Pests
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.
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.
Ribes nigrum L. · Blackcurrant
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Ribes nigrum L. · Blackcurrant
Institut Sadiwnictwa Ukrainska Akademija Agrarnich Nauk Volodymyr Kopan
Rubus L. subg. Rubus · Blackberry
Niwa Hodowla Roślin Jagodowych sp. z o.o.
Corylus avellana L. · Common hazel
INCONNU (FR)
Vitis vinifera L. · Common grape vine
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Cucumis melo L. · Melon
Ahmet Oktay Turhan
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
PETOSEED CO
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Ribes nigrum L. · Blackcurrant
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Corylus avellana L. · Common hazel
Information not available - Contact NL authorities
Rhododendron L. · Azalea
DE LANGHE PETER
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Fragaria L. · Strawberry
Kopan` Kyra Mykolaivna, Kopan Volodymyr Pavlovych,
Ribes nigrum L. · Blackcurrant
Horticulture Research International| GB
Rhododendron simsii Planch. · Indica azalea
Karsten Rannacher
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Solanum melongena L. · Eggplant
Robert Priieur
Corylus avellana L. · Common hazel
Information not available - Contact NL authorities
Fragaria L. · Strawberry
Raquel Cervantes Moreno, Jorge Rodriguez Alcazar,
Cordyline Comm. ex Juss. · Palm lily
DE COOMAN FERNAND
Vitis L. · Grapevine
INCONNU (FR)
Corylus avellana L. · Common hazel
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Ribes nigrum L. · Blackcurrant
Kopan` Kira Mykolaivna, Kopan Volodymyr Pavlovych,
Ribes nigrum L. · Blackcurrant
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas