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.

Ilema

Active

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

Henk Driessen

2 records

Jakady

Application submitted

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

IBARRAKO

Active

Capsicum annuum L. · Bell pepper

NEIKER-INSTITUTO VASCO DE INVESTIGACIÓN Y DESARROLLO AGRARIO, S.A.

2 records

HONOLULU

Application submitted

Cucumis melo L. · Melon

SEMILLAS FITO, S.A.

1 record

HAWAI

Application submitted

Cucumis melo L. · Melon

RAMIRO ARNEDO, S.A.

1 record

Hrand

Application submitted

Sorghum bicolor (L.) Moench · Sorghum

Shevchenko Tetiana Anatoliivna, Samoilenko Anatolii Terentiiovych,

2 records

Groseille raisin

Active

Ribes L. · Currants

SMIDT (DE)

1 record

Hallertauer Merkur

Terminated

Humulus lupulus L. · Common hop

Herbert Ehrmaier

1 record

Hanzade F1

Withdrawn

Cucumis melo L. · Melon

Ahmet Oktay Turhan

2 records

Godric

Application submitted

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

Groene Hangers

Application submitted

Vicia faba L. · Broad bean

Frisian Seeds B.V.

1 record

Geneva 202

Active

Malus Mill. · Apple

Information not available - Contact NL authorities

1 record

Gracy

Application submitted

Cucumis melo L. · Melon

Nunhems Netherlands B.V.

1 record

Granite

Terminated

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

Paul Degreef

2 records

Geneva 16

Active

Malus Mill. · Apple

Information not available - Contact NL authorities

1 record

GENADIX 6

Terminated

Prunus persica (L.) Batsch · Peach

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

1 record

GK OErzse

Terminated

Triticum aestivum L. · Bread wheat

Barabas Zoltan / Kertesz Zoltan / Matuz Janos / Paradi Laszlo / Beke Bela / Schulz Jozsefne / Bona Lajos / Csoesz Laszlone

1 record

G 38

Terminated

Zea mays L. subsp. mays (Maize Group) · Maize

FUNK SEED

1 record

Gisela 6

Active

Prunus cerasus L. · Sour cherry

Prof. Dr. Werner Gruppe (DE)/Prof. Dr. Hanna Schmidt (DE)

2 records

FSG408DP

Active

Medicago sativa L. nothosubsp. varia (Martyn) Arcang. · Bastard Medic

Mike Velde

1 record

Geisha Girl GOF

Terminated

Calendula officinalis L. · Pot marigold

PlantiCo Hodowla i Nasiennictwo Ogrodnicze Golebiew sp. z o.o.

1 record

Geneva 30

Active

Malus Mill. · Apple

Information not available - Contact NL authorities

1 record

GARIO

Active

Vicia narbonensis L. · French vetch

ITACYL (CASTILLA Y LEON)

2 records

G 550

Terminated

Sorghum bicolor (L.) Moench subsp. bicolor · Sorghum

FUNK SEED

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.