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agronom.cc cultivar database

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.

Qualicum

Active

Rubus idaeus L. · Red raspberry

PACIFIC AGRI-FOOD RESEARCH CENTRE AGASSIZ

4 records

Pitstop

Terminated

Chrysanthemum L. · Chrysanthemum

Cleangro Ltd

1 record

Nidia Odorata

Active

Rosa L. · Rose

María del Carmen Martínez Rodríguez^^^José Luis Santiago Blanco^^^Pilar Gago Montaña^^^Susana Boso Alonso

1 record

Mormin1201

Active

Jasminum officinale L. x Jasminum polyanthum Franch.

BRANDED GARDEN PRODUCTS

1 record

Paulina

Active

Rhododendron simsii Planch. · Indica azalea

Karsten Rannacher

1 record

Lind

Active

Dracaena steudneri Schweinf. ex Engl.

Joost Vermeulen, Mathijs Vermeulen

2 records

MD01UNIBO

Application submitted

Malus domestica (Suckow) Borkh. · Apple

Roberto Gregori^^^Stefano Tartarini^^^Silviero Sansavini

1 record

MD03UNIBO

Application submitted

Malus domestica (Suckow) Borkh. · Apple

Roberto Gregori,Silviero Sansavini,Stefano Tartarini

1 record

LOWBEAM

Withdrawn

Jasminum officinale L. · Common Jasmine

Stuart Lowen

1 record

Kerverblu

Withdrawn

Petunia Juss. · Petunia

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

1 record

Kerbeldawn

Terminated

Primula vulgaris Huds. · Primrose

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

1 record

INNERYOZ

Terminated

Erysimum L. · Wallflower

Silvia Hofmann

1 record

INLOBLXBLE

Terminated

Lobelia erinus L. · Edging lobelia

Birgit Hofmann

1 record

Gradisca

Withdrawn

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

1 record

Kerphyrouge

Terminated

Phygelius x rectus Coombs

Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley

1 record

Glen Rosa

Active

Rubus idaeus L. · Red raspberry

SCOTTISH CROP RESEARCH INSTITUTE

4 records

HLR 200

Terminated

Helleborus x hybridus hort. ex Voss · Lenten rose

Nis van der Horst

1 record

Galicane

Active

Populus x canadensis Moench · Carolina poplar

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

1 record

FLOAG17002

Active

Aubrieta deltoidea (L.) DC.

Florensis B.V.

1 record

Connie

Active

Alstroemeria L. · Alstroemeria

Wülfinghoff Alstroemeria B.V.

1 record

CIFZ0019

Withdrawn

Chrysanthemum L. · Chrysanthemum

Mark A. Smith

2 records

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