zavertaliuk Volodymyr Filimonovych, Kolesnyk Ivan Ivanovych, Sydorka Inna Vasylivna, Sych Zenovii Deonyzovych,

2 records

ANAYET

Active

Lactuca sativa L. · Lettuce

RAMIRO ARNEDO, S.A.

1 record

Arabat

Terminated

Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass

Shevchenko Tetiana Anatoliivna, Trotsenko Anatolii Hryhorovych, Samoilenko Valentyna Vasylivna, Samoilenko Anatolii Terentiiovych,

2 records

Andup

Terminated

Prunus persica (L.) Batsch · Peach

Frederic W. Anderson (US)

1 record

AGRISTER YG

Withdrawn

Zea mays L. · Maize

LIMAGRAIN EUROPE

2 records

AFICION RZ

Withdrawn

Lactuca sativa L. · Lettuce

RIJK ZWAAN Z.Z. B.V.

1 record

Alma Terra

Application submitted

Cucumis melo L. · Melon

KWS VEGETABLES B.V.

1 record

81-587

Active

Lactuca sativa L. var. crispa L. · Leaf lettuce

Kornelius Reinink

2 records

45-50 RZ

Active

Lactuca sativa L. · Lettuce

RIJK ZWAAN Z.Z. B.V.

1 record

45-193

Active

Lactuca sativa L. var. capitata L. · Head lettuce

Kees Reinink

1 record

ADV S6525

Application submitted

Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass

Advanta Seed International

1 record

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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.