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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.

Blue Ace

Active

Medicago sativa L. · Alfalfa

IT
4 records

WILMUTA

Active

Malus domestica (Suckow) Borkh. · Apple

3 records

Adranita

Active

Lactuca sativa L. · Lettuce

NL
5 records

Anna

Active

Malus domestica (Suckow) Borkh. · Apple

NL
4 records

Premiant

Active

Humulus lupulus L. · Common hop

CZ SK
4 records

Phileaxx

Active

Zea mays L. · Maize

HU
3 records

Ruzika

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Chemainus

Active

Rubus idaeus L. · Red raspberry

NL
4 records

Barman

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Vasco

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

DE
2 records

Vroma

Active

Vicia faba L. · Broad bean

NL
3 records

Tarly

Active

Allium sativum L. · Garlic

CZ
3 records

Vikana

Active

Prunus domestica L. · European plum

EE
3 records

Topper

Active

Brassica rapa L. var. rapa (L.) Thell. · Turnip

NL
2 records

Saanich

Active

Rubus idaeus L. · Red raspberry

NL
4 records

Tivona

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

SW7408

Active

Medicago sativa L. · Alfalfa

IT
2 records

Rogar 8

Active

Avena sativa L. · Oat

IT
2 records

Ratio

Active

Vicia faba L. · Broad bean

NL
3 records

Shokichi Grey

Active

Cucurbita maxima Duchesne · Giant pumpkin

HU
2 records

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