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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 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.

Admir

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer

NL
6 records

Airton

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V. / Enza Zaden Beheer B.V.

NL
6 records

Aiace

Active

Cucumis melo L. · Melon

Enza Zaden Beheer B.V.

NL
5 records

845F

Active

Sorghum bicolor (L.) Moench · Sorghum

PIONEER HI-BRED INT

IT
4 records

Advisor

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

NL
5 records

Abarion

Withdrawn

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

FR
3 records

Absolon

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
5 records

UF06419

Active

Plectranthus scutellarioides (L.) R. Br. · Coleus

David G. Clark^^^Phuong Nguyen

3 records

ST 373

Active

Gossypium L. · Cotton

3 records

SAKPXC044

Application submitted

x Petchoa J. M. H. Shaw · Petchoa

Moriya Kawashima

3 records

SAKPXC039

Application submitted

x Petchoa J. M. H. Shaw · Petchoa

Moriya Kawashima

3 records

Spitfire

Active

Brassica napus var. napus · Rapeseed

FORAGE INNOVATIONS LTD

4 records

SAXZ0008

Active

Saxifraga x arendsii Engl. · Arends saxifrage

Syngenta Seeds B.V.

3 records

PHHJC

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

3 records

Ph17sb

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

3 records

Lannebraska

Active

Mandevilla sanderi (Hemsl.) Woodson · Brazilian jasmine

Lannes Robert

4 records

KLECA07108

Active

Calibrachoa Cerv. · Calibrachoa

Nils Klemm

3 records

Hope

Active

Peperomia deppeana x Peperomia quadrifolia

van der Velden Josephus M.

4 records

Golden Sunshine

Active

Salix udensis Trautv. & C. A. Mey.

Izumi Takuya|Ehime, Iyo-city, 1606-4 Kamimitani, JP

3 records

Hoho 1

Active

Berberis thunbergii DC. · Japanese barberry

Ralph Matheus Hoof, Mark Sebastiaan Hoogenraad

3 records

G 210

Active

Malus Mill. · Apple

Plants for Europe Ltd

4 records

Golden Orange

Active

Malus domestica (Suckow) Borkh. · Apple

Antonio Bergamini

4 records

ET RDB 401

Active

Rudbeckia L. · Coneflower

Eternal Plant Boijl B.V.

4 records

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