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 Leaf lettuce 13 Maize 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.

Heartbreaker

Active

Veronica L. · Speedwell

JOH. VAN NIEKERK

2 records

FLOGB0060

Active

Gaillardia aristata Pursh · Blanketflower

Loonen Rik Petrus Louis

2 records

Hallertau Blanc

Active

Humulus lupulus L. · Common hop

Anton Lutz

2 records

Innpetita

Terminated

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

Silvia Hofmann|SUSANNE HERDEGEN

2 records

Glen Doll

Active

Rubus idaeus L. · Red raspberry

The James Hutton Institute, Dundee, DD2 5DA

3 records

Duealgo

Active

Calibrachoa Cerv. · Calibrachoa

Tobias Dümmen

2 records

Gold Heart

Terminated

Lamprocapnos spectabilis (L.) Fukuhara · Asian bleeding-heart

Pope, Nori

2 records

Delgas

Active

Populus deltoides W. Bartram ex Marshall · Eastern cottonwood

Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE) , Institut National de Recherche en Sciences et Technologies pour l’Environnement et l’Agriculture (IRSTEA), Institut Technologique FCBA

2 records

Dema

Protection expired

Malva L. · Mallow

Dick Degenhardt

2 records

Frozen Flame

Active

Veronica L. · Speedwell

van Niekerk Johan|Waddinxveen, NL

3 records

Fidostlemimp

Active

Osteospermum L. x Dimorphotheca Vaill. ex Moench

Fides B.V.

2 records

FLORAUBBWB

Active

Aubrieta deltoidea (L.) DC.

Florensis B.V.

2 records

Duealbusky

Active

Calibrachoa Cerv. · Calibrachoa

Tobias Dümmen

2 records

Chojnow

Active

Lonicera periclymenum L. · Woodbine

Szczepan Marczyński

2 records

Devon Pearl

Protection expired

Dianthus L. · Carnation

H.R. WHETMAN & SON

2 records

Devon Arctic Star

Active

Dianthus L. · Carnation

H.R. WHETMAN & SON

2 records

Dellinois

Active

Populus deltoides W. Bartram ex Marshall · Eastern cottonwood

2 records

Danpethap

Terminated

Petunia Juss. · Petunia

Gavriel Danziger

2 records

Burgandy

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

2 records

Balcherissam

Active

Erysimum linifolium (Pers.) J. Gay · Wallflower

Trees Scott C

4 records

BF08

Active

Fuchsia L. · Fuchsia

Fred Hendriks

2 records

Catharina

Active

Echinacea purpurea (L.) Moench · Purple coneflower

van der Meer Cornelis|Rijpwetering, NL

2 records

BRFU 07951

Active

Fuchsia L. · Fuchsia

Hubert Brandkamp

2 records

Anselmo

Active

Eucalyptus globulus Labill. · Tasmanian blue gum

Grupo Empresarial Ence S.A.

2 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.