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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.

G 16

Active

Malus Mill. · Apple

NL
2 records

Fayal

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Jantar

Active

Ribes rubrum L. · Redcurrant

CZ
8 records

E 815024

Active

Cucumis melo L. · Melon

NL
3 records

Fuzador

Active

Prunus persica (L.) Batsch · Peach

FR
3 records

Festival

Active

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

FR
2 records

Groc

Active

Cucumis melo L. · Melon

ES
3 records

Galileus

Active

Brassica napus L. · Rapeseed

UA
2 records

Dainiai

Active

Ribes nigrum L. · Blackcurrant

LT
4 records

Comox

Active

Rubus idaeus L. · Red raspberry

HU
3 records

G 30

Active

Malus Mill. · Apple

NL
2 records

Chabi

Active

Lactuca sativa L. · Lettuce

NL
3 records

Electra

Terminated

Lolium perenne L. · Perennial ryegrass

NL
2 records

Djembe

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Cowichan

Active

Rubus idaeus L. · Red raspberry

NL
4 records

Bayana

Active

Ribes rubrum L. · Redcurrant

EE
2 records

Conchita

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Black Hawk

Terminated

Cucurbita pepo L. · Field pumpkin

NL
2 records

Cardona

Active

Cucumis melo L. · Melon

HU
2 records

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