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.

Multigreen 60

Active

Lactuca sativa L. · Lettuce

P.DEGREEF

9 records

Lea

Active

Lactuca sativa L. · Lettuce

ENZA ZADEN BEHEER B.V., NL

9 records

Ilema

Active

Lactuca sativa L. · Lettuce

ENZA ZADEN BEHEER B.V., NL

9 records

Exwatch

Active

Lactuca sativa L. · Lettuce

RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.

9 records

Elemental

Active

Lactuca sativa L. · Lettuce

NUNHEMS

15 records

Aquarius

Active

Medicago sativa L. · Alfalfa

NEW SOUTH WALES DEP.OF AGRIC.

12 records

Skye

Active

Rubus idaeus L. · Red raspberry

The James Hutton Institute, Dundee, DD2 5DA

6 records

Pallaton

Active

x Raphanobrassica spp.

FORAGE INNOVATIONS LTD

7 records

obf0604

Active

Vaccinium corymbosum L. · Highbush blueberry

Robert Gabriel

7 records

Reka

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

STRUBE HERMANN| Dr. Hermann Strube

CZ DE ES HR

5 records

Tulameen

Active

Rubus idaeus L. · Red raspberry

PACIFIC AGRI-FOOD RESEARCH CENTRE AGASSIZ

CZ FR HU NL

13 records

Retina

Active

Malus domestica (Suckow) Borkh. · Apple

Prof. Dr. Manfred Fischer / Heinz Murawski + im Institut für Obstforschung Dresden-Pillnitz / Prof. Dr. Christa Fischer

DE HU NL UA

9 records

Rumiloba

Active

Rubus idaeus L. · Red raspberry

Saatzucht Bauer Gmbh (DE)

DK FR NL SE

9 records

Dorise

Terminated

Dactylis glomerata L. · Cocksfoot

D.J.VAN DER HAVE

ES FR IT NL

5 records

Annisole

Active

Lactuca sativa L. · Lettuce

SYNGENTA SEEDS B.V.

7 records

Wellspur Delicious

Active

Malus domestica (Suckow) Borkh. · Apple

ES FR HU

6 records

Shangore

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds BV (NL)

FR HR NL

6 records

Helemus

Active

Brassica oleracea L. (Brussels Sprouts Group) · Brussels sprouts

Syngenta Seeds B.V.

CZ NL PL

5 records

GK Reka

Application submitted

Brassica napus var. napus · Rapeseed

Varga Jozsefne, Falusi Janos, Falusi Janosne,

HU UA

5 records

Caspar

Protection expired

Vicia faba L. · Broad bean

DLF SEEDS A/S

BE IE NL

7 records

Concorde

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

FR HU

6 records

Webber

Active

Lactuca sativa L. · Lettuce

RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.

9 records

Tuccadona

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

8 records

Tevion

Active

Lactuca sativa L. · Lettuce

Enza Zaden, NL

11 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.