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 Cucumber 8 Indica azalea 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.

Chernyi Zhemchug

Active

Ribes nigrum L. · Blackcurrant

2 records

Aldoniai

Active

Ribes nigrum L. · Blackcurrant

3 records

Aprim

Active

Carum carvi L. · Caraway

3 records

Zefyr

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

2 records

Moscatel de Alejandria

Active

Vitis L. · Grapevine

3 records

Moskovskij Rubin

Active

Corylus avellana L. · Common hazel

2 records

CAMI

Active

Citrus L. · Citrus

2 records

CAMPONICA

Active

Corylus avellana L. · Common hazel

2 records

Vyčiai

Protection expired

Ribes nigrum L. · Blackcurrant

Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas

1 record

Wernisaż

Withdrawn

Ribes nigrum L. · Blackcurrant

Institut Sadiwnictwa Ukrainska Akademija Agrarnich Nauk Volodymyr Kopan

2 records

Vernisazh

Terminated

Ribes nigrum L. · Blackcurrant

Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,

1 record

VERIA DARK

Protection expired

Chrysanthemum indicum L. · Indian chrysanthemum

Dirk Pieters (BE)

1 record

VERIA

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

Georges Pieters (BE)/Dirk Pieters (BE)

1 record

Valjevka ISK

Active

Prunus domestica L. · European plum

Instytut Ogrodnictwa - Państwowy Instytut Badawczy

1 record

Vakariai

Protection expired

Ribes nigrum L. · Blackcurrant

Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas

1 record

Tibouren

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

TIMPURIE DE BACAU

Terminated

Phaseolus vulgaris L. · Common bean

STOIAN LUCIANAMBARUS SILVICA

1 record

Steffanie

Terminated

Rhododendron simsii Planch. · Indica azalea

BARDT| Albert Bardt (Gartenbau) / BARDT IRMTRAUT| Irmtraut Bardt / BARDT FRANK| Frank Bardt / BARDT FRED| Fred Bardt

1 record

Sofіivs'ka

Active

Ribes nigrum L. · Blackcurrant

Kopan Volodymyr Pavlovych, Kopan` Kira Mykolaivna,

1 record

Sofijewskaja

Withdrawn

Ribes nigrum L. · Blackcurrant

Institut Sadiwnictwa Ukrainska Akademija Agrarnich Nauk Volodymyr Kopan

2 records

Sankt Valentin

Terminated

Rhododendron simsii Planch. · Indica azalea

STAHNKE| Otto Stahnke (Gartenbaubetrieb)

1 record

Sama

Terminated

Cucurbita pepo L. · Field pumpkin

Wei Ouyang

2 records

Salviai

Terminated

Ribes nigrum L. · Blackcurrant

Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas

1 record

Renato

Terminated

Rhododendron simsii Planch. · Indica azalea

KARL GLASER

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.