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.

WL 311

Terminated

Medicago sativa L. · Alfalfa

WATERMAN LOOMIS

1 record

Vezha

Active

Triticum aestivum L. · Bread wheat

Vasylenko, Taisiia

2 records

Wigo

Withdrawn

Lactuca sativa L. · Lettuce

Syngenta Crop Protection AG

2 records

Vendaval

Application submitted

Cucumis melo L. · Melon

HM Clause SAS (FR)

1 record

VALGRANDE

Application submitted

Lactuca sativa L. · Lettuce

RAMIRO ARNEDO, S.A.

1 record

TOP SET

Withdrawn

Cucumis melo L. · Melon

SEMINIS VEGETABLE SEED IB

1 record

Tinos

Terminated

Vicia faba L. var. equina St.-Amans · Horse bean

Instytut Hodowli i Aklimatyzacji Roslin Panstwowy Instytut Badawczy

1 record

Tinga

Terminated

Lathyrus tingitanus L. · Gypsy Sweet Pea

SPAETH HANS| Dr. Hans Rolf Spaeth

1 record

Topaz

Terminated

Medicago sativa L. subsp. sativa · Alfalfa

AGRIPRO SEEDS

1 record

TEQUILA

Application submitted

Cucumis melo L. · Melon

MERIDIEM SEEDS S.L.

1 record

Tina

Active

Cucumis melo L. · Melon

Polivoda Lidiia Ivanivna, Drozdik Olena Oleksiivna, Zavertaliuk Volodymyr Filimonovych, Palinchak Oksana Volodymyrivna,

2 records

Teleno

Application submitted

Lactuca sativa L. · Lettuce

Vilmorin-Mikado SAS (FR)

1 record

Sweet Six BMR

Application submitted

Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass

GAYLAND WARD SEED CO. INC.

1 record

SUPERALFA DE CLUJ

Terminated

Humulus lupulus L. · Common hop

MUNTEAN LEON SORINCERNEA SOLOVASTRUSALONTAI ALEXANDRUMORAR GAVRILAVARBAN DANMUNTEAN LEONDUDA MARCELMUNTEAN SORINVARBAN RODICATOFANA MARIA

1 record

TAVASCAN

Application submitted

Lactuca sativa L. · Lettuce

RAMIRO ARNEDO, S.A.

1 record

SW3407

Application submitted

Medicago sativa L. subsp. sativa · Alfalfa

S&W SEED COMPANY

1 record

Sweet Forever BMR

Withdrawn

Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass

GAYLAND WARD SEED CO. INC.

1 record

SW3407

Application submitted

Medicago sativa L. · Alfalfa

Mark Smith

2 records

Strateia

Active

Sorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass

Kalashnyk Mykola Strateievych, Shevchenko Tetiana Anatoliivna, Samoilenko Anatolii Terentiievych, Yalanskyi Oleksandr Volodymyrovych,

4 records

Serpanok

Terminated

Monarda didyma L. · Bee balm

Korablova Olha Anatoliivna

2 records

Signale

Active

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

SILO PRO BMR

Application submitted

Sorghum bicolor (L.) Moench · Sorghum

GAYLAND WARD SEED CO. INC.

1 record

Segura

Application submitted

Lactuca sativa L. · Lettuce

Gautier Semences SAS (FR)

1 record

Sapko

Protection expired

Medicago sativa L. · Alfalfa

Bocsa Ivan / Buglos Janos / Majko Zoltan

1 record

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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.