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.

Diskoa

Active

Lactuca sativa L. · Lettuce

VILMORIN, VILMORIN

7 records

Desirade

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

Cousteau

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

8 records

Constanza

Active

Lactuca sativa L. · Lettuce

Seminis Vegetable Seeds

6 records

Caravel

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

10 records

Canopy

Active

Malus domestica (Suckow) Borkh. · Apple

IFO SARL (FR)

5 records

Carlovia

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

Bacchus

Active

Lactuca sativa L. · Lettuce

Vilmorin, F

6 records

Besma

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

Binex

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

Balfieplos

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Uchneat Michael S.

5 records

Bateira

Active

Lactuca sativa L. · Lettuce

Nunhems B.V.

8 records

Alyssa

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

TAHI56

Active

Hibiscus moscheutos L. · Crimson-eyed rose mallow

Tan Alain

5 records

SAKIMP041

Active

Impatiens New Guinea Group · New Guinea Impatiens

SATO CHIHIRO|MINEMURA SHINJI

5 records

Moutere

Active

Rubus idaeus L. · Red raspberry

The New Zealand Institute for Plant and Food Research

6 records

Glen Carron

Active

Rubus idaeus L. · Red raspberry

The James Hutton Institute, Dundee, DD2 5DA

6 records

Glen Mor

Active

Rubus idaeus L. · Red raspberry

The James Hutton Institute, Dundee, DD2 5DA

5 records

Eva

Active

Sambucus nigra L. · Elderberry

Tobutt Kenneth Richard|Meopham, GB

5 records

Bondrepuho

Active

Xerochrysum bracteatum (Vent.) Tzvelev · Strawflower

Dr Andrew Bernuetz, Bonza Botanicals Pty Ltd

5 records

Balcabdepy

Active

Calibrachoa Cerv. · Calibrachoa

Ren Jianping

5 records

P07a10

Active

Glycine max (L.) Merr. · Soybean

Randy Kallem

IT UA

10 records

Pedrola

Active

Lactuca sativa L. · Lettuce

JONATHAN SINCLAIR (ENZA ZADEN BEHEER B.V.)

7 records

Julian

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds, NL

9 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.