Pests

Spider mite

Tetranychus urticae

The spider mite is an arachnid that damages plants by sucking out cell sap and chlorophyll. The damage manifests as yellowing, curling, and drying of leaves, which leads to a significant reduction in yield.

Mentioned in descriptions 1 326 varieties reference book.

The spider mite is a dangerous pest that pierces the leaf epidermis and sucks out cell sap, leading to the destruction of chloroplasts and the inhibition of photosynthesis. Initial signs of infestation include the appearance of small light spots on the upper side of the leaf. In advanced cases, a fine web and colonies of the pest are found on the underside of the leaf, and the plant itself turns yellow, dries up, and can lose up to 60% of its yield.

The rate of reproduction and the degree of damage directly depend on temperature and humidity: at +25...+30°C and humidity below 60%, the pest's development cycle shortens to 5–7 days. A favorable factor for mite feeding is excessive nitrogen nutrition, which makes plant tissues looser. Furthermore, crop vulnerability often depends on agronomic practices, as mites are prone to developing resistance rapidly.

A variety's resistance to spider mites is determined by morphological features, such as leaf blade density or the presence of trichomes, as well as biochemical characteristics. No unified international coding system for such resistance exists; therefore, in descriptions, it is usually assessed qualitatively as "tolerance" or "relative resistance." When selecting a variety, it is recommended to clarify the evaluation methodology, including the conditions of field trials or artificial infestation.

Sources10

Breakdown by crop

Two-spotted spider mite — strawberry 34 Spider mite — blackcurrant 18 Apple Spider Mite 16 Spider mites on grapevine 13 Spider Mites on Common Hazel 12 Spider mite on Hydrangea macrophylla 10 Spider Mite of Cucumber 8 Strawberry Spider Mite 7 Raspberry spider mite 6 Two-spotted spider mite on chrysanthemum 6 Spider Mite — Soybean 6 Spider mite — Hydrangea paniculata 5 Spider Mites of Grapevine 5 Azalea spider mite 4 Pear Spider Mite 3 Plum spider mite 3 Tomato spider mite 3 Spider mite on mullein 3 Citrus red mite 3 Spider Mites on Cordyline 3

Found in these crops

Blackcurrant 86 Common hazel 58 Grapevine 51 Garden strawberry 45 Common grape vine 26 Apple 16 Strawberry 14 Red raspberry 11 Bigleaf hydrangea 10 Indica azalea 8 Cucumber 8 Soybean 7

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.

Red Lava

Terminated

Begonia L. · Begonia

REVELL| John Revell

1 record

Red Elstar Goedhof

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

1 record

Red Annanas

Active

Malus domestica (Suckow) Borkh. · Apple

Information not available - Contact NL authorities

1 record

Profusion

Terminated

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Service Officiel de Controle (FR)

1 record

Prunelard

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Pilėnai

Terminated

Ribes nigrum L. · Blackcurrant

Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas

1 record

Osoblyva

Terminated

Hippophae rhamnoides L. · Sea buckthorn

Moskalets Valentyn Vitaliiovych, Moskalets Vitalii Ivanovych, Moskalets Tetiana Zakharivna, Hrynnyk Ihor Volodymyrovych,

2 records

Ol`viia

Active

Fragaria L. · Strawberry

Kopan Volodymyr Pavlovych, Kopan` Kira Mykolaivna,

1 record

Novost Kuzmina

Terminated

Rubus L. · Blackberry

Vladimir Kuzmin

1 record

Nora

Active

Fragaria L. · Strawberry

FAEDI WALTER

1 record

Muscadelle

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Michelle-Marie

Protection expired

Rhododendron simsii Planch. · Indica azalea

Karsten Rannacher

1 record

Mérille

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Monotur

Active

Salix L. · Willow

Uniwersytet Warmińsko-Mazurski w Olsztynie

1 record

MICHELLE-MARIE

Terminated

Rhododendron L. · Azalea

RANNACKER KARSTEN

1 record

Minaj Šmyriov

Protection expired

Ribes nigrum L. · Blackcurrant

Baltarusijos sodininkystės ir bulvininkystės mokslo tiriamasis institutas

1 record

Marylka

Active

Berberis thunbergii DC. · Japanese barberry

Dariusz Kapias

1 record

Loin de l'Oeil

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

LIVAL

Protection expired

Vitis L. · Grapevine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

1 record

Macabeu

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Lival

Active

Vitis vinifera L. · Common grape vine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

1 record

Kataloński ISK

Terminated

Corylus avellana L. · Common hazel

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Katiuša

Protection expired

Ribes nigrum L. · Blackcurrant

Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas

1 record

Kataloński KON

Terminated

Corylus avellana L. · Common hazel

Lubelski Ośrodek Doradztwa Rolniczego w Końskowoli

1 record

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Pests

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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.