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.

PENRHUB

Withdrawn

Nemesia Vent. · Nemesia

SIDNEY JAMES JONES|DAVID JAMES JONES

2 records

P67

Active

Malus domestica (Suckow) Borkh. · Apple

Instytut Ogrodnictwa - Państwowy Instytut Badawczy (The National Institute of Horticultural Research)

3 records

Mombello

Active

Populus x canadensis Moench · Carolina poplar

Gianni Facciotto^^^Lorenzo Vietto^^^Achille Giorcelli^^^Gaetano Castro^^^Giuseppe Nervo^^^Gianni Allegro^^^Maria de los Angeles Gras^^^Stefano Bisoffi

2 records

Orion

Active

Populus x canadensis Moench · Carolina poplar

CREA-FL

2 records

Melodie

Active

Vicia faba L. · Broad bean

Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)

3 records

MI00121

Active

Phalaenopsis Bl. · Moth Orchid

Floréac N.V.

2 records

Merlot Memories

Active

Veronica L. · Speedwell

Bransford Garden Plants Ltd.

2 records

Mandarina Bavaria

Active

Humulus lupulus L. · Common hop

Anton Lutz

2 records

Lannorthdakota

Active

Mandevilla sanderi (Hemsl.) Woodson · Brazilian jasmine

Lannes Robert

2 records

Malahat

Active

Rubus idaeus L. · Red raspberry

Pacific Agriculture and Agri-Food

5 records

Little Janie

Active

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

Lynne Knosher

2 records

Keidopinul

Active

Petunia Juss. · Petunia

Shinya Miyano

2 records

Inov205

Active

Lonicera periclymenum L. · Woodbine

Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE) , Saphinov S.N.C.

2 records

Jm1

Application submitted

Malus domestica (Suckow) Borkh. · Apple

YOSHIO YOSHIDA^^^SHICHIRO TSUCHIYA^^^Jun-ichi Soejima

3 records

Jm7

Active

Malus domestica (Suckow) Borkh. · Apple

YOSHIO YOSHIDA^^^SHICHIRO TSUCHIYA^^^Jun-ichi Soejima

3 records

Kerbuzzby

Active

Petunia x atkinsiana D. Don · Garden petunia

Priscilla Grace Kerley^^^David William Kerley^^^Sarah Elisabeth Kerley^^^Timothy Edward Kerley

2 records

Kerbespicit

Active

Begonia x tuberhybrida Voss · Tuberous begonia

Timothy Edward Kerley^^^David William Kerley^^^Priscilla Grace Kerley^^^Sarah Elisabeth Kerley

2 records

Grand Stone

Active

Scabiosa caucasica M. Bieb. · Pincushion Flower

van Steijn Peter|Voorhout, NL

2 records

JURMAG2

Active

Magnolia L. · Magnolia

Mark Jury

2 records

Kerskyfan

Active

Petunia x atkinsiana D. Don · Garden petunia

Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley

2 records

Greshen

Active

Phaseolus coccineus L. · Runner bean

Holland-Select Research B.V.

3 records

Helena

Active

Ulmus laevis Pall. · European white elm

Bart van de Sluis

2 records

JOSTAR

Active

Lavatera L. · Tree mallow

Hyfryd Plants

2 records

JHE00113

Active

Helleborus x hybridus hort. ex Voss · Lenten rose

Floréac N.V.

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.