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.

Nugauwhite

Active

Oenothera lindheimeri (Engelm. & A. Gray) W. L. Wagner & Hoch · Lindheimer's beeblossom

Graham N. Brown

4 records

Mandarin

Active

Lonicera L. · Honeysuckle

University of British Columbia

4 records

Keidepuses

Terminated

Petunia Juss. · Petunia

Suntory Flowers Limited, Chiyoda-ku, Tokyo

5 records

Balandrise

Active

Lantana camara L. · Lantana

LESLIE HEFFRON

4 records

Vulsini

Active

Lactuca sativa L. · Lettuce

Seminis Vegetable Seeds

5 records

Waikiki

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

6 records

Immensal

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

6 records

LG Caprice

Active

Hordeum vulgare L. · Barley

Limagrain Europe, FR

DK FR

4 records

ADVG 1329

Active

Sorghum bicolor (L.) Moench · Sorghum

Benjamin Beyer

RO UA

4 records

ADV F8322

Active

Sorghum bicolor (L.) Moench · Sorghum

Benjamin Beyer

RO UA

4 records

M 116

Active

Malus pumila L. Mill. · Paradise apple

EAST MALLING RESEARCH ST. (GB)

3 records

Ice Desert

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

7 records

Tull 303

Active

Veronica L. · Speedwell

TULLY NURSERIES

3 records

G 213

Active

Malus Mill. · Apple

HERBERT SANDERS ALDWINCKLE / JAMES CUMMINS / GENNARO FAZIO / TERENCE LEE ROBINSON

4 records

RAXINA 8

Active

Malus domestica (Suckow) Borkh. · Apple

INIA/SERIDA

2 records

RAXINA 30

Active

Malus domestica (Suckow) Borkh. · Apple

SERIDA

4 records

Lou 1

Active

Musa sikkimensis Kurz

Chauvet Bruno

3 records

G 814

Active

Malus domestica x Malus robusta · Apple

Herbert Aldwinckle^^^Gennaro Fazio^^^James Cummins^^^Terence L. Robinson

3 records

Annie's Blue

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Richard Lighty

3 records

Tatran

Active

Ribes rubrum L. · Redcurrant

CZ HU NL PL SK

13 records

Onyx

Active

Lactuca sativa L. · Lettuce

5 records

Mery

Active

Vicia sativa L. · Common vetch

BG IT

6 records

Trifecta

Active

Medicago sativa L. · Alfalfa

8 records

Autumn Treasure

Active

Rubus idaeus L. · Red raspberry

7 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.